Veins draining the cerebrum.
Radiography of the vascular system of the brain after injection of a contrast medium.
Disorders of the centrally located thalamus, which integrates a wide range of cortical and subcortical information. Manifestations include sensory loss, MOVEMENT DISORDERS; ATAXIA, pain syndromes, visual disorders, a variety of neuropsychological conditions, and COMA. Relatively common etiologies include CEREBROVASCULAR DISORDERS; CRANIOCEREBRAL TRAUMA; BRAIN NEOPLASMS; BRAIN HYPOXIA; INTRACRANIAL HEMORRHAGES; and infectious processes.
Formation or presence of a blood clot (THROMBUS) in the CRANIAL SINUSES, large endothelium-lined venous channels situated within the SKULL. Intracranial sinuses, also called cranial venous sinuses, include the superior sagittal, cavernous, lateral, petrous sinuses, and many others. Cranial sinus thrombosis can lead to severe HEADACHE; SEIZURE; and other neurological defects.
Formation or presence of a blood clot (THROMBUS) in a blood vessel within the SKULL. Intracranial thrombosis can lead to thrombotic occlusions and BRAIN INFARCTION. The majority of the thrombotic occlusions are associated with ATHEROSCLEROSIS.
The volume of air remaining in the LUNGS at the end of a normal, quiet expiration. It is the sum of the RESIDUAL VOLUME and the EXPIRATORY RESERVE VOLUME. Common abbreviation is FRC.
Tomography using x-ray transmission and a computer algorithm to reconstruct the image.
Non-invasive method of vascular imaging and determination of internal anatomy without injection of contrast media or radiation exposure. The technique is used especially in CEREBRAL ANGIOGRAPHY as well as for studies of other vascular structures.
A method of delineating blood vessels by subtracting a tissue background image from an image of tissue plus intravascular contrast material that attenuates the X-ray photons. The background image is determined from a digitized image taken a few moments before injection of the contrast material. The resulting angiogram is a high-contrast image of the vessel. This subtraction technique allows extraction of a high-intensity signal from the superimposed background information. The image is thus the result of the differential absorption of X-rays by different tissues.
Radiography of the vascular system of the heart muscle after injection of a contrast medium.
The arterial blood vessels supplying the CEREBRUM.
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.
Abnormal outpouching in the wall of intracranial blood vessels. Most common are the saccular (berry) aneurysms located at branch points in CIRCLE OF WILLIS at the base of the brain. Vessel rupture results in SUBARACHNOID HEMORRHAGE or INTRACRANIAL HEMORRHAGES. Giant aneurysms (>2.5 cm in diameter) may compress adjacent structures, including the OCULOMOTOR NERVE. (From Adams et al., Principles of Neurology, 6th ed, p841)
The formation of an area of NECROSIS in the CEREBRUM caused by an insufficiency of arterial or venous blood flow. Infarcts of the cerebrum are generally classified by hemisphere (i.e., left vs. right), lobe (e.g., frontal lobe infarction), arterial distribution (e.g., INFARCTION, ANTERIOR CEREBRAL ARTERY), and etiology (e.g., embolic infarction).
Congenital vascular anomalies in the brain characterized by direct communication between an artery and a vein without passing through the CAPILLARIES. The locations and size of the shunts determine the symptoms including HEADACHES; SEIZURES; STROKE; INTRACRANIAL HEMORRHAGES; mass effect; and vascular steal effect.
Bleeding into the intracranial or spinal SUBARACHNOID SPACE, most resulting from INTRACRANIAL ANEURYSM rupture. It can occur after traumatic injuries (SUBARACHNOID HEMORRHAGE, TRAUMATIC). Clinical features include HEADACHE; NAUSEA; VOMITING, nuchal rigidity, variable neurological deficits and reduced mental status.
The circulation of blood through the BLOOD VESSELS of the BRAIN.
Large endothelium-lined venous channels situated between the two layers of DURA MATER, the endosteal and the meningeal layers. They are devoid of valves and are parts of the venous system of dura mater. Major cranial sinuses include a postero-superior group (such as superior sagittal, inferior sagittal, straight, transverse, and occipital) and an antero-inferior group (such as cavernous, petrosal, and basilar plexus).
