The use of diffusion ANISOTROPY data from diffusion magnetic resonance imaging results to construct images based on the direction of the faster diffusing molecules.
A diagnostic technique that incorporates the measurement of molecular diffusion (such as water or metabolites) for tissue assessment by MRI. The degree of molecular movement can be measured by changes of apparent diffusion coefficient (ADC) with time, as reflected by tissue microstructure. Diffusion MRI has been used to study BRAIN ISCHEMIA and tumor response to treatment.
A physical property showing different values in relation to the direction in or along which the measurement is made. The physical property may be with regard to thermal or electric conductivity or light refraction. In crystallography, it describes crystals whose index of refraction varies with the direction of the incident light. It is also called acolotropy and colotropy. The opposite of anisotropy is isotropy wherein the same values characterize the object when measured along axes in all directions.
The tendency of a gas or solute to pass from a point of higher pressure or concentration to a point of lower pressure or concentration and to distribute itself throughout the available space. Diffusion, especially FACILITATED DIFFUSION, is a major mechanism of BIOLOGICAL TRANSPORT.
A class of nerve fibers as defined by their structure, specifically the nerve sheath arrangement. The AXONS of the myelinated nerve fibers are completely encased in a MYELIN SHEATH. They are fibers of relatively large and varied diameters. Their NEURAL CONDUCTION rates are faster than those of the unmyelinated nerve fibers (NERVE FIBERS, UNMYELINATED). Myelinated nerve fibers are present in somatic and autonomic nerves.
The selecting and organizing of visual stimuli based on the individual's past experience.
A technique of inputting two-dimensional images into a computer and then enhancing or analyzing the imagery into a form that is more useful to the human observer.
Broad plate of dense myelinated fibers that reciprocally interconnect regions of the cortex in all lobes with corresponding regions of the opposite hemisphere. The corpus callosum is located deep in the longitudinal fissure.
Methods developed to aid in the interpretation of ultrasound, radiographic images, etc., for diagnosis of disease.
Area of the OCCIPITAL LOBE concerned with the processing of visual information relayed via VISUAL PATHWAYS.
Set of cell bodies and nerve fibers conducting impulses from the eyes to the cerebral cortex. It includes the RETINA; OPTIC NERVE; optic tract; and geniculocalcarine tract.
The part of CENTRAL NERVOUS SYSTEM that is contained within the skull (CRANIUM). Arising from the NEURAL TUBE, the embryonic brain is comprised of three major parts including PROSENCEPHALON (the forebrain); MESENCEPHALON (the midbrain); and RHOMBENCEPHALON (the hindbrain). The developed brain consists of CEREBRUM; CEREBELLUM; and other structures in the BRAIN STEM.
Imaging techniques used to colocalize sites of brain functions or physiological activity with brain structures.
Investigative technique commonly used during ELECTROENCEPHALOGRAPHY in which a series of bright light flashes or visual patterns are used to elicit brain activity.
WHITE MATTER pathway, flanked by nuclear masses, consisting of both afferent and efferent fibers projecting between the WHITE MATTER and the BRAINSTEM. It consists of three distinct parts: an anterior limb, posterior limb, and genu.
Fibers that arise from cells within the cerebral cortex, pass through the medullary pyramid, and descend in the spinal cord. Many authorities say the pyramidal tracts include both the corticospinal and corticobulbar tracts.
A new pattern of perceptual or ideational material derived from past experience.
Improvement of the quality of a picture by various techniques, including computer processing, digital filtering, echocardiographic techniques, light and ultrastructural MICROSCOPY, fluorescence spectrometry and microscopy, scintigraphy, and in vitro image processing at the molecular level.
The electric response evoked in the cerebral cortex by visual stimulation or stimulation of the visual pathways.
Mental process to visually perceive a critical number of facts (the pattern), such as characters, shapes, displays, or designs.
The total area or space visible in a person's peripheral vision with the eye looking straightforward.
Neural tracts connecting one part of the nervous system with another.
Clarity or sharpness of OCULAR VISION or the ability of the eye to see fine details. Visual acuity depends on the functions of RETINA, neuronal transmission, and the interpretative ability of the brain. Normal visual acuity is expressed as 20/20 indicating that one can see at 20 feet what should normally be seen at that distance. Visual acuity can also be influenced by brightness, color, and contrast.
Lower lateral part of the cerebral hemisphere responsible for auditory, olfactory, and semantic processing. It is located inferior to the lateral fissure and anterior to the OCCIPITAL LOBE.
The process of generating three-dimensional images by electronic, photographic, or other methods. For example, three-dimensional images can be generated by assembling multiple tomographic images with the aid of a computer, while photographic 3-D images (HOLOGRAPHY) can be made by exposing film to the interference pattern created when two laser light sources shine on an object.
Non-invasive method of demonstrating internal anatomy based on the principle that atomic nuclei in a strong magnetic field absorb pulses of radiofrequency energy and emit them as radiowaves which can be reconstructed into computerized images. The concept includes proton spin tomographic techniques.
The process in which light signals are transformed by the PHOTORECEPTOR CELLS into electrical signals which can then be transmitted to the brain.
The statistical reproducibility of measurements (often in a clinical context), including the testing of instrumentation or techniques to obtain reproducible results. The concept includes reproducibility of physiological measurements, which may be used to develop rules to assess probability or prognosis, or response to a stimulus; reproducibility of occurrence of a condition; and reproducibility of experimental results.
A procedure consisting of a sequence of algebraic formulas and/or logical steps to calculate or determine a given task.
A relatively common sequela of blunt head injury, characterized by a global disruption of axons throughout the brain. Associated clinical features may include NEUROBEHAVIORAL MANIFESTATIONS; PERSISTENT VEGETATIVE STATE; DEMENTIA; and other disorders.
Any of various diseases affecting the white matter of the central nervous system.
Voluntary or reflex-controlled movements of the eye.
Binary classification measures to assess test results. Sensitivity or recall rate is the proportion of true positives. Specificity is the probability of correctly determining the absence of a condition. (From Last, Dictionary of Epidemiology, 2d ed)
Heavily myelinated fiber bundle of the TELENCEPHALON projecting from the hippocampal formation to the HYPOTHALAMUS. Some authorities consider the fornix part of the LIMBIC SYSTEM. The fimbria starts as a flattened band of axons arising from the subiculum and HIPPOCAMPUS, which then thickens to form the fornix.
The science dealing with the correlation of the physical characteristics of a stimulus, e.g., frequency or intensity, with the response to the stimulus, in order to assess the psychologic factors involved in the relationship.
A type of MAGNETIC RESONANCE IMAGING that uses only one nuclear spin excitation per image and therefore can obtain images in a fraction of a second rather than the minutes required in traditional MRI techniques. It is used in a variety of medical and scientific applications.
The real or apparent movement of objects through the visual field.
The time from the onset of a stimulus until a response is observed.
A short muscle that arises from the pharyngotympanic tube (EUSTACHIAN TUBE) and inserts into the handle of the MALLEUS. This muscle pulls the handle medially thus controlling the tension and movement of TYMPANIC MEMBRANE.
Any visible result of a procedure which is caused by the procedure itself and not by the entity being analyzed. Common examples include histological structures introduced by tissue processing, radiographic images of structures that are not naturally present in living tissue, and products of chemical reactions that occur during analysis.
In INFORMATION RETRIEVAL, machine-sensing or identification of visible patterns (shapes, forms, and configurations). (Harrod's Librarians' Glossary, 7th ed)
The part of the cerebral hemisphere anterior to the central sulcus, and anterior and superior to the lateral sulcus.
Collections of illustrative plates, charts, etc., usually with explanatory captions.
A species of the genus MACACA inhabiting India, China, and other parts of Asia. The species is used extensively in biomedical research and adapts very well to living with humans.
Slender processes of NEURONS, including the AXONS and their glial envelopes (MYELIN SHEATH). Nerve fibers conduct nerve impulses to and from the CENTRAL NERVOUS SYSTEM.
Tests designed to assess neurological function associated with certain behaviors. They are used in diagnosing brain dysfunction or damage and central nervous system disorders or injury.
Behavioral manifestations of cerebral dominance in which there is preferential use and superior functioning of either the left or the right side, as in the preferred use of the right hand or right foot.
Birth defect that results in a partial or complete absence of the CORPUS CALLOSUM. It may be isolated or a part of a syndrome (e.g., AICARDI'S SYNDROME; ACROCALLOSAL SYNDROME; ANDERMANN SYNDROME; and HOLOPROSENCEPHALY). Clinical manifestations include neuromotor skill impairment and INTELLECTUAL DISABILITY of variable severity.
Combination or superimposition of two images for demonstrating differences between them (e.g., radiograph with contrast vs. one without, radionuclide images using different radionuclides, radiograph vs. radionuclide image) and in the preparation of audiovisual materials (e.g., offsetting identical images, coloring of vessels in angiograms).
The basic cellular units of nervous tissue. Each neuron consists of a body, an axon, and dendrites. Their purpose is to receive, conduct, and transmit impulses in the NERVOUS SYSTEM.
Non-invasive methods of visualizing the CENTRAL NERVOUS SYSTEM, especially the brain, by various imaging modalities.
The thin layer of GRAY MATTER on the surface of the CEREBRAL HEMISPHERES that develops from the TELENCEPHALON and folds into gyri and sulchi. It reaches its highest development in humans and is responsible for intellectual faculties and higher mental functions.
Acute and chronic (see also BRAIN INJURIES, CHRONIC) injuries to the brain, including the cerebral hemispheres, CEREBELLUM, and BRAIN STEM. Clinical manifestations depend on the nature of injury. Diffuse trauma to the brain is frequently associated with DIFFUSE AXONAL INJURY or COMA, POST-TRAUMATIC. Localized injuries may be associated with NEUROBEHAVIORAL MANIFESTATIONS; HEMIPARESIS, or other focal neurologic deficits.
Three-dimensional representation to show anatomic structures. Models may be used in place of intact animals or organisms for teaching, practice, and study.
Paired bodies containing mostly GRAY MATTER and forming part of the lateral wall of the THIRD VENTRICLE of the brain.
Computer-based representation of physical systems and phenomena such as chemical processes.
The science and art of collecting, summarizing, and analyzing data that are subject to random variation. The term is also applied to the data themselves and to the summarization of the data.
Degeneration of distal aspects of a nerve axon following injury to the cell body or proximal portion of the axon. The process is characterized by fragmentation of the axon and its MYELIN SHEATH.
Dominance of one cerebral hemisphere over the other in cerebral functions.
Derived from TELENCEPHALON, cerebrum is composed of a right and a left hemisphere. Each contains an outer cerebral cortex and a subcortical basal ganglia. The cerebrum includes all parts within the skull except the MEDULLA OBLONGATA, the PONS, and the CEREBELLUM. Cerebral functions include sensorimotor, emotional, and intellectual activities.
Pathologic conditions affecting the BRAIN, which is composed of the intracranial components of the CENTRAL NERVOUS SYSTEM. This includes (but is not limited to) the CEREBRAL CORTEX; intracranial white matter; BASAL GANGLIA; THALAMUS; HYPOTHALAMUS; BRAIN STEM; and CEREBELLUM.
Theoretical representations that simulate the behavior or activity of the neurological system, processes or phenomena; includes the use of mathematical equations, computers, and other electronic equipment.
Disturbances in mental processes related to learning, thinking, reasoning, and judgment.
A meshlike structure composed of interconnecting nerve cells that are separated at the synaptic junction or joined to one another by cytoplasmic processes. In invertebrates, for example, the nerve net allows nerve impulses to spread over a wide area of the net because synapses can pass information in any direction.
One of the convolutions on the medial surface of the CEREBRAL HEMISPHERES. It surrounds the rostral part of the brain and CORPUS CALLOSUM and forms part of the LIMBIC SYSTEM.
Method of measuring and mapping the scope of vision, from central to peripheral of each eye.
Study of the anatomy of the nervous system as a specialty or discipline.
The range or frequency distribution of a measurement in a population (of organisms, organs or things) that has not been selected for the presence of disease or abnormality.
Visual impairments limiting one or more of the basic functions of the eye: visual acuity, dark adaptation, color vision, or peripheral vision. These may result from EYE DISEASES; OPTIC NERVE DISEASES; VISUAL PATHWAY diseases; OCCIPITAL LOBE diseases; OCULAR MOTILITY DISORDERS; and other conditions (From Newell, Ophthalmology: Principles and Concepts, 7th ed, p132).
The study of the structures of organisms for applications in art: drawing, painting, sculpture, illustration, etc.
Studies which start with the identification of persons with a disease of interest and a control (comparison, referent) group without the disease. The relationship of an attribute to the disease is examined by comparing diseased and non-diseased persons with regard to the frequency or levels of the attribute in each group.
Upper central part of the cerebral hemisphere. It is located posterior to central sulcus, anterior to the OCCIPITAL LOBE, and superior to the TEMPORAL LOBES.
Spectroscopic method of measuring the magnetic moment of elementary particles such as atomic nuclei, protons or electrons. It is employed in clinical applications such as NMR Tomography (MAGNETIC RESONANCE IMAGING).
Improvement in the quality of an x-ray image by use of an intensifying screen, tube, or filter and by optimum exposure techniques. Digital processing methods are often employed.
Theory and development of COMPUTER SYSTEMS which perform tasks that normally require human intelligence. Such tasks may include speech recognition, LEARNING; VISUAL PERCEPTION; MATHEMATICAL COMPUTING; reasoning, PROBLEM SOLVING, DECISION-MAKING, and translation of language.
The coordination of a sensory or ideational (cognitive) process and a motor activity.
The passive movement of molecules exceeding the rate expected by simple diffusion. No energy is expended in the process. It is achieved by the introduction of passively diffusing molecules to an enviroment or path that is more favorable to the movement of those molecules. Examples of facilitated diffusion are passive transport of hydrophilic substances across a lipid membrane through hydrophilic pores that traverse the membrane, and the sliding of a DNA BINDING PROTEIN along a strand of DNA.
A statistical technique that isolates and assesses the contributions of categorical independent variables to variation in the mean of a continuous dependent variable.
The most common clinical variant of MULTIPLE SCLEROSIS, characterized by recurrent acute exacerbations of neurologic dysfunction followed by partial or complete recovery. Common clinical manifestations include loss of visual (see OPTIC NEURITIS), motor, sensory, or bladder function. Acute episodes of demyelination may occur at any site in the central nervous system, and commonly involve the optic nerves, spinal cord, brain stem, and cerebellum. (Adams et al., Principles of Neurology, 6th ed, pp903-914)
Diseases characterized by loss or dysfunction of myelin in the central or peripheral nervous system.
Nerve fibers that are capable of rapidly conducting impulses away from the neuron cell body.
A comprehensive map of the physical interconnections of an organism's neural networks. This modular organization of neuronal architecture is believed to underlie disease mechanisms and the biological development of the CENTRAL NERVOUS SYSTEM.
The gradual irreversible changes in structure and function of an organism that occur as a result of the passage of time.
Elements of limited time intervals, contributing to particular results or situations.
Decrease in the size of a cell, tissue, organ, or multiple organs, associated with a variety of pathological conditions such as abnormal cellular changes, ischemia, malnutrition, or hormonal changes.
The lipid-rich sheath surrounding AXONS in both the CENTRAL NERVOUS SYSTEMS and PERIPHERAL NERVOUS SYSTEM. The myelin sheath is an electrical insulator and allows faster and more energetically efficient conduction of impulses. The sheath is formed by the cell membranes of glial cells (SCHWANN CELLS in the peripheral and OLIGODENDROGLIA in the central nervous system). Deterioration of the sheath in DEMYELINATING DISEASES is a serious clinical problem.
Statistical formulations or analyses which, when applied to data and found to fit the data, are then used to verify the assumptions and parameters used in the analysis. Examples of statistical models are the linear model, binomial model, polynomial model, two-parameter model, etc.
Focusing on certain aspects of current experience to the exclusion of others. It is the act of heeding or taking notice or concentrating.
A cylindrical column of tissue that lies within the vertebral canal. It is composed of WHITE MATTER and GRAY MATTER.