The first branch of the SUBCLAVIAN ARTERY with distribution to muscles of the NECK; VERTEBRAE; SPINAL CORD; CEREBELLUM; and interior of the CEREBRUM.
Branch of the common carotid artery which supplies the anterior part of the brain, the eye and its appendages, the forehead and nose.
A noninflammatory, progressive occlusion of the intracranial CAROTID ARTERIES and the formation of netlike collateral arteries arising from the CIRCLE OF WILLIS. Cerebral angiogram shows the puff-of-smoke (moyamoya) collaterals at the base of the brain. It is characterized by endothelial HYPERPLASIA and FIBROSIS with thickening of arterial walls. This disease primarily affects children but can also occur in adults.
Bleeding into one or both CEREBRAL HEMISPHERES including the BASAL GANGLIA and the CEREBRAL CORTEX. It is often associated with HYPERTENSION and CRANIOCEREBRAL TRAUMA.
Artery formed by the bifurcation of the BASILAR ARTERY. Branches of the posterior cerebral artery supply portions of the OCCIPITAL LOBE; PARIETAL LOBE; inferior temporal gyrus, brainstem, and CHOROID PLEXUS.
Brief reversible episodes of focal, nonconvulsive ischemic dysfunction of the brain having a duration of less than 24 hours, and usually less than one hour, caused by transient thrombotic or embolic blood vessel occlusion or stenosis. Events may be classified by arterial distribution, temporal pattern, or etiology (e.g., embolic vs. thrombotic). (From Adams et al., Principles of Neurology, 6th ed, pp814-6)
A spectrum of pathological conditions of impaired blood flow in the brain. They can involve vessels (ARTERIES or VEINS) in the CEREBRUM, the CEREBELLUM, and the BRAIN STEM. Major categories include INTRACRANIAL ARTERIOVENOUS MALFORMATIONS; BRAIN ISCHEMIA; CEREBRAL HEMORRHAGE; and others.
A polygonal anastomosis at the base of the brain formed by the internal carotid (CAROTID ARTERY, INTERNAL), proximal parts of the anterior, middle, and posterior cerebral arteries (ANTERIOR CEREBRAL ARTERY; MIDDLE CEREBRAL ARTERY; POSTERIOR CEREBRAL ARTERY), the anterior communicating artery and the posterior communicating arteries.
Congenital, inherited, or acquired abnormalities involving ARTERIES; VEINS; or venous sinuses in the BRAIN; SPINAL CORD; and MENINGES.
Preparations of pathogenic organisms or their derivatives made nontoxic and intended for active immunologic prophylaxis. They include deactivated toxins. Anatoxin toxoids are distinct from anatoxins that are TROPANES found in CYANOBACTERIA.
The tearing or bursting of the weakened wall of the aneurysmal sac, usually heralded by sudden worsening pain. The great danger of a ruptured aneurysm is the large amount of blood spilling into the surrounding tissues and cavities, causing HEMORRHAGIC SHOCK.
Localized reduction of blood flow to brain tissue due to arterial obstruction or systemic hypoperfusion. This frequently occurs in conjunction with brain hypoxia (HYPOXIA, BRAIN). Prolonged ischemia is associated with BRAIN INFARCTION.
Visualization of a vascular system after intravenous injection of a fluorescein solution. The images may be photographed or televised. It is used especially in studying the retinal and uveal vasculature.
Embolism or thrombosis involving blood vessels which supply intracranial structures. Emboli may originate from extracranial or intracranial sources. Thrombosis may occur in arterial or venous structures.
Microsurgical revascularization to improve intracranial circulation. It usually involves joining the extracranial circulation to the intracranial circulation but may include extracranial revascularization (e.g., subclavian-vertebral artery bypass, subclavian-external carotid artery bypass). It is performed by joining two arteries (direct anastomosis or use of graft) or by free autologous transplantation of highly vascularized tissue to the surface of the brain.
Constriction of arteries in the SKULL due to sudden, sharp, and often persistent smooth muscle contraction in blood vessels. Intracranial vasospasm results in reduced vessel lumen caliber, restricted blood flow to the brain, and BRAIN ISCHEMIA that may lead to hypoxic-ischemic brain injury (HYPOXIA-ISCHEMIA, BRAIN).
The artery formed by the union of the right and left vertebral arteries; it runs from the lower to the upper border of the pons, where it bifurcates into the two posterior cerebral arteries.
A method of hemostasis utilizing various agents such as Gelfoam, silastic, metal, glass, or plastic pellets, autologous clot, fat, and muscle as emboli. It has been used in the treatment of spinal cord and INTRACRANIAL ARTERIOVENOUS MALFORMATIONS, renal arteriovenous fistulas, gastrointestinal bleeding, epistaxis, hypersplenism, certain highly vascular tumors, traumatic rupture of blood vessels, and control of operative hemorrhage.
Pathological processes which result in the partial or complete obstruction of ARTERIES. They are characterized by greatly reduced or absence of blood flow through these vessels. They are also known as arterial insufficiency.
Pathological conditions of intracranial ARTERIES supplying the CEREBRUM. These diseases often are due to abnormalities or pathological processes in the ANTERIOR CEREBRAL ARTERY; MIDDLE CEREBRAL ARTERY; and POSTERIOR CEREBRAL ARTERY.
A heterogeneous group of nonprogressive motor disorders caused by chronic brain injuries that originate in the prenatal period, perinatal period, or first few years of life. The four major subtypes are spastic, athetoid, ataxic, and mixed cerebral palsy, with spastic forms being the most common. The motor disorder may range from difficulties with fine motor control to severe spasticity (see MUSCLE SPASTICITY) in all limbs. Spastic diplegia (Little disease) is the most common subtype, and is characterized by spasticity that is more prominent in the legs than in the arms. Pathologically, this condition may be associated with LEUKOMALACIA, PERIVENTRICULAR. (From Dev Med Child Neurol 1998 Aug;40(8):520-7)
Artery formed by the bifurcation of the internal carotid artery (CAROTID ARTERY, INTERNAL). Branches of the anterior cerebral artery supply the CAUDATE NUCLEUS; INTERNAL CAPSULE; PUTAMEN; SEPTAL NUCLEI; GYRUS CINGULI; and surfaces of the FRONTAL LOBE and PARIETAL LOBE.
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.
Inflammation of blood vessels within the central nervous system. Primary vasculitis is usually caused by autoimmune or idiopathic factors, while secondary vasculitis is caused by existing disease process. Clinical manifestations are highly variable but include HEADACHE; SEIZURES; behavioral alterations; INTRACRANIAL HEMORRHAGES; TRANSIENT ISCHEMIC ATTACK; and BRAIN INFARCTION. (From Adams et al., Principles of Neurology, 6th ed, pp856-61)
Pathological conditions involving the CAROTID ARTERIES, including the common, internal, and external carotid arteries. ATHEROSCLEROSIS and TRAUMA are relatively frequent causes of carotid artery pathology.
Enzymes that catalyze the transfer of an aminoacyl group from donor to acceptor resulting in the formation of an ester or amide linkage. EC 2.3.2.
Narrowing or stricture of any part of the CAROTID ARTERIES, most often due to atherosclerotic plaque formation. Ulcerations may form in atherosclerotic plaques and induce THROMBUS formation. Platelet or cholesterol emboli may arise from stenotic carotid lesions and induce a TRANSIENT ISCHEMIC ATTACK; CEREBROVASCULAR ACCIDENT; or temporary blindness (AMAUROSIS FUGAX). (From Adams et al., Principles of Neurology, 6th ed, pp 822-3)
Localized or diffuse reduction in blood flow through the vertebrobasilar arterial system, which supplies the BRAIN STEM; CEREBELLUM; OCCIPITAL LOBE; medial TEMPORAL LOBE; and THALAMUS. Characteristic clinical features include SYNCOPE; lightheadedness; visual disturbances; and VERTIGO. BRAIN STEM INFARCTIONS or other BRAIN INFARCTION may be associated.
Vascular diseases characterized by thickening and hardening of the walls of ARTERIES inside the SKULL. There are three subtypes: (1) atherosclerosis with fatty deposits in the ARTERIAL INTIMA; (2) Monckeberg's sclerosis with calcium deposits in the media and (3) arteriolosclerosis involving the small caliber arteries. Clinical signs include HEADACHE; CONFUSION; transient blindness (AMAUROSIS FUGAX); speech impairment; and HEMIPARESIS.