Neoplasms of the intracranial components of the central nervous system, including the cerebral hemispheres, basal ganglia, hypothalamus, thalamus, brain stem, and cerebellum. Brain neoplasms are subdivided into primary (originating from brain tissue) and secondary (i.e., metastatic) forms. Primary neoplasms are subdivided into benign and malignant forms. In general, brain tumors may also be classified by age of onset, histologic type, or presenting location in the brain.
The largest and most lateral of the BASAL GANGLIA lying between the lateral medullary lamina of the GLOBUS PALLIDUS and the EXTERNAL CAPSULE. It is part of the neostriatum and forms part of the LENTIFORM NUCLEUS along with the GLOBUS PALLIDUS.
A surgical specialty concerned with the treatment of diseases and disorders of the brain, spinal cord, and peripheral and sympathetic nervous system.
Posterior portion of the CEREBRAL HEMISPHERES responsible for processing visual sensory information. It is located posterior to the parieto-occipital sulcus and extends to the preoccipital notch.
Continuous frequency distribution of infinite range. Its properties are as follows: 1, continuous, symmetrical distribution with both tails extending to infinity; 2, arithmetic mean, mode, and median identical; and 3, shape completely determined by the mean and standard deviation.
Intraoperative computer-assisted 3D navigation and guidance system generally used in neurosurgery for tracking surgical tools and localize them with respect to the patient's 3D anatomy. The pre-operative diagnostic scan is used as a reference and is transferred onto the operative field during surgery.
A severe emotional disorder of psychotic depth characteristically marked by a retreat from reality with delusion formation, HALLUCINATIONS, emotional disharmony, and regressive behavior.
Physical motion, i.e., a change in position of a body or subject as a result of an external force. It is distinguished from MOVEMENT, a process resulting from biological activity.
Intellectual or mental process whereby an organism obtains knowledge.
The 2nd cranial nerve which conveys visual information from the RETINA to the brain. The nerve carries the axons of the RETINAL GANGLION CELLS which sort at the OPTIC CHIASM and continue via the OPTIC TRACTS to the brain. The largest projection is to the lateral geniculate nuclei; other targets include the SUPERIOR COLLICULI and the SUPRACHIASMATIC NUCLEI. Though known as the second cranial nerve, it is considered part of the CENTRAL NERVOUS SYSTEM.
Application of statistical procedures to analyze specific observed or assumed facts from a particular study.
A condition characterized by long-standing brain dysfunction or damage, usually of three months duration or longer. Potential etiologies include BRAIN INFARCTION; certain NEURODEGENERATIVE DISORDERS; CRANIOCEREBRAL TRAUMA; ANOXIA, BRAIN; ENCEPHALITIS; certain NEUROTOXICITY SYNDROMES; metabolic disorders (see BRAIN DISEASES, METABOLIC); and other conditions.
Copper chelator that inhibits monoamine oxidase and causes liver and brain damage.
Theoretical representations that simulate the behavior or activity of biological processes or diseases. For disease models in living animals, DISEASE MODELS, ANIMAL is available. Biological models include the use of mathematical equations, computers, and other electronic equipment.
Computer-assisted study of methods for obtaining useful quantitative solutions to problems that have been expressed mathematically.
Syndromes which feature DYSKINESIAS as a cardinal manifestation of the disease process. Included in this category are degenerative, hereditary, post-infectious, medication-induced, post-inflammatory, and post-traumatic conditions.
An autoimmune disorder mainly affecting young adults and characterized by destruction of myelin in the central nervous system. Pathologic findings include multiple sharply demarcated areas of demyelination throughout the white matter of the central nervous system. Clinical manifestations include visual loss, extra-ocular movement disorders, paresthesias, loss of sensation, weakness, dysarthria, spasticity, ataxia, and bladder dysfunction. The usual pattern is one of recurrent attacks followed by partial recovery (see MULTIPLE SCLEROSIS, RELAPSING-REMITTING), but acute fulminating and chronic progressive forms (see MULTIPLE SCLEROSIS, CHRONIC PROGRESSIVE) also occur. (Adams et al., Principles of Neurology, 6th ed, p903)
Computer systems or networks designed to provide radiographic interpretive information.
A set of forebrain structures common to all mammals that is defined functionally and anatomically. It is implicated in the higher integration of visceral, olfactory, and somatic information as well as homeostatic responses including fundamental survival behaviors (feeding, mating, emotion). For most authors, it includes the AMYGDALA; EPITHALAMUS; GYRUS CINGULI; hippocampal formation (see HIPPOCAMPUS); HYPOTHALAMUS; PARAHIPPOCAMPAL GYRUS; SEPTAL NUCLEI; anterior nuclear group of thalamus, and portions of the basal ganglia. (Parent, Carpenter's Human Neuroanatomy, 9th ed, p744; NeuroNames, (September 2, 1998)).
The front part of the hindbrain (RHOMBENCEPHALON) that lies between the MEDULLA and the midbrain (MESENCEPHALON) ventral to the cerebellum. It is composed of two parts, the dorsal and the ventral. The pons serves as a relay station for neural pathways between the CEREBELLUM to the CEREBRUM.
Theoretical representations that simulate the behavior or activity of systems, processes, or phenomena. They include the use of mathematical equations, computers, and other electronic equipment.
The part of the brain that connects the CEREBRAL HEMISPHERES with the SPINAL CORD. It consists of the MESENCEPHALON; PONS; and MEDULLA OBLONGATA.
A rare genetic disorder characterized by partial or complete absence of the CORPUS CALLOSUM, resulting in infantile spasms, MENTAL RETARDATION, and lesions of the RETINA or OPTIC NERVE.
Any visual display of structural or functional patterns of organs or tissues for diagnostic evaluation. It includes measuring physiologic and metabolic responses to physical and chemical stimuli, as well as ultramicroscopy.
Devices or objects in various imaging techniques used to visualize or enhance visualization by simulating conditions encountered in the procedure. Phantoms are used very often in procedures employing or measuring x-irradiation or radioactive material to evaluate performance. Phantoms often have properties similar to human tissue. Water demonstrates absorbing properties similar to normal tissue, hence water-filled phantoms are used to map radiation levels. Phantoms are used also as teaching aids to simulate real conditions with x-ray or ultrasonic machines. (From Iturralde, Dictionary and Handbook of Nuclear Medicine and Clinical Imaging, 1990)
Loss of higher cortical functions with retained awareness due to multiple cortical or subcortical CEREBRAL INFARCTION. Memory, judgment, attention span, and impulse control are often impaired, and may be accompanied by PSEUDOBULBAR PALSY; HEMIPARESIS; reflex abnormalities, and other signs of localized neurologic dysfunction. (From Adams et al., Principles of Neurology, 6th ed, p1060)
A non-inherited congenital condition with vascular and neurological abnormalities. It is characterized by facial vascular nevi (PORT-WINE STAIN), and capillary angiomatosis of intracranial membranes (MENINGES; CHOROID). Neurological features include EPILEPSY; cognitive deficits; GLAUCOMA; and visual defects.
The failure by the observer to measure or identify a phenomenon accurately, which results in an error. Sources for this may be due to the observer's missing an abnormality, or to faulty technique resulting in incorrect test measurement, or to misinterpretation of the data. Two varieties are inter-observer variation (the amount observers vary from one another when reporting on the same material) and intra-observer variation (the amount one observer varies between observations when reporting more than once on the same material).
The comparison of the quantity of meaningful data to the irrelevant or incorrect data.
The awareness of the spatial properties of objects; includes physical space.
Substances used to allow enhanced visualization of tissues.
Conditions characterized by persistent brain damage or dysfunction as sequelae of cranial trauma. This disorder may result from DIFFUSE AXONAL INJURY; INTRACRANIAL HEMORRHAGES; BRAIN EDEMA; and other conditions. Clinical features may include DEMENTIA; focal neurologic deficits; PERSISTENT VEGETATIVE STATE; AKINETIC MUTISM; or COMA.
Elongated gray mass of the neostriatum located adjacent to the lateral ventricle of the brain.
Standardized tests that measure the present general ability or aptitude for intellectual performance.
Observation of a population for a sufficient number of persons over a sufficient number of years to generate incidence or mortality rates subsequent to the selection of the study group.
The X-shaped structure formed by the meeting of the two optic nerves. At the optic chiasm the fibers from the medial part of each retina cross to project to the other side of the brain while the lateral retinal fibers continue on the same side. As a result each half of the brain receives information about the contralateral visual field from both eyes.
A nonspecific term used to describe transient alterations or loss of consciousness following closed head injuries. The duration of UNCONSCIOUSNESS generally lasts a few seconds, but may persist for several hours. Concussions may be classified as mild, intermediate, and severe. Prolonged periods of unconsciousness (often defined as greater than 6 hours in duration) may be referred to as post-traumatic coma (COMA, POST-HEAD INJURY). (From Rowland, Merritt's Textbook of Neurology, 9th ed, p418)
An involuntary movement accompanying a volitional movement. It often refers to facial movements that accompany FACIAL PARALYSIS.
A degenerative disease of the central nervous system characterized by balance difficulties; OCULAR MOTILITY DISORDERS (supranuclear ophthalmoplegia); DYSARTHRIA; swallowing difficulties; and axial DYSTONIA. Onset is usually in the fifth decade and disease progression occurs over several years. Pathologic findings include neurofibrillary degeneration and neuronal loss in the dorsal MESENCEPHALON; SUBTHALAMIC NUCLEUS; RED NUCLEUS; pallidum; dentate nucleus; and vestibular nuclei. (From Adams et al., Principles of Neurology, 6th ed, pp1076-7)
The last bone in the VERTEBRAL COLUMN in tailless primates considered to be a vestigial tail-bone consisting of three to five fused VERTEBRAE.
The positioning and accommodation of eyes that allows the image to be brought into place on the FOVEA CENTRALIS of each eye.
Computer-assisted processing of electric, ultrasonic, or electronic signals to interpret function and activity.
The part of brain that lies behind the BRAIN STEM in the posterior base of skull (CRANIAL FOSSA, POSTERIOR). It is also known as the "little brain" with convolutions similar to those of CEREBRAL CORTEX, inner white matter, and deep cerebellar nuclei. Its function is to coordinate voluntary movements, maintain balance, and learn motor skills.
Portion of midbrain situated under the dorsal TECTUM MESENCEPHALI. The two ventrolateral cylindrical masses or peduncles are large nerve fiber bundles providing a tract of passage between the FOREBRAIN with the HINDBRAIN. Ventral MIDBRAIN also contains three colorful structures: the GRAY MATTER (PERIAQUEDUCTAL GRAY), the black substance (SUBSTANTIA NIGRA), and the RED NUCLEUS.
A clear, odorless, tasteless liquid that is essential for most animal and plant life and is an excellent solvent for many substances. The chemical formula is hydrogen oxide (H2O). (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
A verbal or nonverbal means of communicating ideas or feelings.
Motion of an object in which either one or more points on a line are fixed. It is also the motion of a particle about a fixed point. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
The ability to detect sharp boundaries (stimuli) and to detect slight changes in luminance at regions without distinct contours. Psychophysical measurements of this visual function are used to evaluate visual acuity and to detect eye disease.
A degenerative disease of the BRAIN characterized by the insidious onset of DEMENTIA. Impairment of MEMORY, judgment, attention span, and problem solving skills are followed by severe APRAXIAS and a global loss of cognitive abilities. The condition primarily occurs after age 60, and is marked pathologically by severe cortical atrophy and the triad of SENILE PLAQUES; NEUROFIBRILLARY TANGLES; and NEUROPIL THREADS. (From Adams et al., Principles of Neurology, 6th ed, pp1049-57)
The first seven VERTEBRAE of the SPINAL COLUMN, which correspond to the VERTEBRAE of the NECK.
Uncrossed tracts of motor nerves from the brain to the anterior horns of the spinal cord, involved in reflexes, locomotion, complex movements, and postural control.
Sequential operating programs and data which instruct the functioning of a digital computer.
Tomography using x-ray transmission and a computer algorithm to reconstruct the image.
A localization-related (focal) form of epilepsy characterized by recurrent seizures that arise from foci within the temporal lobe, most commonly from its mesial aspect. A wide variety of psychic phenomena may be associated, including illusions, hallucinations, dyscognitive states, and affective experiences. The majority of complex partial seizures (see EPILEPSY, COMPLEX PARTIAL) originate from the temporal lobes. Temporal lobe seizures may be classified by etiology as cryptogenic, familial, or symptomatic (i.e., related to an identified disease process or lesion). (From Adams et al., Principles of Neurology, 6th ed, p321)
Autosomal recessive syndrome characterized by hypogenesis or agenesis of CORPUS CALLOSUM. Clinical features include MENTAL RETARDATION; CRANIOFACIAL ABNORMALITIES; digital malformations, and growth retardation.
A pathway of fibers that originates in the lateral part of the ENTORHINAL CORTEX, perforates the SUBICULUM of the HIPPOCAMPUS, and runs into the stratum moleculare of the hippocampus, where these fibers synapse with others that go to the DENTATE GYRUS where the pathway terminates. It is also known as the perforating fasciculus.
Studies to determine the advantages or disadvantages, practicability, or capability of accomplishing a projected plan, study, or project.
A cognitive disorder characterized by an impaired ability to comprehend written and printed words or phrases despite intact vision. This condition may be developmental or acquired. Developmental dyslexia is marked by reading achievement that falls substantially below that expected given the individual's chronological age, measured intelligence, and age-appropriate education. The disturbance in reading significantly interferes with academic achievement or with activities of daily living that require reading skills. (From DSM-IV)
Fluids composed mainly of water found within the body.
Type III intermediate filament proteins that assemble into neurofilaments, the major cytoskeletal element in nerve axons and dendrites. They consist of three distinct polypeptides, the neurofilament triplet. Types I, II, and IV intermediate filament proteins form other cytoskeletal elements such as keratins and lamins. It appears that the metabolism of neurofilaments is disturbed in Alzheimer's disease, as indicated by the presence of neurofilament epitopes in the neurofibrillary tangles, as well as by the severe reduction of the expression of the gene for the light neurofilament subunit of the neurofilament triplet in brains of Alzheimer's patients. (Can J Neurol Sci 1990 Aug;17(3):302)
A series of tests used to assess various functions of the eyes.
An infant during the first month after birth.
Increased intracellular or extracellular fluid in brain tissue. Cytotoxic brain edema (swelling due to increased intracellular fluid) is indicative of a disturbance in cell metabolism, and is commonly associated with hypoxic or ischemic injuries (see HYPOXIA, BRAIN). An increase in extracellular fluid may be caused by increased brain capillary permeability (vasogenic edema), an osmotic gradient, local blockages in interstitial fluid pathways, or by obstruction of CSF flow (e.g., obstructive HYDROCEPHALUS). (From Childs Nerv Syst 1992 Sep; 8(6):301-6)
Benign and malignant central nervous system neoplasms derived from glial cells (i.e., astrocytes, oligodendrocytes, and ependymocytes). Astrocytes may give rise to astrocytomas (ASTROCYTOMA) or glioblastoma multiforme (see GLIOBLASTOMA). Oligodendrocytes give rise to oligodendrogliomas (OLIGODENDROGLIOMA) and ependymocytes may undergo transformation to become EPENDYMOMA; CHOROID PLEXUS NEOPLASMS; or colloid cysts of the third ventricle. (From Escourolle et al., Manual of Basic Neuropathology, 2nd ed, p21)
The ten-layered nervous tissue membrane of the eye. It is continuous with the OPTIC NERVE and receives images of external objects and transmits visual impulses to the brain. Its outer surface is in contact with the CHOROID and the inner surface with the VITREOUS BODY. The outer-most layer is pigmented, whereas the inner nine layers are transparent.
The inability to see or the loss or absence of perception of visual stimuli. This condition may be the result of EYE DISEASES; OPTIC NERVE DISEASES; OPTIC CHIASM diseases; or BRAIN DISEASES affecting the VISUAL PATHWAYS or OCCIPITAL LOBE.