Total loss of vision in all or part of the visual field due to bilateral OCCIPITAL LOBE (i.e., VISUAL CORTEX) damage or dysfunction. Anton syndrome is characterized by the psychic denial of true, organic cortical blindness. (Adams et al., Principles of Neurology, 6th ed, p460)
Any operation on the cranium or incision into the cranium. (Dorland, 28th ed)
An abnormal direct communication between an artery and a vein without passing through the CAPILLARIES. An A-V fistula usually leads to the formation of a dilated sac-like connection, arteriovenous aneurysm. The locations and size of the shunts determine the degree of effects on the cardiovascular functions such as BLOOD PRESSURE and HEART RATE.
A generalized seizure disorder characterized by recurrent major motor seizures. The initial brief tonic phase is marked by trunk flexion followed by diffuse extension of the trunk and extremities. The clonic phase features rhythmic flexor contractions of the trunk and limbs, pupillary dilation, elevations of blood pressure and pulse, urinary incontinence, and tongue biting. This is followed by a profound state of depressed consciousness (post-ictal state) which gradually improves over minutes to hours. The disorder may be cryptogenic, familial, or symptomatic (caused by an identified disease process). (From Adams et al., Principles of Neurology, 6th ed, p329)
Genes whose gain-of-function alterations lead to NEOPLASTIC CELL TRANSFORMATION. They include, for example, genes for activators or stimulators of CELL PROLIFERATION such as growth factors, growth factor receptors, protein kinases, signal transducers, nuclear phosphoproteins, and transcription factors. A prefix of "v-" before oncogene symbols indicates oncogenes captured and transmitted by RETROVIRUSES; the prefix "c-" before the gene symbol of an oncogene indicates it is the cellular homolog (PROTO-ONCOGENES) of a v-oncogene.
Maintenance of blood flow to an organ despite obstruction of a principal vessel. Blood flow is maintained through small vessels.
Abnormal formation of blood vessels that shunt arterial blood directly into veins without passing through the CAPILLARIES. They usually are crooked, dilated, and with thick vessel walls. A common type is the congenital arteriovenous fistula. The lack of blood flow and oxygen in the capillaries can lead to tissue damage in the affected areas.
A value equal to the total volume flow divided by the cross-sectional area of the vascular bed.
Either of the two principal arteries on both sides of the neck that supply blood to the head and neck; each divides into two branches, the internal carotid artery and the external carotid artery.
Surgery performed on the nervous system or its parts.
Assessment of sensory and motor responses and reflexes that is used to determine impairment of the nervous system.
Blocking of a blood vessel in the SKULL by an EMBOLUS which can be a blood clot (THROMBUS) or other undissolved material in the blood stream. Most emboli are of cardiac origin and are associated with HEART DISEASES. Other non-cardiac sources of emboli are usually associated with VASCULAR DISEASES.
Accumulation of blood in the SUBDURAL SPACE between the DURA MATER and the arachnoidal layer of the MENINGES. This condition primarily occurs over the surface of a CEREBRAL HEMISPHERE, but may develop in the spinal canal (HEMATOMA, SUBDURAL, SPINAL). Subdural hematoma can be classified as the acute or the chronic form, with immediate or delayed symptom onset, respectively. Symptoms may include loss of consciousness, severe HEADACHE, and deteriorating mental status.
NECROSIS occurring in the MIDDLE CEREBRAL ARTERY distribution system which brings blood to the entire lateral aspects of each CEREBRAL HEMISPHERE. Clinical signs include impaired cognition; APHASIA; AGRAPHIA; weak and numbness in the face and arms, contralaterally or bilaterally depending on the infarction.
A folic acid derivative used as a rodenticide that has been shown to be teratogenic.
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)
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 condition of an anatomical structure's being constricted beyond normal dimensions.
Evaluation undertaken to assess the results or consequences of management and procedures used in combating disease in order to determine the efficacy, effectiveness, safety, and practicability of these interventions in individual cases or series.
An acquired or spontaneous abnormality in which there is communication between CAVERNOUS SINUS, a venous structure, and the CAROTID ARTERIES. It is often associated with HEAD TRAUMA, specifically basilar skull fractures (SKULL FRACTURE, BASILAR). Clinical signs often include VISION DISORDERS and INTRACRANIAL HYPERTENSION.
An irregularly shaped venous space in the dura mater at either side of the sphenoid bone.
Splitting of the vessel wall in the VERTEBRAL ARTERY. Interstitial hemorrhage into the media of the vessel wall can lead to occlusion of the vertebral artery, aneurysm formation, or THROMBOEMBOLISM. Vertebral artery dissection is often associated with TRAUMA and injuries to the head-neck region but can occur spontaneously.
Hand-held tools or implements used by health professionals for the performance of surgical tasks.
A condition characterized by somnolence or coma in the presence of an acute infection with PLASMODIUM FALCIPARUM (and rarely other Plasmodium species). Initial clinical manifestations include HEADACHES; SEIZURES; and alterations of mentation followed by a rapid progression to COMA. Pathologic features include cerebral capillaries filled with parasitized erythrocytes and multiple small foci of cortical and subcortical necrosis. (From Adams et al., Principles of Neurology, 6th ed, p136)
Arteries arising from the external carotid or the maxillary artery and distributing to the temporal region.
Accumulation of blood in the SUBDURAL SPACE over the CEREBRAL HEMISPHERE.
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.
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.
INFARCTION of the dorsolateral aspect of MEDULLA OBLONGATA in the BRAIN STEM. It is caused by occlusion of the VERTEBRAL ARTERY and/or the posterior inferior cerebellar artery. Clinical manifestations vary with the size of infarction, but may include loss of pain and temperature sensation in the ipsilateral face and contralateral body below the chin; ipsilateral HORNER SYNDROME; ipsilateral ATAXIA; DYSARTHRIA; VERTIGO; nausea, hiccup; dysphagia; and VOCAL CORD PARALYSIS. (From Adams et al., Principles of Neurology, 6th ed, p801)
The symptom of PAIN in the cranial region. It may be an isolated benign occurrence or manifestation of a wide variety of HEADACHE DISORDERS.
Elements of limited time intervals, contributing to particular results or situations.
Bleeding within the SKULL, including hemorrhages in the brain and the three membranes of MENINGES. The escape of blood often leads to the formation of HEMATOMA in the cranial epidural, subdural, and subarachnoid spaces.
A collection of blood outside the BLOOD VESSELS. Hematoma can be localized in an organ, space, or tissue.
Aneurysm due to growth of microorganisms in the arterial wall, or infection arising within preexisting arteriosclerotic aneurysms.
The measurement of visualization by radiation of any organ after a radionuclide has been injected into its blood supply. It is used to diagnose heart, liver, lung, and other diseases and to measure the function of those organs, except renography, for which RADIOISOTOPE RENOGRAPHY is available.
A spontaneous diminution or abatement of a disease over time, without formal treatment.
Use or insertion of a tubular device into a duct, blood vessel, hollow organ, or body cavity for injecting or withdrawing fluids for diagnostic or therapeutic purposes. It differs from INTUBATION in that the tube here is used to restore or maintain patency in obstructions.
Tear or break of an organ, vessel or other soft part of the body, occurring in the absence of external force.
A non-invasive technique using ultrasound for the measurement of cerebrovascular hemodynamics, particularly cerebral blood flow velocity and cerebral collateral flow. With a high-intensity, low-frequency pulse probe, the intracranial arteries may be studied transtemporally, transorbitally, or from below the foramen magnum.
Blood clot formation in any part of the CAROTID ARTERIES. This may produce CAROTID STENOSIS or occlusion of the vessel, leading to TRANSIENT ISCHEMIC ATTACK; CEREBRAL INFARCTION; or AMAUROSIS FUGAX.
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.
The outermost of the three MENINGES, a fibrous membrane of connective tissue that covers the brain and the spinal cord.
The visualization of deep structures of the body by recording the reflections or echoes of ultrasonic pulses directed into the tissues. Use of ultrasound for imaging or diagnostic purposes employs frequencies ranging from 1.6 to 10 megahertz.
The direct continuation of the brachial trunk, originating at the bifurcation of the brachial artery opposite the neck of the radius. Its branches may be divided into three groups corresponding to the three regions in which the vessel is situated, the forearm, wrist, and hand.
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)
Pathological processes of CORONARY ARTERIES that may derive from a congenital abnormality, atherosclerotic, or non-atherosclerotic cause.
A type of lung inflammation resulting from the aspiration of food, liquid, or gastric contents into the upper RESPIRATORY TRACT.