Area of the FRONTAL LOBE concerned with primary motor control located in the dorsal PRECENTRAL GYRUS immediately anterior to the central sulcus. It is comprised of three areas: the primary motor cortex located on the anterior paracentral lobule on the medial surface of the brain; the premotor cortex located anterior to the primary motor cortex; and the supplementary motor area located on the midline surface of the hemisphere anterior to the primary motor cortex.
The blending of separate images seen by each eye into one composite image.
In statistics, a technique for numerically approximating the solution of a mathematical problem by studying the distribution of some random variable, often generated by a computer. The name alludes to the randomness characteristic of the games of chance played at the gambling casinos in Monte Carlo. (From Random House Unabridged Dictionary, 2d ed, 1993)
A neurosurgical procedure that removes the anterior TEMPORAL LOBE including the medial temporal structures of CEREBRAL CORTEX; AMYGDALA; HIPPOCAMPUS; and the adjacent PARAHIPPOCAMPAL GYRUS. This procedure is generally used for the treatment of intractable temporal epilepsy (EPILEPSY, TEMPORAL LOBE).
Pathological processes or diseases where cerebral MICROVESSELS show abnormalities. They are often associated with aging, hypertension and risk factors for lacunar infarcts (see LACUNAR INFARCTION); LEUKOARAIOSIS; and CEREBRAL HEMORRHAGE.
Complex mental function having four distinct phases: (1) memorizing or learning, (2) retention, (3) recall, and (4) recognition. Clinically, it is usually subdivided into immediate, recent, and remote memory.
Large subcortical nuclear masses derived from the telencephalon and located in the basal regions of the cerebral hemispheres.
Disorders resulting from defects in migration of neuronal cells during neurogenesis. Developing nerve cells either fail to migrate or they migrate to incorrect positions resulting in formation of heterotopias, lissencephaly, or other malformations and dysfunctions of the nervous system.
Pathologic conditions which feature SPINAL CORD damage or dysfunction, including disorders involving the meninges and perimeningeal spaces surrounding the spinal cord. Traumatic injuries, vascular diseases, infections, and inflammatory/autoimmune processes may affect the spinal cord.
In screening and diagnostic tests, the probability that a person with a positive test is a true positive (i.e., has the disease), is referred to as the predictive value of a positive test; whereas, the predictive value of a negative test is the probability that the person with a negative test does not have the disease. Predictive value is related to the sensitivity and specificity of the test.
Loss of functional activity and trophic degeneration of nerve axons and their terminal arborizations following the destruction of their cells of origin or interruption of their continuity with these cells. The pathology is characteristic of neurodegenerative diseases. Often the process of nerve degeneration is studied in research on neuroanatomical localization and correlation of the neurophysiology of neural pathways.
Levels within a diagnostic group which are established by various measurement criteria applied to the seriousness of a patient's disorder.
Signals for an action; that specific portion of a perceptual field or pattern of stimuli to which a subject has learned to respond.
Studies in which individuals or populations are followed to assess the outcome of exposures, procedures, or effects of a characteristic, e.g., occurrence of disease.
A prodromal phase of cognitive decline that may precede the emergence of ALZHEIMER DISEASE and other dementias. It may include impairment of cognition, such as impairments in language, visuospatial awareness, ATTENTION and MEMORY.
A progressive form of dementia characterized by the global loss of language abilities and initial preservation of other cognitive functions. Fluent and nonfluent subtypes have been described. Eventually a pattern of global cognitive dysfunction, similar to ALZHEIMER DISEASE, emerges. Pathologically, there are no Alzheimer or PICK DISEASE like changes, however, spongiform changes of cortical layers II and III are present in the TEMPORAL LOBE and FRONTAL LOBE. (From Brain 1998 Jan;121(Pt 1):115-26)
A language dysfunction characterized by the inability to name people and objects that are correctly perceived. The individual is able to describe the object in question, but cannot provide the name. This condition is associated with lesions of the dominant hemisphere involving the language areas, in particular the TEMPORAL LOBE. (From Adams et al., Principles of Neurology, 6th ed, p484)
A group of pathological conditions characterized by sudden, non-convulsive loss of neurological function due to BRAIN ISCHEMIA or INTRACRANIAL HEMORRHAGES. Stroke is classified by the type of tissue NECROSIS, such as the anatomic location, vasculature involved, etiology, age of the affected individual, and hemorrhagic vs. non-hemorrhagic nature. (From Adams et al., Principles of Neurology, 6th ed, pp777-810)
A syndrome characterized by slowly progressive unilateral atrophy of facial subcutaneous fat, muscle tissue, skin, cartilage, and bone. The condition typically progresses over a period of 2-10 years and then stabilizes.
Intracranial tumors originating in the region of the brain inferior to the tentorium cerebelli, which contains the cerebellum, fourth ventricle, cerebellopontine angle, brain stem, and related structures. Primary tumors of this region are more frequent in children, and may present with ATAXIA; CRANIAL NERVE DISEASES; vomiting; HEADACHE; HYDROCEPHALUS; or other signs of neurologic dysfunction. Relatively frequent histologic subtypes include TERATOMA; MEDULLOBLASTOMA; GLIOBLASTOMA; ASTROCYTOMA; EPENDYMOMA; CRANIOPHARYNGIOMA; and choroid plexus papilloma (PAPILLOMA, CHOROID PLEXUS).
A general term referring to a mild to moderate degree of muscular weakness, occasionally used as a synonym for PARALYSIS (severe or complete loss of motor function). In the older literature, paresis often referred specifically to paretic neurosyphilis (see NEUROSYPHILIS). "General paresis" and "general paralysis" may still carry that connotation. Bilateral lower extremity paresis is referred to as PARAPARESIS.
Assessment of sensory and motor responses and reflexes that is used to determine impairment of the nervous system.
Congenital, or rarely acquired, herniation of meningeal and spinal cord tissue through a bony defect in the vertebral column. The majority of these defects occur in the lumbosacral region. Clinical features include PARAPLEGIA, loss of sensation in the lower body, and incontinence. This condition may be associated with the ARNOLD-CHIARI MALFORMATION and HYDROCEPHALUS. (From Joynt, Clinical Neurology, 1992, Ch55, pp35-6)
Remembrance of information for a few seconds to hours.
A form of multiple sclerosis characterized by a progressive deterioration in neurologic function which is in contrast to the more typical relapsing remitting form. If the clinical course is free of distinct remissions, it is referred to as primary progressive multiple sclerosis. When the progressive decline is punctuated by acute exacerbations, it is referred to as progressive relapsing multiple sclerosis. The term secondary progressive multiple sclerosis is used when relapsing remitting multiple sclerosis evolves into the chronic progressive form. (From Ann Neurol 1994;36 Suppl:S73-S79; Adams et al., Principles of Neurology, 6th ed, pp903-914)
A set of cognitive functions that controls complex, goal-directed thought and behavior. Executive function involves multiple domains, such as CONCEPT FORMATION, goal management, cognitive flexibility, INHIBITION control, and WORKING MEMORY. Impaired executive function is seen in a range of disorders, e.g., SCHIZOPHRENIA; and ADHD.
Differential response to different stimuli.
The worsening of a disease over time. This concept is most often used for chronic and incurable diseases where the stage of the disease is an important determinant of therapy and prognosis.
One of the non-essential amino acids commonly occurring in the L-form. It is found in animals and plants, especially in sugar cane and sugar beets. It may be a neurotransmitter.
The capacity of the NERVOUS SYSTEM to change its reactivity as the result of successive activations.
The ability to learn and to deal with new situations and to deal effectively with tasks involving abstractions.
An element with atomic symbol O, atomic number 8, and atomic weight [15.99903; 15.99977]. It is the most abundant element on earth and essential for respiration.
Twelve pairs of nerves that carry general afferent, visceral afferent, special afferent, somatic efferent, and autonomic efferent fibers.
Recording of electric currents developed in the brain by means of electrodes applied to the scalp, to the surface of the brain, or placed within the substance of the brain.
Disturbances in registering an impression, in the retention of an acquired impression, or in the recall of an impression. Memory impairments are associated with DEMENTIA; CRANIOCEREBRAL TRAUMA; ENCEPHALITIS; ALCOHOLISM (see also ALCOHOL AMNESTIC DISORDER); SCHIZOPHRENIA; and other conditions.
Studies in which variables relating to an individual or group of individuals are assessed over a period of time.
Statistical models in which the value of a parameter for a given value of a factor is assumed to be equal to a + bx, where a and b are constants. The models predict a linear regression.
Non-consumption of ALCOHOLIC BEVERAGES.
The rostral part of the frontal lobe, bounded by the inferior precentral fissure in humans, which receives projection fibers from the MEDIODORSAL NUCLEUS OF THE THALAMUS. The prefrontal cortex receives afferent fibers from numerous structures of the DIENCEPHALON; MESENCEPHALON; and LIMBIC SYSTEM as well as cortical afferents of visual, auditory, and somatic origin.
Studies used to test etiologic hypotheses in which inferences about an exposure to putative causal factors are derived from data relating to characteristics of persons under study or to events or experiences in their past. The essential feature is that some of the persons under study have the disease or outcome of interest and their characteristics are compared with those of unaffected persons.
Small-scale tests of methods and procedures to be used on a larger scale if the pilot study demonstrates that these methods and procedures can work.
Toxic asphyxiation due to the displacement of oxygen from oxyhemoglobin by carbon monoxide.
A curved elevation of GRAY MATTER extending the entire length of the floor of the TEMPORAL HORN of the LATERAL VENTRICLE (see also TEMPORAL LOBE). The hippocampus proper, subiculum, and DENTATE GYRUS constitute the hippocampal formation. Sometimes authors include the ENTORHINAL CORTEX in the hippocampal formation.
Degeneration of white matter adjacent to the CEREBRAL VENTRICLES following cerebral hypoxia or BRAIN ISCHEMIA in neonates. The condition primarily affects white matter in the perfusion zone between superficial and deep branches of the MIDDLE CEREBRAL ARTERY. Clinical manifestations include VISION DISORDERS; CEREBRAL PALSY; PARAPLEGIA; SEIZURES; and cognitive disorders. (From Adams et al., Principles of Neurology, 6th ed, p1021; Joynt, Clinical Neurology, 1997, Ch4, pp30-1)
The minimum amount of stimulus energy necessary to elicit a sensory response.
A partial or complete return to the normal or proper physiologic activity of an organ or part following disease or trauma.
2010) who used diffusion tensor magnetic resonance imaging to trace the amount of water flow throughout the brain. This region ... Coull, J.T., Frith, C.D., Frackowiak, R.S.J., & Grasby, P.M. (1996). A fronto-parietal network for rapid visual information ... and multiple images in recognition of wanted persons. Journal of Police and Criminal Psychology.. ... Lesion symptom analysis using diffusion tensor imaging. BMC Neuroscience, 11, 147-154. ...
A diffusion tensor imaging tractography atlas for virtual in vivo dissections. Cortex.;44(8):1105-32. Fernández-Miranda, J.C., ... Visual hypoemotionality as a symptom of visual±limbic disconnection in man. Arch Neurol; 39: 702-8. Sierra, M., Lopera, F., ... doi: 10.3389/fnana.2018.00077 Atlas image: n1a5p6 at the University of Michigan Health System - "Dissection of the Left ... Using diffusion tensor imaging (DTI), several authors have confirmed the presence of this constant longitudinal pathway in ...
His laboratory has been using a wide variety of techniques including anatomy (diffusion tensor imaging, voxel-based morphometry ... that converts visual images into electrotactile pulses applied to the tongue via a grid made out of tiny electrodes. He ... Maurice Ptito is a specialist in the study of Development and Plasticity of the visual system in various species including Man ... The major goal of his research is the understanding of the mechanisms involved in Visual Plasticity in normal developing ...
Diffusion tensor imaging (DTI or dMRI) along with fiber-tracking (FT) algorithms and functional Magnetic Resonance Imaging ( ... The visual white matter: The application of diffusion MRI and fiber tractography to vision science. Journal of Vision, 17(2), 4 ... fMRI) is used to image these bundles. For instance, occipital-callosal fiber tracts were localized with 1-2 mm precision using ... The corpus callosum connects the two halves of the brain at the bottom of its structure and delivers visual, auditory, and ...
A diffusion tensor imaging study". Journal of Psychiatric Research. 45 (2): 199-204. doi:10.1016/j.jpsychires.2010.05.006. PMID ... sexually aroused by the thought or image of themselves as a woman[30]), and as being either attracted to women, attracted to ... "Specific cerebral activation due to visual erotic stimuli in male-to-female transsexuals compared with male and female controls ... In another study, Rametti and colleagues used diffusion tensor imaging (DTI) to compare 18 androphilic male-to-female ...
The anatomical connections of the claustrum have been observed using DTI (diffusion tensor imaging). An fMRI scan looks at ... The visual claustrum is a single map of contralateral visual hemifield, receiving information based on motion in the visual ... Stained brain slice images which include the "Claustrum" at the BrainMaps project NIF Search - Claustrum via the Neuroscience ... Mapping from visual cortex to claustrum includes just a single map, which includes V1 and three other visual areas. Cells in ...
"Super-Resolution for Multislice Diffusion Tensor Imaging", Magnetic Resonance in Medicine, (2012) N. Zhao, Q. Wei, A. Basarab, ... These methods use other parts of the low resolution images, or other unrelated images, to guess what the high-resolution image ... It is also the mechanism underlying visual hyperacuity. Some object features, though beyond the diffraction limit, may be known ... Super-resolution imaging techniques are used in general image processing and in super-resolution microscopy. Because some of ...
An important example is diffusion tensor imaging, which relies on the restricted diffusion of water in tissue in order to ... Arthropods have a central brain with three divisions and large optical lobes behind each eye for visual processing. The brain ... Connectogram Outline of the human brain Outline of brain mapping List of regions in the human brain Medical image computing ... Diffusion Tensor Imaging Atlas of the Brain's White Matter Tracts. ...
Imfeld, A (2019). "White matter plasticity in the corticospinal tract of musicians: A diffusion tensor imaging study" (PDF). ... Whipple, GM (1910). "The effect of practice upon the range of visual attention and of visual apprehension". Journal of ... Gunter, Tracy D. (2014). "Can We Trust Consumers With Their Brains? Popular Cognitive Neuroscience, Brain Images, Self-Help And ...
A human neuroimaging study using diffusion tensor imaging revealed that the anterior insula is interconnected to regions in the ... Functional imaging studies show activation of the insula during audio-visual integration tasks. The anterior insula is part of ... Stained brain slice images which include the "insular cortex" at the BrainMaps project Thomas P. Naidicha; et al. (1 February ... Several functional imaging studies have also shown that the insula is activated when drug users are exposed to drug cues, and ...
Jiang, Y.; Johnson, G.A. (2010). "Microscopic Diffusion Tensor Imaging of the Mouse Brain". NeuroImage. 50 (2): 465-471. doi: ... Lucas, B.C.; Bogovic, J.A.; Carass, A.; Bazin, P.L.; Prince, J.L.; Pham, D.L.; Landman, B.A. (2010). "The Java Image Science ... Indeed - Visual Concepts GmbH selected the Bordeaux, France and San Diego, United States based company TGS, Inc. as the ... fiber-tracking from diffusion tensor imaging (DTI) data, skeletonization, spatial graph analysis, and stereoscopic rendering of ...
Diffusion Tensor Imaging, and Functional Magnetic Resonance Imaging Data Sets". Journal of Cognitive Neuroscience. 17 (4): 687- ... "IEEE Transactions on Image Processing. 15 (9): 2792-2804. doi:10.1109/tip.2006.877314. ISSN 1057-7149.. ... "Knowing with Which Eye We See: Utrocular Discrimination and Eye-Specific Signals in Human Visual Cortex". PLoS ONE. 5 (10): ...
... diffusion tensor technology (DTI), as well as histology and gene expression data derived from both microarray and in situ ... Experiments through the Observatory use visual or electrical readouts of neural activity as animals see different visual ... This highly comprehensive atlas integrates several kinds of data, including data collected by magnetic resonance imaging (MRI ... stimuli, ranging from natural images to black and white grid lines to a clip from the Orson Welles film noir, Touch of Evil. In ...
Basser PJ, Mattiello J, LeBihan D (January 1994). "MR diffusion tensor spectroscopy and imaging". Biophysical Journal. 66 (1): ... Landmark studies have included the areas and connections of the visual cortex of the macaque (Felleman and Van Essen, 1991) and ... 2011). To address the machine-vision and image-processing issues, the Open Connectome Project is alg-sourcing (algorithm ... The data sets were derived from diffusion spectrum imaging (DSI) (Wedeen, 2005), a variant of diffusion-weighted imaging that ...
... sensor Catadioptric sensor Chemoreceptor Compressive sensing Cryogenic particle detectors Dew warning Diffusion tensor imaging ... Electro-optical sensor Electrochemical fatigue crack sensor Fabry-Pérot interferometer Fisheries acoustics Image sensor Image ... array Sensor fusion Sensor grid Sensor node Soft sensor Sonar Staring array Transducer Ultrasonic sensor Video sensor Visual ... Interferometric Reflectance Imaging Sensor Laser beam profiler Littoral Airborne Sensor/Hyperspectral LORROS Millimeter wave ...
Cortical stimulation mapping Diffusion MRI (dMRI) - includes diffusion tensor imaging (DTI) and diffusion functional MRI (DfMRI ... Electrophysiological techniques for clinical diagnosis Functional magnetic resonance imaging (fMRI) Medical image computing ( ... see Visual N1, C1 and P1 (neuroscience)) in response to visual stimulation are of particular interest in studying sensitivity ... Fractional anisotropy a measure often used in diffusion imaging where it is thought to reflect fiber density, axonal diameter, ...
Diffusion Tensor)-MR Imaging ISO/IEC 16382:2000 Information technology - Data interchange on 12,7 mm 208-track magnetic tape ... Generic digital audio-visual systems - Technical Report on ISO/IEC 16500 - Description of digital audio-visual functionalities ... Preparation and visualization of RGB images to be used in RGB-based graphics arts workflows ISO/TR 16764:2003 Lifts, escalators ... Generic digital audio-visual systems ISO/IEC 16500-1:1999 Part 1: System reference models and scenarios ISO/IEC 16500-2:1999 ...
These include mixtures of diffusion tensors, Q-ball imaging, diffusion spectrum imaging and fiber orientation distribution ... annotate images, guide segmentation and registration processes, and control the visual representation of data (by controlling ... Typically, one image is treated as the target image and the other is treated as a source image; the source image is transformed ... "Spatial transformation of diffusion tensor magnetic resonance images" (PDF). IEEE Transactions on Medical Imaging. 20 (11): ...
Colin Webb Collective diffusion Collective dose Collective excitation Collective excitations Collider Collider Detector at ... Charge carrier Charge carrier density Charge conservation Charge contrast imaging Charge density Charge invariance Charge ... Contact angle Contact area Contact electrification Contact force Contact image sensor Contact mechanics Contact protection ... microwave background radiation Cosmic neutrino background Cosmic noise Cosmic ray Cosmic ray spallation Cosmic ray visual ...
A human neuroimaging study using diffusion tensor imaging revealed that the anterior insula is interconnected to regions in the ... Functional imaging studies show activation of the insula during audio-visual integration tasks.[9][10] ... Stained brain slice images which include the "insular cortex" at the BrainMaps project ... Functional imaging experiments have revealed that the insula has an important role in pain experience and the experience of a ...
Kenneth Ricciardi; Hospital Teacher in Neuroradiology, Expert in Diffusion tensor Tractography, with special interest in ... Upload images related to neuroscience *Our greatest need at the moment is for images, such as photos, figures, or drawings, ... Shushruth (contribs); Graduate student in visual neuroscience. Created the Neuroscience Portal and maintain it as schedule ... Image donations will be very much appreciated even if you don't make any other contribution to Wikimedia. If you have any ...
Diffusion MRI (dMRI) - includes diffusion tensor imaging (DTI) and diffusion functional MRI (DfMRI). dMRI is a recent ... Visual processing and image enhancementEdit. *Scientific visualization an interdisciplinary branch of science primarily ... Functional magnetic resonance imaging (fMRI). *Medical image computing (brain research of leads medical and surgical uses of ... Fractional anisotropy a measure often used in diffusion imaging where it is thought to reflect fiber density, axonal diameter, ...
... diffusion tensor, and functional magnetic resonance imaging.[142] These techniques are more specific for the disease than ... His symptoms began at age 28 with a sudden transient visual loss (amaurosis fugax) after the funeral of a friend. During his ... inside green box in the middle of the image; enhanced and marked by red arrow top-left corner)[140] ... "Magnetic Resonance Imaging Clinics of North America. 20 (4): 699-713. doi:10.1016/j.mric.2012.07.007. PMC 3479680. PMID ...
... a combined structural and diffusion tensor MRI study". Neuroscience Letters. 459 (1): 3-6. doi:10.1016/j.neulet.2008.07.056. ... Volume 36 in Computational Imaging and Vision, Springer, Dordrecht, 2007 *^ Ahmed Elgammal, Bodo Rosenhahn, and Reinhard Klette ... A series of images that represent research (left) and practice (right) in the field of Academic Kinesiology ... Marston, A (May 1967). "Self-reinforcement and external reinforcement in visual-motor learning". Journal of Experimental ...
The functional connectivity has been linked with structural connectivity through diffusion tensor imaging, which reveals white ... "Cortical networks involved in visual awareness independent of visual attention - Supporting Information" (PDF). Proceedings of ... The network is detectable through independent component analysis of resting state fMRI images, as well as seed based functional ...
Nucifora, P. G., Verma, R., Lee, S. K., & Melhem, E. R. (2007). Diffusion-tensor MR imaging and tractography: exploring brain ... Most studies have found no sex differences in short-term memory, the rate of memory decline due to aging, or memory of visual ... On average, women use more of the left cerebral hemisphere when shown emotionally arousing images, while men use more of their ... Women also show more consistency between individuals for the areas of the brain activated by emotionally disturbing images. A ...
Walsh-Hadamard transform Image compression Filter bank Gabor filter JPEG 2000 Adaptive filtering Visual perception Human visual ... Image denoising Image histogram Inpainting Histogram equalization Tone mapping Retinex Gamma correction Anisotropic diffusion ( ... pyramid Image segmentation Level-set method Markov random fields Medial axis Motion field Motion vector Multispectral imaging ... Epipolar geometry Fundamental matrix Pinhole camera model Projective geometry Trifocal tensor Active appearance model (AAM) ...
Fick's laws of diffusion Describe diffusion and were derived by Adolf Fick in 1855. They can be used to solve for the diffusion ... "little g's" as early as the 1940s of the Einstein tensor Gμν vs. the metric tensor gμν, Scientific, medical, and technical ... Focus In geometrical optics, a focus, also called an image point, is the point where light rays originating from a point on the ... This non-ideal focusing may be caused by aberrations of the imaging optics. In the absence of significant aberrations, the ...
... and diffusion tensor imaging. Imaging techniques allow scientists to observe physical changes in the brain and spinal cord, as ... Cajal's interpretations of the images produced by Golgi's staining technique led to the adoption of the neuron doctrine. ... for discoveries concerning the cerebral hemispheres specialization and the visual system respectively. Stanley Cohen and Rita ... biochemical approaches and imaging techniques such as magnetic resonance imaging, computed tomography angiography, ...
They determine the tract of nerve fibers within the brain by means of diffusion tensor imaging or diffusion-spectrum imaging (e ... and recent MR imaging studies with fossils suggest that the method may be used to image at least a subset of fossilized brains ... One study found that juggling novices showed a bilateral gray matter expansion in the medial temporal visual area (also known ... and fiber tracking based on diffusion-weighted imaging (DTI or DSI). All four are usually performed based on Magnetic Resonance ...
Log-Euclidean Metrics for Fast & Simple Calculus on Diffusion Tensors. Magnetic Resonance in Medicine, 56(2):411-421, 2006. O. ... he has been engaged in pioneering research in the field of computer analysis of medical images, image-guided therapy and ... on Medical Imaging, 24 (10), 1334-1346, 2005. N. Ayache (dir., with J-L. Lions and P. Ciarlet). Computational Models for the ... navigation from visual maps). Since 1988, ... on Medical Imaging, 2012 N. Ayache, H. Delingette, and M. ...
"Diffusion tensor imaging". Radiopaedia. Retrieved 2017-10-13. Chua TC, Wen W, Slavin MJ, Sachdev PS (February 2008). "Diffusion ... The MR imaging provides quantitative, real-time, thermal images of the treated area. This allows the physician to ensure that ... An MRI artifact is a visual artifact, that is, an anomaly during visual representation. Many different artifacts can occur ... Liu CH, You Z, Liu CM, Kim YR, Whalen MJ, Rosen BR, Liu PK (March 2009). "Diffusion-weighted magnetic resonance imaging ...
... and diffusion tensor imaging (for mapping white matter tracts within the living brain). Whereas structural MRI and CAT scanning ... It allowed them to construct images reflecting brain activation from speaking, reading, visual or auditory perception and ... At first, structural imaging benefited more than functional imaging from the introduction of MRI. During the 1980s a veritable ... Multimodal imaging combines existing brain imaging techniques in synergistic ways which facilitate the improved interpretation ...
Neurolinguists used a diffusion tensor imaging (DTI) scanning method to determine the white matter intensity between ... more effective visual search, and faster response time for visual targets compared to hearing individuals. Altered visual ... Stratton GM (1896). "Some preliminary experiments on vision without inversion of the retinal image". Psychological Review. 3 (6 ... Researchers nowadays use multiple cross-sectional imaging methods (i.e. magnetic resonance imaging (MRI), computerized ...
... parallel imaging; 80 diffusion-encoding gradient directions; 1 B0 image; b=1000 s/mm2; matrix size, 128 × 128; voxel size, 1.8 ... Whole-Brain Diffusion Tensor Imaging in Correlation to Visual-Evoked Potentials in Multiple Sclerosis: A Tract-Based Spatial ... Whole-Brain Diffusion Tensor Imaging in Correlation to Visual-Evoked Potentials in Multiple Sclerosis: A Tract-Based Spatial ... Whole-Brain Diffusion Tensor Imaging in Correlation to Visual-Evoked Potentials in Multiple Sclerosis: A Tract-Based Spatial ...
Åbent Eddy korrigeret diffusion-vægtede billeder i DSI Studio 24 ved at klikke på Trin 1: Open Source Images. Load bvec og bval ... Måling Forbindelse i Primary Visual Pathway i Human albinisme Brug Diffusion Tensor Imaging og traktografi. doi: 10.3791/53759 ... Diffusion tensor imaging (DTI) scanninger blev erhvervet med 64 diffusion retninger. Både deterministiske og probabilistiske ... Measuring Connectivity in the Primary Visual Pathway in Human Albinism Using Diffusion Tensor Imaging and Tractography. J. Vis ...
The visual analysis of DWI and ADC trace images is not included in this study. ... A comparison of images generated from diffusion-weighted and diffusion-tensor imaging data in hyper-acute stroke. J Magn Reson ... Clinical applications of diffusion tensor imaging. J Magn Reson Imaging.2004;19 :6- 18. ... The Normal Neonatal Brain: MR Imaging, Diffusion Tensor Imaging, and 3D MR Spectroscopy in Healthy Term Neonates ...
Keywords: image processing • visual impairment: neuro-ophthalmological disease • imaging methods (CT, FA, ICG, MRI, OCT, RTA, ... Methods: : Diffusion tensor Imaging (DTI) brain scans of 59 subjects were acquired. The subjects were categorized into two age ... Glaucoma Classification based on Diffusion Tensor Imaging Derived Measures in the Optic Radiation ... Glaucoma Classification based on Diffusion Tensor Imaging Derived Measures in the Optic Radiation ...
Diffusion-weighted imaging (DWI) allows for the assessment of white-matter properties in the brain and shows promise as a ... Diffusion-weighted imaging (DWI) allows for the assessment of white-matter properties in the brain and shows promise as a ... Surrounding voxels are filled with red for visual purposes only. Images are in neurological orientation and Z-coordinates are ... A review of magnetic resonance imaging and diffusion tensor imaging findings in mild traumatic brain injury. Brain Imaging ...
... use black and white or color with intensity values to map the complex multidimensional DTI data to a two-dimensional image. ... Diffusion tensor imaging (DTI) data has traditionally been displayed as a grayscale functional anisotropy map (GSFM) or color ... and right-eye retinal images in his visual system (Figure 2). In theory, stereoscopic perceptions (VMS) can be generated by ... Diffusion tensor imaging (DTI) is a magnetic resonance (MR) imaging technique that enables the quantitative measurement of ...
Diffusion tensor imaging (DTI) is a promising method for characterizing microstructural changes or differences with ... Basser PJ, Pierpaoli C. A simplified method to measure the diffusion tensor from seven MR images. Magn Reson Med 1998; 39: 928- ... MR tractography predicts visual field defects following temporal lobe resection. Neurology 2005;65: 596-599. ... apparent diffusion coefficient and diffusion anisotropy measured by using diffusion tensor MR imaging. Radiology 1998; 209: 57- ...
36 We acquired 7 images per axial section, including a T2-weighted reference image (b = 0 seconds/mm2) and 6 diffusion-weighted ... Visual function in term infants with hypoxic-ischaemic insults: correlation with neurodevelopment at 2 years of age. Arch Dis ... MR Imaging, MR Spectroscopy, and Diffusion Tensor Imaging of Sequential Studies in Neonates with Encephalopathy. A.J. Barkovich ... MR Imaging, MR Spectroscopy, and Diffusion Tensor Imaging of Sequential Studies in Neonates with Encephalopathy ...
... is a newly developed magnetic resonance imaging (MRI) technique that analyzes the anatomy of nerve cells and a complex neuronal ... Representation of DT Images. The information obtained from the tensor is either condensed into one number (scalar) or 4 numbers ... a visual representation of data obtained from a region of crossing fibers can be confusing. ... Diffusion Tensor Imaging (DTI) Explained. News-Medical. ...
Diffusion tensor magnetic resonance imaging reveals visual pathway damage that correlates with clinical severity in glaucoma. ... was used to process diffusion-weighted images. First, diffusion-weighted images were affine-registered to the T1-weighted MRI ... as well as diffusion tensor imaging (DTI) using 3.0-Tesla magnetic resonance imaging. Fractional anisotropy (FA), mean ... In vivo diffusion tensor imaging of the human optic nerve: pilot study in normal controls. Magn Reson Med. 2006; 56: 446-451. ...
Høyoppløselig Structural Magnetic Resonance Imaging of Human subcortex ... Måling Tilkobling i Primær Visual Pathway i Human albinisme Bruke Diffusion Tensor Imaging og Tractography, ... Måling Tilkobling i Primær Visual Pathway i Human albinisme Bruke Diffusion Tensor Imaging og Tractography. Anahit Grigorian1, ... Høyoppløselig Structural Magnetic Resonance Imaging of Human subcortex. Larissa McKetton1, Joy Williams2, Joseph D. Viviano1, ...
In addition, we measured retinal nerve fibre layer thickness, visual evoked potential amplitude, optic radiation lesion load, ... Serial Diffusion Tensor Imaging of the Optic Radiations after Acute Optic Neuritis. Scott C. Kolbe,1,2 Anneke van der Walt,1,3 ... Previous studies have reported diffusion tensor imaging (DTI) changes within the optic radiations of patients after optic ... 6Monash Biomedical Imaging, Monash University, Clayton, VIC 3800, Australia. Received 11 May 2016; Revised 6 July 2016; ...
Diffusion tensor imaging in cases with visual field defect after anterior temporal lobectomy. ... Identification of pre- and postcentral gyri on CT and MR images on the basis of the medullary pattern of cerebral white matter. ... by diffusion tensor tractography.. Taoka T, Iwasaki S, Sakamoto M, Nakagawa H, Fukusumi A, Myochin K, Hirohashi S, Hoshida T, ... Magnetic resonance plaque imaging to predict the occurrence of the slow-flow phenomenon in carotid artery stenting procedures. ...
Image acquisition.. Imaging data were acquired on a 3T Trio MRI (Siemens Medical Solutions). Diffusion-weighted images were ... The diffusion and kurtosis tensors were used to derive 3D maps of faxon, Daxon, ADextra, and RDextra. Diffusion tensor data ... Ten nonweighted diffusion images (b = 0 s/mm2) were also collected. A field map image coplanar to the diffusion acquisition was ... 2002) Processing and visualization for diffusion tensor MRI. Med Image Anal 6:93-108, doi:10.1016/S1361-8415(02)00053-1, pmid: ...
Diffusion tensor imaging (DTI) and fiber tractography may prove useful in clinical neuroradiology practice in several ... 3 diffusion-weighted images with diffusion-weighted gradient pulses in orthogonal directions may be obtained and ADC calculated ... 15 Clinical features vary and may involve the motor, sensory, cognitive, and visual pathways. Although the pathologic ... Obtaining the diffusion tensor Anisotropic diffusion may be decribed in terms of an ellipsoid tensor. The tensor consists of 3 ...
2003) How to correct susceptibility distortions in spin-echo echo-planar images: application to diffusion tensor imaging. ... TVA assumes that visual processing starts with parallel matching of stimuli to representations in visual long-term memory. This ... 2008) A diffusion tensor imaging tractography atlas for virtual in vivo dissections. Cortex 44:1105-1132, doi:10.1016/j.cortex. ... 2002) Imaging cortical association tracts in the human brain using diffusion-tensor-based axonal tracking. Magn Reson Med 47: ...
Microfluidic laminate-based phantom for diffusion tensor-magnetic resonance imaging. R. Samuel, H.J. Sant, F. Jiao, C.R. ... These techniques, combined with a visual user interface, enable users to quickly segment whole neurons in large volumes. ... Diffusion Tensor Analysis. Chris Johnson. Diffusion Tensor Analysis. Image Analysis Project Sites:. *Model-Based Reconstruction ... We apply this framework to the study of early maturation in white matter regions as measured with diffusion tensor imaging (DTI ...
Our goal was to determine if visual cortex is reorganized in these mice, and to examine the neuroanatomical connections that ... Our goal was to determine if visual cortex is reorganized in these mice, and to examine the neuroanatomical connections that ... We found that most neurons in V1 responded to auditory, or some combination of auditory, somatosensory, and/or visual ... We found that most neurons in V1 responded to auditory, or some combination of auditory, somatosensory, and/or visual ...
Two recently published studies examine the role that diffusion tensor imaging (DTI) may play in the management of patients with ... They followed for at least six months 25 individuals who presented within 31 days after experiencing acute visual symptoms ... Two recently published studies examine the role that diffusion tensor imaging (DTI) may play in the management of patients with ... They demonstrated that decreased diffusivity in acute optic neuritis was associated with worse six-month visual outcome and ...
When Diffusion Tensor Imaging (DTI) is used in clinical studies, statistical hypothesis testing is the standard approach to ... Brain MR images are one of the most important instruments for diagnosing neurological disorders such as tumors, infections or ... Interactive Formation of Statistical Hypotheses in Diffusion Tensor Imaging  Abbasloo, Amin; Wiens, Vitalis; Schmidt-Wilcke, ... VCBM 19: Eurographics Workshop on Visual Computing for Biology and Medicine * Browsing VCBM 19: Eurographics Workshop on Visual ...
... functional magnetic resonance imaging (fMRI), and diffusion tensor imaging (DTI). The behavioral measures have focused on ... Magnetic Resonance Imaging, Memory, Nerve Fibers, Myelinated, Neural Pathways, Pattern Recognition, Visual, Perception, Visual ... DTI is a recently developed technique that images the structural integrity of white matter. The white matter tracts of the ... Madden, DJ; Bennett, IJ; Burzynska, A; Potter, GG; Chen, N-K; Song, AW, Diffusion tensor imaging of cerebral white matter ...
McIntosh calls up a gorgeous DTI image on his computer, the rendering from the reporters diffusion tensor imaging. Its ... The images from the EEG are wholly different, a pulsing electricity as the visual cortices light up when new information comes ... The EEG cap is then removed and then its back into the machine for a further 20 minutes of diffusion tensor imaging, which ... FIFTY SHADES OF GREY MATTER At left, the peacock-hued results of diffusion tensor imaging during the MRI that reveal white ...
Diffusion tensor imaging, functional magnetic resonance imaging and computational modeling of visual perception and brain ... Bio My group develops technologies for advanced x-ray and CT imaging, including novel system design, model-based image ... We combine quantitative organism-wide fluorescence imaging (deep imaging), functional genomics (deep sequencing), and ... Current Research and Scholarly Interests Models and measures of the human visual system. The brain pathways essential for ...
2010) who used diffusion tensor magnetic resonance imaging to trace the amount of water flow throughout the brain. This region ... Coull, J.T., Frith, C.D., Frackowiak, R.S.J., & Grasby, P.M. (1996). A fronto-parietal network for rapid visual information ... and multiple images in recognition of wanted persons. Journal of Police and Criminal Psychology.. ... Lesion symptom analysis using diffusion tensor imaging. BMC Neuroscience, 11, 147-154. ...
Using an imaging technique called diffusion tensor imaging, Romke Rouw and Steven Scholte demonstrated that grapheme-colour ... have more neuronal connections between a variety of brain areas traditionally associated with visual perception, such as the ...
Optic Radiation Diffusion Tensor Imaging Tractography: An Alternative and Simple Technique for the Accurate Detection of ... The suprasellar volume of nonfunctioning pituitary adenomas: a useful tool for predicting visual field deficits.. Authors:. ... Conclusions: Patients with a poorly pneumatized SS can be treated safely with a transsphenoidal approach using image guidance ... Defining its exact anatomy and accurately identifying its position remain challenging, even with diffusion tensor imaging (DTI ...
The goal of this was to explore diffusion abnormalities in relapsing remitting multiple sclerosis, and whether such image-based ... suggest sustained tensor term thirty threshold tissue tool tract tracts twenty understanding underwent vegetative verbal visual ... Diffusion Tensor Imaging Abnormalities Associated with Cognitive Decline in Relapsing-Remitting Multiple Sclerosis. Hui Jing Yu ... increased mean diffusion was driven by increased radial diffusivity. Significant correlations were observed between abnormal FA ...
... showed how diffusion-tensor imaging could be combined with lesion experiments to determine pathways in the marmoset visual ... measurements of the inhibitory neurotransmitter GABA in spontaneously impulsive rats and introduced a new initiative to image ... He gave an account of new methodology, including convection imaging, photoacoustic imaging and studies of the so-called " ... Dr Aneurin Kennerley from Sheffield University gave an overview of their facility and discussed how optical imaging could be ...
A diffusion tensor imaging study on the auditory system and tinnitus. A Crippa, CP Lanting, P Van Dijk, JBTM Roerdink ... Denoising functional MR images: a comparison of wavelet denoising and Gaussian smoothing. AM Wink, JBTM Roerdink ... On the generality of crowding: Visual crowding in size, saturation, and hue compared to orientation. R Van den Berg, JBTM ... A review of wavelet denoising in MRI and ultrasound brain imaging. A Pizurica, AM Wink, E Vansteenkiste, W Philips, JBTM ...
... the left hemisphere of an aye-aye brain using t2-weighted structural magnetic resonance imaging and diffusion-tensor imaging ... We acquired magnetic resonance images (MRI) of the brain of an adult African elephant, Loxodonta africana, in the axial and ... This trade-off between visual and olfactory reliance is a reflection of the nocturnal extractive foraging behavior practiced by ... between fiber spread as measured from histological sections and fiber spread as measured from diffusion-tensor imaging. ...
We also applied it to real functional Magnetic Resonance Imaging (fMRI)-Diffusion Tensor Imaging (DTI) and structural MRI ... functional and diffusion-weighted DICOM images in schizophrenia patients and sex and age-matched controls are now accessible to ... Specifically, the visual cortex in fMRI, the anterior thalamic radiation (ATR) and forceps minor in DTI, and the parietal ... The current study examined the relationship between white matter integrity as indexed by diffusion tensor imaging and negative ...
Using diffusion tensor imaging (DTI) from the Human Connectome Project, the project will investigate quantifiable ... Reproducible Visual Analysis of Multivariate Networks with Multinet Reproducible Visual Analysis of Multivariate Networks with ... We propose an image-space contrast enhancement method for color-encoded visualization. The contrast of an image is enhanced ... Such tube primitives are widely used in scientific visualization to represent diffusion tensor imaging tractographies, neuron ...
... lesion segmentation based on multiple modalities including T1-weighted and T2-weighted images as well as diffusion tensor-based ... The Visual Computing Lab is a research group within the Computer Science department which is directed by Dr. The mission of the ... Research on medical imaging is done in conjunction with researchers in the radiology department at the university of Chicago ... BIOMEDICAL SIGNAL AND IMAGE PROCESSING. 17-May-2020 11:29. Reply Image processing can be defined as the manipulation of an image ...
Further, microstructural level investigation should be supplemented by diffusion tensor imaging and tractography or other ... This finding also supports the cortico-cortical mechanism for the visual association cortex and other sensory areas, which may ... As an alternative, the magnetic resonance image (MRI) relaxation time constant (T1ρ) was measured in brains of Alzheimers ... "The need of an early and noninvasive diagnosis of AD requires the development of imaging-based techniques. ...
Diffusion tensor imaging and behavior in premature infants at 8 years of age, a randomized controlled trial with long-chain ... showed that in infants who have supplemented formula there is an increase in growth/weight and visual function as opposed to ... images, and videos. (Privacy Policy). ... visual function and healthy blood pressure have been recorded ... DHA is recognized as essential for normal brain function and is important for optimal visual development in infants [9]. ...
Anisotropic osmosis filtering for shadow removal in images. *Diffusion tensor imaging with deterministic error bounds ... for visual computing applications, and we adapt it specifically to shadow removal applications. We show that in the integrable ... Anisotropic osmosis filtering for shadow removal in images [link to software] [link to paper] Researchers: Simone Parisotto, ... we estimate the local structure via a modified tensor voting approach and use this information within an anisotropic diffusion ...
Motor skill learning induces brain network plasticity: A diffusion-tensor imaging study. PLoS One. 2019;14(2):e0210015. ... Area 4 is also implicated in fine motor movements and potentially plays a role in visual learning of motor-based skills early ... A 2012 study35 presented participants with images of their own hand and the hand of a stranger. The representation of a ... Areas 6ma and 6mp are activated when individuals receive visual instruction cues. Area SCEF is a higher-order oculomotor center ...
Whole brain white matter histogram analysis of diffusion tensor imaging data detects microstructural damage in mild cognitive ... A Comprehensive Visual Rating Scalefor predicting progression to dementia in patients with mild cognitive impairment Jang, ... KIKI‐net: cross‐domain convolutional neural networks for reconstructing undersampled magnetic resonance images T. Eo, Y. Jun, T ... 2018; Journal J Magn Reson Imaging; doi:10.1002/jmri.25947 Defining SNAP by cross-sectional and longitudinal definitions of ...
... mild cognitive impairment and Alzheimers disease based on multicenter diffusion tensor imaging. J Neurol 266, 10 (2019), 2465- ... Supporting Activity Recognition by Visual Analytics. In IEEE Conference on Visual Analytics Science and Technology (VAST), 41- ... Combining off-the-shelf Image Classifiers with Transfer Learning for Activity Recognition. In Proceedings of the 5th ... classification of multimodal multicenter diffusion-tensor and magnetic resonance imaging data. Journal of Neuroimaging 25, 5 ( ...
... connectivity based on tensor-based morphometry and volumetric white matter parcellations based on diffusion tensor imaging. ... Medical Image Computing and Computer-Assisted Intervention, 16(1), 300-307.. Hanson, J.L., Hair, N., Shen, D.G., Shi, F., ... Evans, J.L., Selinger, C., & Pollak, S.D. (2011). P300 as a measure of processing capacity in auditory and visual domains in ... Integrative structural brain network analysis in diffusion tensor imaging. Brain Connectivity, 7(6): 331-346. [PubMed Central ...
Direct Glyph-based Visualization of Diffusion MR Data Using Deformed Spheres -- Visual Analysis of Bioelectric Fields -- MRI- ... Visualization of Multi-channel Medical Imaging Data -- Multimodal Image Registration for Efficient Multi-resolution ... Vector and Tensor Visualization in Medical Applications -- Global Illumination of White Matter Fibers from DT-MRI Data -- ... Direct Glyph-based Visualization of Diffusion MR Data Using Deformed Spheres -- Visual Analysis of Bioelectric Fields -- MRI- ...
SkillsDiffusion Tensor Imaging, Biomedical Imaging, MEG, Higher order diffusion..., Computer Vision, Image Analysis, Medical ... Visual Studio, WCF, ASP.NET, ADO.NET, Oracle, SSRS, XSLT, jQuery, jQuery UI, REST, C#, JSON, Software Development, Integration ... Digital Imaging, Clinical Trials, Research, Machine Learning, Algorithms, Neuroscience, Image Processing, LaTeX, Pattern ... Visual Basic, Object Oriented Design, Requirements Gathering, DHTML, HTML 5, Dallas/Fort Worth AreaSr. The school is among the ...
White matter alterations in adults with probable developmental coordination disorder: An MRI diffusion tensor imaging study. ... 2006). Motor, visual and egocentric transformations in children with developmental coordination disorder. Child: Care, Health ... The relationship between friendship factors and adolescent girls body image concern, body dissatisfaction, and restrained ... An MRI diffusion tensor imaging study. NeuroReport. 28(2), pp. 87 - 92. ...
Keywords: Alzheimers disease, brain, diffusion tensor imaging, iron, magnetic resonance imaging, mild cognitive impairment, ... The Benton Visual Retention Test (in the CHS) and Reys Auditory Verbal Learning Test (in the LASA) were used …to assess visual ... Eigenface is only for 2D image processing and is not suitable for volumetric image processing since faces are usually obtained ... Keywords: Alzheimers disease, diffusion tensor imaging, disconnection hypothesis, magnetic resonance imaging, mild cognitive ...
White matter alterations in adults with probable developmental coordination disorder: An MRI diffusion tensor imaging study. ... 2016) Working memory binding of visual object features in older adults. Neuropsychology, Development and Cognition. Section B: ... The relationship between friendship factors and adolescent girls body image concern, body dissatisfaction, and restrained ... An MRI diffusion tensor imaging study. NeuroReport. 28(2), pp. 87 - 92. ...
PURPOSE: To assess the effect on diffusion tensor (DT) magnetic resonance imaging (MRI) of acquiring data with different ... The aim of this study was to analyse the effect of image registration on interobserver agreement in the visual detection of ... Background: In multiple sclerosis (MS), diffusion tensor and magnetisation transfer imaging are both abnormal in lesional and ... A magnetisation transfer and diffusion tensor imaging study ~ Özgur Yaldizli, et al.. ...
A diffusion tensor imaging tractography atlas for virtual in vivo dissections. M CATANI, M THIEBAUTDESCHOTTEN. Cortex. 2008-09- ... Visual neglect in posterior cortical atrophy. Katia Andrade, Dalila Samri, Marie Sarazin, Leonardo C de Souza, Laurent Cohen, ... Deformable anatomic templates embed knowledge into patients brain images: Part 1. construction and display. L. Anne Hayman, ... Traumatic brain injury and the frontal lobes: What can we gain with diffusion tensor imaging?. Giuseppe Zappalà, Michel ...
Ten: for estimating, processing, and visualizing diffusion tensor fields, including fiber tractography methods.. More ... Image Analysis. AtlasWerks. AtlasWerks is an open-source (BSD license) software package for medical image atlas generation. ... Pathfinder is a visual analysis tool for the exploration of paths in large networks that was built with Caleydo Web.. The ... Scientific Computing and Imaging Institute. 72 S Central Campus Drive, Room 3750. Salt Lake City, UT 84112. Phone: 801-585-1867 ...
Ten: for estimating, processing, and visualizing diffusion tensor fields, including fiber tractography methods.. More ... Image Analysis. AtlasWerks. AtlasWerks is an open-source (BSD license) software package for medical image atlas generation. ... Pathfinder is a visual analysis tool for the exploration of paths in large networks that was built with Caleydo Web.. The ... Scientific Computing and Imaging Institute. 72 S Central Campus Drive, Room 3750. Salt Lake City, UT 84112. Phone: 801-585-1867 ...
Diffusion Tensor Imaging of the Brain in Pain ,. *Recent Advanced in Deep Learning: Learning Structured, Robust, and Multimodal ... DRASTIC: Dynamically Recongurable Architecture Systems for Time-varying Image Constraints ,. *Introduction to NIAID and Imaging ... Title: Visual Adaptation and the Natural Visual Environment ,. *Title: Bridging the gap between neuroscience and psychiatry: ... Retinal Image Analysis: Methods and Challenges ,. *Extending Models of Decision Making: Neural Systems and Patient Predictions ...
Diffusion Tensor Imaging of the Brain in Pain ,. *Recent Advanced in Deep Learning: Learning Structured, Robust, and Multimodal ... DRASTIC: Dynamically Recongurable Architecture Systems for Time-varying Image Constraints ,. *Introduction to NIAID and Imaging ... Title: Visual Adaptation and the Natural Visual Environment ,. *Title: Bridging the gap between neuroscience and psychiatry: ... Retinal Image Analysis: Methods and Challenges ,. *Extending Models of Decision Making: Neural Systems and Patient Predictions ...
diffusion tensor imaging * elevated diaphragm * Entrepreneur * facial colliculus syndrome * FAT measurement * fetal biometry ... Home aipg new pattern dams sky dams visual treat DVT DAMS Conducts Largest Session for PG Medical Aspirants in History in India ... This is a chest CT image of a young male with fever, recurrent cough. CT chest shows well defined area in left lower lobe with ... NBE has introduced FNB for Interventional Radiology, Breast imaging and Body Imaging. ...
  • Diffusion tensor imaging and fiber tractography may prove useful in clinical neuroradiology practice, with application to several categories of disease. (
  • B) Tractography findings overlaid onto structural echo planar image, showing white matter connectivity to occipital and frontal areas. (
  • In this study the authors tested the value of visual pathway tractography in comparison with visual field and visual acuity analyses. (
  • Visual pathway DTI tractography was performed preoperatively, intraoperatively immediately after tumor resection, and 1 week and 3 months after surgery. (
  • In the control group, pre- and postoperative visual status were normal and visual pathway tractography revealed fibers crossing the optic chiasm without any alteration. (
  • To demonstrate the role of diffusion tensor tractography (DTT) in preoperative mapping of eloquent tracts in relation to cerebral tumors and to determine whether it is helpful for neurosurgical planning and postoperative assessment. (
  • Furthermore, we provide initial evidence that diffusion tensor imaging tractography may provide clinically unique information for predicting neuropsychological status in patients with epilepsy. (
  • This method was combined with high-resolution tractography and provides scientists with better estimates of the hard-wired connections between brain regions and increased accuracy over conventional tractography methods, such as those typically used with diffusion tensor imaging. (
  • Although the amount of scar on LGE MRI months after ablation correlates with procedure outcomes, early imaging predictors of scar remain elusive. (
  • Optic neuritis (ON) is a common manifestation of MS with correlates of inflammation and neurodegeneration measurable within the visual pathways. (
  • Diffusion tensor imaging (DTI) data has traditionally been displayed as a grayscale functional anisotropy map (GSFM) or color coded orientation map (CCOM). (
  • The organization and connections of the primary visual area (V1) were examined in mice that lacked functional rods ( Gnat −/−), but had normal cone function. (
  • My research foucses primarily on the cognitive neuroscience of aging: the investigation of age-related changes in perception, attention, and memory, using both behavioral measures and neuroimaging techniques, including positron emission tomography (PET), functional magnetic resonance imaging (fMRI), and diffusion tensor imaging (DTI). (
  • Madden DJ, Langley LK, Denny LL, Turkington TG, Provenzale JM, Hawk TC & Coleman RE, Adult age differences in visual word identification: functional neuroanatomy by positron emission tomography , Brain Cogn. (
  • Aim Structural and functional imaging techniques were combined to investigate sensory system function in amyotrophic lateral sclerosis (ALS). (
  • Methods Functional MRI (fMRI) was used to investigate cortical activity during visual, auditory and somatosensory stimulation in 14 ALS patients and 18 control subjects. (
  • Assessing such effective connectivity (EC) across brain states using functional magnetic resonance imaging (fMRI) alone has proven difficult, however. (
  • We will collect structural (T1), functional (visual task and motor task), and magnetic resonance spectroscopy (MRS) data. (
  • The neuroimaging techniques available to observe ongoing brain activity during human cognition include functional magnetic resonance imaging, positron emission tomography, event‐related potentials, magnetoencephalography and event‐related optical signalling. (
  • Functional imaging provides methods of assessing specific brain operations by indirectly measuring the physiological changes that occur during cognition. (
  • Buxton RB (2002) Introduction to Functional Magnetic Resonance Imaging: Principles and Techniques. (
  • Secondary outcome measures on brain MRI will include cortical volume, diffusion-weighted imaging, resting state functional MRI, MR spectroscopy and magnetisation transfer ratio. (
  • In total, twelve patients with ON (four males and eight females) and twelve (four males and eight females) age-, sex-, and education-matched healthy controls underwent resting-state functional magnetic resonance imaging scans. (
  • Typical examples range from Diffusion Tensor Imaging (DTI), functional Magnetic Resonance Imaging (fMRI) to microbiological images produced by confocal microscopy. (
  • The DTI images can be overlaid with structural and functional MRI images, providing a hybrid map showing topography layered with a road map," said lead author and neurosurgery resident Kalil Abdullah, MD . "This rendering gives us increased clarity to visualize important white matter tracts in the brain and adapt our surgical approaches to each person's case. (
  • Success and failure of controlling the real-time functional magnetic resonance imaging neurofeedback signal are reflected in the striatum. (
  • Tracking perceptual decision mechanisms through changes in interhemispheric functional connectivity in human visual cortex. (
  • Amygdala response and functional connectivity during cognitive emotion regulation of aversive image sequences. (
  • The sum of the above-mentioned microscopic and mesoscopic brain alterations, whether functional or structural in nature, can be measured in vivo by using a variety of magnetic resonance imaging (MRI) techniques [ 3 ]. (
  • Wernicke's area) localized with functional magnetic resonance imaging. (
  • We examined whether functional and structural variability in the primary visual area (V1) correlated with autism traits. (
  • The average functional activation in V1 to visual stimulation and its average grey-matter thickness were calculated. (
  • replication cohort: children with autism spectrum disorder n = 17, typically developing children n = 17), using high angular resolution diffusion-weighted imaging and functional MRI data. (
  • I am investigating these issues with functional magnetic resonance imaging (fMRI), structural magnetic resonance imaging (MRI) and diffusion tensor imaging (DTI). (
  • I began the Four-Year Integrated PhD in Neuroscience in the Trinity College Institute of Neuroscience (TCIN) in September 2007, and following several short research projects in the first year I choose to undertake my doctorate in functional magnetic resonance imaging (fMRI) under the supervision of Dr. Arun Bokde. (
  • I have continued to work within this study and am currently involved in functional magnetic resonance imaging (fMRI) as well as neuropsychological data. (
  • They first used several different functional brain scans to identify regions in the brain responsible for visual processing and attention. (
  • Then, the researchers combined the results with those from the functional experiments to show how white matter fibers tracked from the regions determined previously, the visual cortex and the parietal cortex. (
  • The present study examined the applicability of brain functional magnetic resonance imaging (fMRI) and diffusion tensor imaging (DTI) to sheep using a clinical MR scanner (3 tesla) with a head coil. (
  • Results During visual stimulation, fMRI demonstrated a decreased response in secondary visual areas in ALS, possibly related to demyelination of sensory nerve fibres. (
  • An fMRI study of visual hemifield integration and cerebral lateralization. (
  • A) Significant anterior temporal IED-related fMRI activations SPM{T} overlaid onto structural echo planar image (b = 0), showing left temporal and bilateral occipital fMRI activations. (
  • Interest may be in revealing tissue borders or discontinuities in the image as in PET, in determing anisotropy for fiber detection with DTI, or in detection of activated regions when studying brain function by fMRI experiments. (
  • Visual analysis of 3D neuroimaging modalities such as fMRI, MRI and DTI brain imaging is a significant component in research and clinical practice. (
  • We are developing computational techniques for automated analysis, interpretation, and visualization of brain structure and function in fMRI, MRI and DTI brain imaging data. (
  • The main research tools I use are fMRI and diffusion tensor imaging (DTI), as well as behavioural and neuropsychological tests. (
  • The blood-oxygenation-level-dependent (BOLD) fMRI was performed on anesthetized sheep during the block-based presentation of external tactile and visual stimuli using gradient echo-planar-imaging (EPI) sequence. (
  • Basser PJ, Mattiello J, LeBihan D. MR diffusion tensor spectroscopy and imaging. (
  • The results of sequential MR imaging studies-including anatomic MR imaging, proton MR spectroscopy, and diffusion tensor imaging (DTI)-of 10 patients enrolled prospectively in a study of neonatal encephalopathy are reported to help to clarify the time course of changes in different brain regions during the first 2 weeks of life. (
  • The MR examination included spin-echo T1 and T2-weighted images, DTI, and long echo time (288 milliseconds) proton MR spectroscopy. (
  • Although the anatomic images were normal or nearly normal on the first 2 days after birth in most patients, abnormalities were detected on DTI (both visually and by quantitative interrogation of D av maps) and proton MR spectroscopy (abnormal metabolite ratios). (
  • Patterns of injury detected by standard anatomic imaging sequences, DTI sequences, and proton MR spectroscopy varied considerably during the first 2 weeks after injury. (
  • During the past 15 years, MR techniques-including MR imaging, diffusion tensor imaging (DTI), and proton MR spectroscopy-have become the tools of choice in the study of brain injury in term neonates. (
  • As part of a prospective study of MR in perinatal and neonatal brain injury, 10 patients have been studied sequentially by standard MR imaging, DTI, and proton MR spectroscopy in the early postnatal period, with the first examination being performed in the first 48 hours in all cases. (
  • Basser PJ, Mattiello J and Le Bihan D (1994) MR diffusion tensor spectroscopy and imaging. (
  • Fractional anisotropy, radial diffusivity, and axial diffusivity were calculated and correlated with mean P100 visual-evoked potentials by tract-based spatial statistics. (
  • Significant negative correlations between mean P100 visual-evoked potentials and fractional anisotropy and significant positive correlations between mean P100 visual-evoked potentials and radial diffusivity were found widespread over the whole brain. (
  • The apparent diffusion coefficient (ADC), axial and radial (RD) diffusivities, as well as fractional anisotropy were derived from the diffusion tensor and used to characterize the selected ROI. (
  • In order to simplify this tensor dataset for display on a 2D grayscale image, grayscale fractional anisotropy (GSFA) maps are often constructed (Figure 1(a) ). (
  • Diffusion parameters (diffusivity [D av ], fractional anisotropy [FA], and individual eigenvalues) were calculated for 10 1-cm 2 regions of interest in each hemisphere that were placed based on anatomic landmarks. (
  • Two main parameters that are calculated from the tensor to define the nerve cell orientation are fractional anisotropy (FA) and mean diffusivity (MD). FA defines the degree of diffusion directionality, and MD provides the information on the average diffusivity of water. (
  • DTI measures, such as fractional anisotropy (FA), quantify water molecules' microscopic diffusion and reflect a variety of microstructural features, among them the degree of myelination and fiber density and coherence. (
  • Fractional anisotropy provides a quantitative measure of the degree of diffusion anisotropy. (
  • Optimized tract-based spatial statistics was employed to examine the between group differences in DTI measures including fractional anisotropy (FA), mean diffusivity (MD), axial diffusivity (AD), and radial diffusivity (RD). Visual analogue scale (VAS) was used to rate the intensity of the abdominal pain at periovulation and menstruation. (
  • Our primary outcomes will be changes in 1) pain, measured with the Visual Analogue Scale, 2) brain structure and networks, measured by fractional anisotropy (brain structure) and the blood-oxygen-level dependent signal (brain networks). (
  • DTI was acquired using 26 differential magnetic gradient directions to derive directional fractional anisotropy (FA) and apparent diffusion coefficient (ADC) values from the brain. (
  • The purpose of this study was to evaluate correlations of visual-evoked potentials with microstructural brain changes as determined by DTI in patients with demyelinating central nervous disease. (
  • Microstructural changes of the whole brain correlated significantly with mean P100 visual-evoked potentials. (
  • 3 By measuring the diffusion directions of water molecules, DTI is capable of detecting microstructural changes not visible on standard MR imaging. (
  • Diffusion tensor imaging (DTI) is a promising method for characterizing microstructural changes or differences with neuropathology and treatment. (
  • To compare microstructural changes along the optical radiations and brain structure volumes between glaucoma and control subjects using in vivo magnetic resonance imaging and to analyze their association with severity of the disease. (
  • Basser PJ and Pierpaoli C (1996) Microstructural and physiological features of tissues elucidated by quantitative‐diffusion‐tensor MRI. (
  • This study investigated whether diffusion tensor imaging (DTI), a type of magnetic resonance imaging that measures white matter integrity quantitatively, could identify white matter microstructural deficits in patients with long-standing type 1 diabetes and whether these differences would be associated with deficits found by neurocognitive tests. (
  • Diffusion tensor imaging (DTI), by permitting microstructural characterization of white matter, has extended MRI findings in alcoholics. (
  • Here, we used diffusion tensor imaging (DTI) and tract based spatial statistics (TBSS) to evaluate white matter microstructure in ASD. (
  • Similar white matter aberrations in children with autism and their unaffected siblings: A diffusion tensor imaging study using tract-based spatial statistics. (
  • The present study aimed to (i) compare BPSD between patients with subcortical ischemic vascular disease (SIVD) and Alzheimer's disease (AD) across stages, and (ii) explore the associations with diffusion tensor imaging (DTI) in the corpus callosum (CC) and other major fibers. (
  • Magnetic resonance imaging (MRI) shows the absence of the corpus callosum along with other substantial central nervous system (CNS) damage. (
  • Diffusion tensor imaging (DTI) is a magnetic resonance (MR) imaging technique that enables the quantitative measurement of molecular diffusion in biologic tissues in vivo [ 1 - 7 ]. (
  • Diffusion kurtosis imaging provides several novel quantitative white mater metrics, among them the axonal water fraction ( f axon ), an index of axonal density and caliber. (
  • Bundesen's theory of visual attention (TVA) ( Bundesen, 1990 ) offers a quantitative analysis of the different facets of attention within a unitary model and provides a powerful analytic framework for understanding individual differences in attentional functions. (
  • Using dedicated DTI software, quantitative image analysis yielded parametric DTI maps of each directional diffusion coefficient (DDC), mean diffusivity, and maximal anisotropy of the lesions and normal tissue. (
  • Diffusion tensor imaging (DTI) is an imaging technology based on magnetic resonance diffusion weighted imaging, which can make quantitative analysis of anisotropy of water molecules in different directions, so as to observe the microstructure of tissues non-invasively. (
  • Pseudo-continuous arterial spin labeling MR images in Warthin tumors and pleomorphic adenomas of the parotid gland: qualitative and quantitative analyses and their correlation with histopathologic and DWI and dynamic contrast enhanced MRI findings. (
  • Quantitative sodium imaging and gliomas: a feasibility study. (
  • ALS symptom severity was assessed by a neurologist, the conventional MR images were reviewed by neuroradiologists, and the DTI maps were subject to quantitative region of interest analysis. (
  • This is because the contrast in conventional MR images varies depending upon the specific sequence parameters used and, in the absence of quantitative relaxation rate determination, the identification of abnormalities is dependent upon the subjective observations of the rater. (
  • The presented analysis showed that the DTI-derived indices (characterizing different aspects of the fiber structure) provide competitive glaucoma classification rates compared to the rates based on eye imaging modalities. (
  • This idea is supported by recent non-invasive imaging studies in humans that demonstrate the neocortex associated with the lost sensory system becomes activated by the spared modalities. (
  • This study introduces a technique of 3-D image registration of MRI and DTI modalities, towards the development of a 3-D visual interface integrating Magnetic Resonance Imaging (MRI) to Diffusion Tensor Imaging (DTI). (
  • We developed a novel technique for chronic stroke lesion segmentation based on multiple modalities including T1-weighted and T2-weighted images as well as diffusion tensor-based modalities. (
  • Among various imaging modalities, magnetic resonance imaging (MRI) is advantageous in examining the brain anatomy compared to computerized tomography (CT) which provides limited signal contrasts for soft tissue. (
  • In addition, the spatial distribution of complex brain network can also be investigated by measuring the microscopic length scale of water diffusion. (
  • The visual word form area: spatial and temporal characterization of an initial stage of reading in normal subjects and posterior split-brain patients. (
  • However, with the disease development, cognitive function gradually declines, starting as impairment of memory, language, and visual-spatial ability at early stage that slowly develops into serious dysgnosia, catalogia and/or imitation speaking, etc. (
  • The term 'diffusion' denotes random thermal motion of water molecules. (
  • The diffusion of water molecules in a tissue is not the same in all direction (anisotropic diffusion) due to tissue heterogeneity. (
  • Another limitation is that, since DTI is based on the diffusion of water molecules, it is not possible to differentiate axon directionalities through this technique. (
  • Water molecules undergo random diffusion over time because of differences in concentration according to Fick's law. (
  • 1 Diffusion tensor imaging (DTI) evaluates the passive diffusion of water molecules in tissue, from which connectivity between voxels can be inferred. (
  • Diffusion tensor imaging utilises diffusion of water molecules across white matter to map structural connectivity of neurological regions. (
  • Without barriers, water molecules move uniformly in all directions, a phenomenon referred to as isotropic diffusion. (
  • Diffusion tensor imaging (DTI) provides a rendering of axon pathways, by tracking water molecules in the brain as they travel in a direction parallel to axonal fibers, in a 3D model known as "the diffusion tensor. (
  • High angular resolution diffusion tensor imaging (HARD) is an MRI technique that exploits the mobility of water molecules to yield maps of structural order and directionality of white matter tracts with greater precision than six-direction diffusion tensor imaging (DTI) schemes. (
  • Diffusion tensor MRI (DTI), introduced in the mid 90s [ 8 , 9 ], uses multiple diffusion-sensitive pulsed-gradient pairs with differing directions that provide characterization of the diffusion of proton-bearing molecules along three orthogonal directions in each voxel. (
  • Our ongoing experience with medicolegal applications of cerebral SPECT imaging as evidence of mTBI reveals that such practices frequently fail to comport with the Daubert analysis and recommendations offered. (
  • Equally concerning is the continued application and commercialization of cerebral SPECT imaging for clinical purposes for which it lacks a sufficient evidence basis. (
  • Reduced visualization of cerebral infarction on diffusion-weighted images with short diffusion times. (
  • therefore, the objective of this study was to use diffusion tensor imaging to measure ADC and FA in infants with moderate and severe hypoxic-ischemic brain injury. (
  • Diffusion tensor Imaging (DTI) brain scans of 59 subjects were acquired. (
  • Diffusion-weighted imaging (DWI) allows for the assessment of white-matter properties in the brain and shows promise as a suitable biomarker of mTBI pathophysiology. (
  • Three-dimensional tracking of axonal projections in the brain by magnetic resonance imaging. (
  • Jones DK, Williams SC, Gasston D, Horsfield MA, Simmons A, Howard R. Isotropic resolution diffusion tensor imaging with whole brain acquisition in a clinically acceptable time. (
  • 1 - 23 It has become clear that MR techniques are the most sensitive imaging techniques for detecting brain injury and that there is good association between MR findings and neurodevelopmental outcome. (
  • Currently, 6151 consecutive term and near-term babies admitted to our neonatal intensive care unit have been prospectively screened as part of an ongoing study investigating the utility of neonatal brain MR imaging in assessing brain injury of neonates with neonatal encephalopathy. (
  • Diffusion tensor imaging (DTI) is a newly developed magnetic resonance imaging (MRI) technique that analyzes the anatomy of nerve cells and a complex neuronal network of the brain. (
  • In other words, DTI uses the diffusion of water as a probe to determine the anatomy of a brain network, which basically provides information on static anatomy that is not influenced by brain functions. (
  • This anisotropy (directional dominance of water diffusion within a region) is used in DTI to determine the nerve cell organization in the brain. (
  • Based on the axonal orientation, anisotropic diffusion can produce completely new image contrast, which is very useful in visualizing important brain structures. (
  • Diffuse vascular injury: convergent-type hemorrhage in the supratentorial white matter on susceptibility-weighted image in cases of severe traumatic brain damage. (
  • Non-invasive magnetic resonance imaging (MRI) can provide three-dimensional images of the infant brain in less than 20 minutes, with unprecedented anatomical details and contrast of brain anatomy, cortical and subcortical structures and brain connectivity. (
  • Able to name, unable to compare: the visual abilities of a posterior split-brain patient. (
  • Regularization of diffusion-based direction maps for the tracking of brain white matter fascicles. (
  • The following images show the complex networking of neurological activity involved in brain functioning. (
  • They depict the remarkable advances in imaging technology called Diffusion Tensor Imaging and can show damage areas of the brain, as well as the disruption in transmission of cellular activity. (
  • This movie depicts fibers of "connectivity" in the brain, as seen through diffusion tensor imaging (DTI), an MRI technique. (
  • The goal of this project is to use state-of-the-art brain imaging from the Human Connectome Project (HCP) in concert with sophisticated visual tasks to develop and test neurophysiological models of basic and complex visual functions of the brain in order to understand the origins of distorted perception in psychosis. (
  • Isotropic resolution diffusion tensor imaging with whole brain acquisition in a clinically acceptable time D.K. Jones, S.C.R. Williams, D. (
  • In addition, brain structures and their connectivity can be seen via magnetic resonance imaging and diffusion tensor imaging. (
  • Structural image of the human brain showing the anatomical detail possible with magnetic resonance imaging. (
  • The resulting images from positron emission tomography in which the shading represents activation of brain regions superimposed on anatomical images. (
  • Twenty three were excluded because of incomplete or poor quality imaging data or gross structural abnormality (such as a brain cyst) or incomplete alcohol use, sociodemographic, health, or cognitive data. (
  • Correlation analysis was used to explore the relationship between the observed mean ReHo values of the different brain areas and the visual evoked potential (VEP) in patients with ON. (
  • A growing body of literature addresses the application of diffusion tensor imaging (DTI) to traumatic brain injury (TBI). (
  • Detection of cavernous malformations after whole-brain radiotherapy in primitive neuroectodermal tumor patients-comparing susceptibility-weighted imaging and T2 gradient-echo sequences. (
  • Circumventricular organs of human brain visualized on post-contrast 3D fluid-attenuated inversion recovery imaging. (
  • Two research fronts were explored: (1) the development of new image processing techniques in order to accurately establish relational positioning of fiber tracts within an anatomical semi-transparent 3-D brain image, and (2) the obligation to address the computational requirements such that the processing time is within practical bounds of clinical settings. (
  • After registration, the MR images were 27% more correlated to the DT images than originally, which is considered significant given the practical consequence of brain research using multimodal platforms. (
  • In brain mapping, neural fiber trajectories can be identified by exploiting the anisotropy of diffusion processes. (
  • The imaging technique of diffusion tensor imaging (DTI) allows neurosurgeons to visualize important pathways in the brain. (
  • This allows them to better adapt brain tumor surgeries and preserve language, visual function, and motor function while removing cancerous tissue. (
  • We can view the brain from the inside out now, with 3D images detailing connectivity within the brain, making a virtual intraoperative map," said senior author Steven Brem, MD, professor of Neurosurgery, chief of the Division of Neurosurgical Oncology and co-director of the Penn Brain Tumor Center in Philadelphia, Pennsylvania. (
  • Brem said, "Penn is at the forefront of a major shift in the field- we now have such detail about each individual's brain tumor-combining diffusion tensor imaging and advanced imaging with the entire personalized diagnostics analysis available for all brain tumor patients at Penn Medicine. (
  • The colorful images, captured as part of an 8-minute sequence during an MRI, show representations of clusters of axon fibers, where each color indicates a direction of travel, and offer a glimpse of the interwoven communication superhighways of the brain. (
  • Brain Imaging Behav , , Epub ahead of print. (
  • Sixteen patients with brain tumors underwent diffusion tensor imaging (DTI). (
  • Brain imaging technology has allowed researchers to conduct rigorous studies of the dynamic course of alcoholism through periods of drinking, sobriety, and relapse and to gain insights into the effects of chronic alcoholism on the human brain. (
  • Magnetic resonance imaging (MRI) studies have distinguished alcohol-related brain effects that are permanent from those that are reversible with abstinence. (
  • 1) The use of brain-imaging technology to evaluate clinically defined syndromes associated with chronic alcoholism, each with relatively unique radiological signatures (see table 1 and figure 1), provides guideposts for studying brain alterations associated with uncomplicated alcoholism. (
  • T1-weighted and diffusion-weighted pulse sequences combined with computational neuromorphometric procedures have shown to be a valuable methodology for the investigation of structural brain differences between groups or alterations over time in the diseased as well as in the healthy brain [ 4 - 8 ]. (
  • Using imaging techniques it is possible to assess brain activity in humans and study the reorganization of brain activity after disabling conditions. (
  • Studying a well-characterized axon route - between the eye's retina and the visual area of the brain - Sahin and colleagues showed that when mouse neurons were deficient in TSC2, their axons failed to land in the right places. (
  • Using an advanced kind of MRI imaging called diffusion tensor imaging, they documented disorganized and structurally abnormal tracts of axons in the TSC group, particularly in the visual and social cognition areas of the brain (see image). (
  • Although sound symbolism is more implicit and less involuntary than synesthesia (we need clues to be able to make the right guesses), it can still be thought of as a process that cross-activates multiple - auditory and visual - areas of the brain. (
  • The study, published in the Journal of Neuroscience , used various brain imaging techniques to show exactly how the visual cortex and parietal cortex send direct information to each other through white matter connections in order to specifically pick out the information that you want to see. (
  • We have demonstrated that attention is a process in which there is one-to-one mapping between the first place visual information comes from the eyes into the brain and beyond to other parts of the brain," said Adam S. Greenberg , postdoctoral fellow in the Dietrich College of Humanities and Social Sciences ' Department of Psychology and lead author of the study. (
  • With so much information in the visual world, it's dramatic to think that you have an entire system behind knowing what to pay attention to," said Marlene Behrmann , professor of psychology at CMU and a renowned expert in using brain imaging to study the visual perception system. (
  • These diffusion tensor images of the brain illustrate the disorganization of nerve fibers in a 17-year-old girl with tuberous sclerosis complex (TSC) and autism as compared with a healthy girl of the same age. (
  • Apparent diffusion can then be quantitatively analyzed, conveying intra-voxel information about the averaged local (intracellular and extracellular) water diffusion in the brain tissue. (
  • While these previous studies showed the potential utilization of neuroradiological imaging in ovine, only a limited amount of information on the healthy brain was available. (
  • This finding is a major discovery for visual cognition and will guide future research into visual and attention deficit disorders. (
  • This is a challenging proposition, because unlike other volumetric grayscale images, in which the value at each voxel can be represented by a single number (scalar), DTI image display needs to communicate multiple values reflecting directional and magnitude information at every voxel. (
  • The diffusion tensor may be used to characterize the magnitude, the degree of anisotropy, and the orientation of directional diffusion. (
  • Diffusion is considered isotropic if it shows no directional dependence (eg, in gray matter) or anisotropic if directional dependence is present (eg, in white matter). (
  • Axial dynamic contrast-enhanced subtracted image (A) and directional diffusion coefficient λ1 parametric maps (B and C) overlaid on T1-weighted image of central slice with unenhanced (B) and contrast-enhanced (C) administration. (
  • for example, barriers to diffusion in white matter tracts include axonal proteins and myelin. (
  • Diffusion tensor imaging (DTI) is a noninvasive MRI modality that depicts the subcortical white matter tracts in vivo. (
  • Our data confirmed that DTI was a valuable in ex vivo imaging tool to identify damaged white matter tracts after graded SCI in rat, which may provide useful information for the early identification of the severity of SCI. (
  • However, since the integrity of white matter tract is the main factor affecting the function outcome of SCI patients, and conventional T2 weighted images is not suitable for the evaluation of white matter tracts, the utility of anatomic MRI as a prognostic tool is limited during the acute phase of SCI [ 8 ]. (
  • The researchers used a technique called "diffusion spectrum imaging," a new procedure pioneered at Carnegie Mellon and the University of Pittsburgh to generate the fiber tracts of the white matter connectivity. (
  • In the affected girl, the tracts of nerves that carry information from the brain's thalamus to the visual cortex are less organized, with far fewer axons connecting to the cortex. (
  • Melanin i retinale pigment epitel (RPE) er afgørende for en ordentlig udvikling af den centrale visuelle pathway. (
  • In this work, the ability of a visual pathway analysis to differentiate between glaucoma and healthy subjects is examined. (
  • This work presents a new perspective in identifying glaucoma using visual pathway analysis. (
  • The authors hypothesize that the association between DTI abnormalities in the optic radiations of patients and loss of afferent electrical activity in the optic nerves from optic neuritis could be evidence for the anterograde transsynaptic degeneration in the visual pathway that occurs following optic neuritis. (
  • Fast, parallel word recognition, in expert readers, relies on sectors of the left ventral occipito-temporal pathway collectively known as the visual word form area. (
  • High angular resolution diffusion tensor imaging may be more sensitive than conventional MRI or neurologic assessment to the upper motor neuron (UMN) pathology of ALS, but it lacks the specificity required of a diagnostic marker. (
  • However, these clinical signs and symptoms are not generally associated with visible structural abnormalities when using traditional diagnostic/clinical neuroimaging techniques (e.g., structural magnetic resonance imaging (MRI) or computed tomography (CT) in the emergency department). (
  • DTI is a recently developed technique that images the structural integrity of white matter. (
  • Magnetic resonance imaging procedures a high‐resolution structural image in a noninvasive manner that is now the standard for structural imaging. (
  • Haselgrove JC, Moore JR. Collection for distortion of echo-planar images used to calculate the apparent diffusion coefficient. (
  • Diffusion in a given volume of tissue may be quantified as the diffusion coefficient, D, which is normalized for observation time according to the Einstein equation, and expressed in mm 2 /sec. (
  • in DWI, the apparent diffusion of water molecule protons is detected as a combination of true diffusion and these other mechanisms, and is quantified as the apparent diffusion coefficient (ADC). (
  • Da en sammenhæng mellem antallet af laterale geniculate nucleus (LGN) relæ neuroner og LGN størrelse er blevet vist, og er baseret på tidligere rapporterede reduktioner i LGN mængder i human albinisme, foreslår vi, at fiber fremskrivninger fra LGN til den primære visuelle cortex (V1) reduceres også. (
  • Dette håndskrift beskriver to algoritmer til OR genopbygning for at sammenligne hjernen konnektivitet i albinisme og controls.An MRI-scanner med en 32-kanals hoved spole blev anvendt til at erhverve strukturelle scanninger. (
  • Parvise sammenligninger afslørede en signifikant reduktion i LGN til V1-forbindelse i albinisme sammenlignet med kontroller. (
  • Albinisme er en genetisk sygdom primært karakteriseret ved åbenlys hypopigmentering observeret i de ramte personer. (
  • Chenevert T, Brunberg J, Pipe J. Anisotropic diffusion in human white matter: demonstration with MR techniques in vivo. (
  • In the presence of barriers, such as cell membranes, fibers, and myelin, the diffusion rate is greater in one direction, which is termed anisotropic diffusion. (
  • A total of 50 open-angle glaucoma subjects and 50 healthy age- and sex-matched controls underwent detailed ophthalmologic examinations (including visual field testing [VF], funduscopy, and spectral-domain optical coherence tomography) as well as diffusion tensor imaging (DTI) using 3.0-Tesla magnetic resonance imaging. (
  • The tensor matrix can be diagonalized, yielding three eigenvalues and their corresponding eigenvectors. (
  • Diffusion tensor imaging (DTI) has more recently been introduced, allowing quantification of the magnitude and direction of diffusion along 3 principle eigenvectors. (
  • The tensor consists of 3 vectors: a major eigenvector (or principal eigenvector) and 2 minor eigenvectors, with magnitudes being the major eigenvalue and minor eigenvalues, respectively. (
  • We aimed to study optic radiation DTI changes over 12 months following acute ON and to study correlations between DTI parameters and damage to the optic nerve and primary visual cortex (V1). (
  • The authors of the other study, which was published in January in the Archives of Neurology, used DTI to evaluate optic nerves to determine whether diffusivity can be correlated with visual outcome six months after an acute episode of optic neuritis. (
  • The aim of this study was to assess acute ablation injuries seen on late gadolinium enhancement (LGE) magnetic resonance imaging (MRI) immediately post-ablation (IPA) and the association with permanent scar 3 months post-ablation (3moPA). (
  • In this pilot study, 26 women (age range 37-69 years) scheduled for a diagnostic breast MRI with BI-RADS categories 0, 4, 5, or 6 on conventional breast imaging were twice scanned using the same DTI sequence before and immediately after the breast dynamic contrast-enhanced MRI. (
  • In this study, we try to evaluate the difference of white matter between AD and health volunteers using diffusion tensor imaging (DTI) and try to provide some evidence for diagnose AD in early stage. (
  • Multimodal magnetic resonance imaging (MRI) was performed at study endpoint (2012-15). (
  • This prospective study consisted of 25 patients with progressive visual impairment due to suprasellar mass lesions and 6 control patients with normal vision without such lesions. (
  • ON is commonly considered a retinal disease, but a study demonstrated that patients with ON presented with abnormalities in the visual cortex. (
  • The goal is to study the structure of the images rather then just performing image denoising. (
  • Normal development of sacrococcygeal centrum ossification centers in the fetal spine: a postmortem magnetic resonance imaging study. (
  • Comparative study of pulsed-continuous arterial spin labeling and dynamic susceptibility contrast imaging by histogram analysis in evaluation of glial tumors. (
  • In the current study, diffusion tensor imaging (DTI) was performed on 24 PDM females and 24 healthy control subjects. (
  • One study demonstrated that increased diffusivity in the left uncinate fasciculus (UF) was related to poorer auditory memory, whereas increased diffusivity and reduced FA in the right UF were related to poorer visual memory in left TLE. (
  • Endogenously generated gamma-band oscillations in early visual cortex: A neurofeedback study. (
  • What are the effects of severe visual impairment on the cortical organization and connectivity of primary visual cortex? (
  • Our goal was to determine if visual cortex is reorganized in these mice, and to examine the neuroanatomical connections that may subserve reorganization. (
  • These studies have shown that the neocortex undergoes dramatic organizational changes in that cortex normally devoted to processing visual input is taken over by the spared sensory systems (e.g. (
  • Additionally, reduced white matter functioning became evident for fibres projecting to the extrastriate visual cortex. (
  • Pure alexia: clinical-pathologic evidence for a lateralized visual language association cortex. (
  • Reconstructing imagined letters from early visual cortex reveals tight topographic correspondence between visual mental imagery and perception. (
  • Psychophysical and neuroimaging responses to moving stimuli in a patient with the Riddoch phenomenon due to bilateral visual cortex lesions. (
  • Motor cortex hypointensity on T2-weighted images and corona radiata hyperintensity on proton density-weighted images distinguished patients with UMN involvement from volunteers with 100% specificity, but only 20% sensitivity. (
  • On T2-weighted images, a ribbon of signal loss (hypointensity) has been observed in the gray matter of the motor cortex adjacent to the central sulcus in a proportion of patients with ALS. (
  • Image of the parietal cortex: The three colors demonstrate one-to-one mapping from the first place visual information comes from the eyes and its path to the parietal cortex. (
  • The results demonstrated that the white matter connections are mapped systematically, meaning that direct connections exist between corresponding visual field locations in visual cortex and parietal cortex. (
  • thus, a visual representation of data obtained from a region of crossing fibers can be confusing. (
  • Since the introduction of its use in the clinical setting, diffusion-weighted imaging (DWI) has been proven to be a valuable tool in clinical neuroradiology. (
  • The appreciation of the clinical application of DTI requires an understanding of its basic underlying principles as well as potential imaging pitfalls. (
  • When Diffusion Tensor Imaging (DTI) is used in clinical studies, statistical hypothesis testing is the standard approach to establish significant differences between groups, such as patients and healthy controls. (
  • Visual evoked potential (VEP) is an important clinical test for diagnosis of ON. (
  • Arterial spin-labeling perfusion imaging of childhood encephalitis: correlation with seizure and clinical outcome. (
  • Relying heavily on the expertise of radiologists who process and analyze the DTI images, including Ronald L. Wolf, MD, PhD, associate professor of Radiology at Penn, the research on DTI is being translated into clinical practice to guide surgical procedures. (
  • The information obtained from the tensor is either condensed into one number (scalar) or 4 numbers. (
  • In DTI, the scalar elements of this diffusion tensor matrix may be calculated on a voxel-by-voxel basis from data obtained by performing multiple DWI sequences, applying the diffusion-weighted gradient along ≥6 noncollinear directions, with an additional, non-diffusion-weighted ( b = 0) sequence. (
  • Our long-term goal is to integrate high resolution models routinely obtained from pre-procedure imaging (here, via MRI) with the low resolution, sparse, images, along with a few scalar measurements such as ECG, which are feasible during the real-time procedure. (
  • In this work, a space varying coefficients model ( SVCM ) using penalized B-splines was developed to integrate diffusion tensor estimation, regularization and interpolation into a unified framework. (
  • Equilibrated warping: Finite element image registration with finite strain equilibrium gap regularization. (
  • To maximize the specificity and better characterize the tissue microstructure, future studies should use multiple diffusion tensor measures (e.g. (
  • They demonstrated that decreased diffusivity in acute optic neuritis was associated with worse six-month visual outcome and correlated with visual evoked potential and retinal nerve fiber layer measures of axon and myelin injury. (
  • Phase-Contrast Magnetic Resonance Imaging (PC-MRI) measures volumetric and time-varying blood flow data, unsurpassed in quality and completeness. (
  • In addition, high and low contrast visual acuity, visual fields, colour vision and electrophysiology will be assessed alongside quality of life measures. (
  • DTI measures the magnitude and directionality of water diffusion in tissues, which may permit identification of tissue injury before it has progressed to the point of detection by more conventional imaging techniques. (
  • Diffusion-weighted MR imaging of anisotropic water diffusion in cat central nervous system. (
  • The analysis of water diffusion is performed by applying magnetic field gradients to generate an image that is sensitized to diffusion in a particular direction. (
  • For DTI acquisition, a single-shot echo-planar imaging pulse sequence with 80 diffusion directions was performed at 3T. (
  • Mansfield P. Real-time echo-planar imaging by NMR. (
  • Collection for geometric distortion in echo planar images from BO field variations. (
  • Jezzard P, Barnett AS, Pierpaoli C. Characterization of and correction for eddy current artifacts in echo planar diffusion imaging. (
  • Elimination of eddy current artifacts in diffusion-weighted echo-planar images: the use of bipolar gradients. (
  • Low-Order 4D Dynamical Modeling of Heart Motion Under Respiration, In Proceeding of the IEEE International Symposium on Biomedical Imaging: from nano to macro , pp. 1326--1329. (
  • 24 - 29 Moreover, MR imaging can identify encephalopathic neonates at greatest risk for abnormal outcome. (
  • Abnormal contextual modulation of visual contour detection in patients with schizophrenia. (
  • 3 Although treatment of the inflammation results in good eyesight recovery in many patients with ON, in others, vision does not return to normal, and may be accompanied by abnormal color vision and visual field defects. (
  • Selvom DTI giver relativt ringe rumlig opløsning, og præcis afgrænsning af OR kan være en udfordring på grund af sin lave fiber tæthed, er traktografi vist sig at være en fordel både i forskning og klinisk. (
  • DTI provides a thorough anatomical overview of the white matter in terms of diffusion anisotropy and fiber orientation. (
  • White matter fiber tracking derived from Diffusion Tensor Imaging (DTI). (
  • While excellent local smoothing was indeed achieved by combining voxelwise tensor estimation with wavelet filtering, no immediate improvement was gained for fiber tracking. (
  • This finding suggests a stronger correlation of mean P100 visual-evoked potentials to demyelination than to axonal damage. (
  • An additional 12% in VWM capacity variance may be explained by diffusion properties of the extra-axonal space. (
  • This paper presents a complete method for segmenting neurons in electron microscopy images and visualizing them in three dimensions. (
  • Visualizing the neural bases of a disconnection syndrome with diffusion tensor imaging. (
  • The relationship between VWM and the white matter pathways interconnecting the VWM network nodes has also been studied primarily using diffusion tensor imaging (DTI). (
  • The data is often given as non-stationary and aperiodic sequences (time series) of images which require a spatio-temporal analysis. (
  • Visual impairments are the most common objective manifestations of suprasellar lesions. (
  • In fact, the value at each voxel is a tensor, which requires the use of multiple parameters for its representation. (
  • Imaging appearance, diffusion parameters, and metabolite ratios were then evaluated longitudinally (comparing with other studies on the same patient at different times) and cross-sectionally (comparing all studies performed on the same postnatal day). (
  • Leesburg, VA, August 6, 2020--An "Original Research" article published in ARRS' American Journal of Roentgenology (AJR) concluded that the accuracy of breast cancer diagnosis via diffusion-tensor imaging (DTI) was equivalent both before and after the administration of a gadolinium-based contrast agent (GBCA), despite a value change in DTI parameters. (
  • Magnetic resonance plaque imaging to predict the occurrence of the slow-flow phenomenon in carotid artery stenting procedures. (
  • The magnetic-resonance imaging machine will map the brain's function via radiofrequency pulses while a series of audio and visual tasks are performed. (
  • Dark Regions of No-Reflow on Late Gadolinium Enhancement Magnetic Resonance Imaging Result in Scar Formation After Atrial Fibrillation Ablation, In Journal of the American College of Cardiology , Vol. 58, No. 2, pp. 177--185. (
  • Over the last decade, a new type of magnetic resonance imaging (MRI) called diffusion tensor imaging (DTI) has been developed that is uniquely suited to assess white matter microstructure. (
  • Magnetic resonance imaging of developmental facial paresis: a spectrum of complex anomalies. (
  • Magnetic resonance imaging of tuberous sclerosis complex with or without epilepsy at 7 T. (
  • Magnetic resonance diffusion tensor imaging ( DTI ) allows to infere the ultrastructure of living tissue. (
  • The reader might find Chapters 1 and 4 particularly useful for a concise introduction to magnetic resonance imaging and to wavelet theory. (
  • Active head motion reduction in magnetic resonance imaging using tactile feedback. (
  • M Age = 26.4 years, SD Age = 4.0 years) completed the autism-spectrum quotient (AQ) questionnaire prior to a magnetic resonance imaging session. (
  • Image-guided thermal ablation procedures such as microwave ablation (MWA) or radiofrequency ablation (RFA) have become clinically accepted treatment options for liver tumors. (
  • Images arising for example in Positron Emission Tomography (PET) rely on two Poisson type models. (
  • En T1-vægtet 3D-MPRAGE sekvens med 1 mm 3 isotropisk voxel størrelse blev anvendt til at generere billeder i høj opløsning til V1 segmentering. (
  • Voxel-wise analyses revealed prominent diffusion measure differences in ASD children but not adolescents, when compared to healthy controls. (
  • MR imaging plays a pivotal role in establishing the diagnosis and follow-up of MS. 1 , 2 Besides conventional MR imaging, an advanced technique frequently used in MS studies is DTI. (
  • During the first week, FA values were decreased with both severe and moderate WM and BGT injury as assessed by conventional imaging, whereas ADC values were reduced only in severe WM injury and some severe BGT injury. (
  • Comparison of field-of-view optimized and constrained undistorted single-shot diffusion-weighted imaging and conventional diffusion-weighted imaging of optic nerve and chiasma at 3T. (
  • However, both conventional MRI and diffusion tensor imaging (DTI) reveal abnormalities in patients with ALS that may reflect pathologic alteration of the UMN. (
  • Previous studies have reported diffusion tensor imaging (DTI) changes within the optic radiations of patients after optic neuritis (ON). (
  • Two recently published studies examine the role that diffusion tensor imaging (DTI) may play in the management of patients with optic neuritis due to multiple sclerosis. (
  • Their results demonstrate that increased deviation and reduced magnitude of the principal directions of diffusion measured by DTI of the optic radiations of patients with prior optic neuritis episodes correlated with loss of amplitude in multifocal visual evoked potentials. (
  • They followed for at least six months 25 individuals who presented within 31 days after experiencing acute visual symptoms consistent with optic neuritis. (
  • Apparent diffusion coefficients (ADC) that are measured by diffusion-weighted imaging are reduced in severe white matter (WM) and in some severe basal ganglia and thalamic (BGT) injury in infants who present with hypoxic-ischemic encephalopathy (HIE). (
  • These methods use black and white or color with intensity values to map the complex multidimensional DTI data to a two-dimensional image. (
  • For example, white matter fibers that are running parallel to the direction of the magnetic field gradient will produce a dark diffusion-weighted image for that particular direction. (
  • Here, we investigate the relationship between white matter and VWM capacity in human subjects using an advanced diffusion imaging technique, diffusion kurtosis imaging. (
  • The diffusion tensor directly represents the direction of water and indirectly represents the orientation of white matter fibers. (
  • Diffusion tensor imaging (DTI) is an effective method to identify subtle changes to normal-appearing white matter (WM). (
  • Schizophrenia patients demonstrate perceptual deficits consistent with broad dysfunction in visual context processing. (
  • Methods and analysis 46 patients will be recruited within 28 days from onset of ON visual symptoms and randomised on a 1:1 basis to placebo or amiloride 10 mg daily. (
  • 6 Occasionally, similar MRI abnormalities in the CST are also identified on T1-weighted images in association with very pronounced UMN symptoms. (
  • Diffusion data og traktografi er nyttige til kortlægning af OR (optisk stråling). (
  • Often the 3D shading of diffusion tensor ellipsoids [ 23 ] or superquadric glyphs [ 24 ] at all voxels does not give a global view of tensor data in an imaging plane or in a volume at the zoomed-out view. (
  • To get a true 3D perspective, one must use computer animation tools to rotate the image plane or image volume thereby obtaining multiple views of the 3D tensor data [ 20 ]. (
  • However, data based primarily on diffusion tensor imaging approaches remain inconclusive. (
  • Neuroscientists are developing new imaging techniques and generating large volumes of data in an effort to understand the complex structure of the nervous system. (
  • The raw diffusion data were dealt with the toolkit of FSL image post-processing. (
  • p. 724 , published online 19 July) used teleseismic data from seismological networks in Japan and Europe to image the source of high-frequency radiation generated by the earthquake to understand the mechanics of this unique event. (
  • Improved technology offers the capacity to generate larger and more complex data sets related to imaging and simulation. (
  • In this work, we pose the question of whether, by considering qualitative information such as a sample target image as input, one can produce a rendered image of scientific data that is similar to the target. (
  • In general, we target the development and application of image analysis techniques to medical, scientific, industrial, and military problems in which automatic or semi-manual processing of images and volumetric data is required to inspect, recognize, enhance, or complement other sensory information. (
  • Vessel tree reconstruction in volumetric data is a necessary prerequisite in various medical imaging applications. (
  • Here we analyzed the DTI data with other examinations, including motor evoked potentials (MEPs), histopathological images, and behavioral results, to reflect the lesion development in different degrees of spinal cord injury (SCI) in acute and subacute stages. (
  • The individual as well as group-based data processing subsequently showed activation in the eloquent sensorimotor and visual areas. (