Aneurysm caused by a tear in the TUNICA INTIMA of a blood vessel leading to interstitial HEMORRHAGE, and splitting (dissecting) of the vessel wall, often involving the AORTA. Dissection between the intima and media causes luminal occlusion. Dissection at the media, or between the media and the outer adventitia causes aneurismal dilation.
An aspect of personal behavior or lifestyle, environmental exposure, or inborn or inherited characteristic, which, on the basis of epidemiologic evidence, is known to be associated with a health-related condition considered important to prevent.
The excision of the thickened, atheromatous tunica intima of a carotid artery.
Computed tomography where there is continuous X-ray exposure to the patient while being transported in a spiral or helical pattern through the beam of irradiation. This provides improved three-dimensional contrast and spatial resolution compared to conventional computed tomography, where data is obtained and computed from individual sequential exposures.
The return of a sign, symptom, or disease after a remission.
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.
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.
A non-ionic, water-soluble contrast agent which is used in myelography, arthrography, nephroangiography, arteriography, and other radiological procedures.
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.
Pathologic processes that affect patients after a surgical procedure. They may or may not be related to the disease for which the surgery was done, and they may or may not be direct results of the surgery.
Devices that provide support for tubular structures that are being anastomosed or for body cavities during skin grafting.
Types of spiral computed tomography technology in which multiple slices of data are acquired simultaneously improving the resolution over single slice acquisition technology.
Therapy for MOVEMENT DISORDERS, especially PARKINSON DISEASE, that applies electricity via stereotactic implantation of ELECTRODES in specific areas of the BRAIN such as the THALAMUS. The electrodes are attached to a neurostimulator placed subcutaneously.
The veins and arteries of the HEART.
An effective non-ionic, water-soluble contrast agent which is used in myelography, arthrography, nephroangiography, arteriography, and other radiographic procedures. Its low systemic toxicity is the combined result of low chemotoxicity and low osmolality.
An imbalance between myocardial functional requirements and the capacity of the CORONARY VESSELS to supply sufficient blood flow. It is a form of MYOCARDIAL ISCHEMIA (insufficient blood supply to the heart muscle) caused by a decreased capacity of the coronary vessels.
Computer systems or networks designed to provide radiographic interpretive information.
A method of computed tomography that uses radionuclides which emit a single photon of a given energy. The camera is rotated 180 or 360 degrees around the patient to capture images at multiple positions along the arc. The computer is then used to reconstruct the transaxial, sagittal, and coronal images from the 3-dimensional distribution of radionuclides in the organ. The advantages of SPECT are that it can be used to observe biochemical and physiological processes as well as size and volume of the organ. The disadvantage is that, unlike positron-emission tomography where the positron-electron annihilation results in the emission of 2 photons at 180 degrees from each other, SPECT requires physical collimation to line up the photons, which results in the loss of many available photons and hence degrades the image.
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.
A tricarbocyanine dye that is used diagnostically in liver function tests and to determine blood volume and cardiac output.
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).
Levels within a diagnostic group which are established by various measurement criteria applied to the seriousness of a patient's disorder.
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)
Four CSF-filled (see CEREBROSPINAL FLUID) cavities within the cerebral hemispheres (LATERAL VENTRICLES), in the midline (THIRD VENTRICLE) and within the PONS and MEDULLA OBLONGATA (FOURTH VENTRICLE).
A heterogeneous group of sporadic or familial disorders characterized by AMYLOID deposits in the walls of small and medium sized blood vessels of CEREBRAL CORTEX and MENINGES. Clinical features include multiple, small lobar CEREBRAL HEMORRHAGE; cerebral ischemia (BRAIN ISCHEMIA); and CEREBRAL INFARCTION. Cerebral amyloid angiopathy is unrelated to generalized AMYLOIDOSIS. Amyloidogenic peptides in this condition are nearly always the same ones found in ALZHEIMER DISEASE. (from Kumar: Robbins and Cotran: Pathologic Basis of Disease, 7th ed., 2005)
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.
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.
The flow of BLOOD through or around an organ or region of the body.
Studies to determine the advantages or disadvantages, practicability, or capability of accomplishing a projected plan, study, or project.
Ultrasonography applying the Doppler effect combined with real-time imaging. The real-time image is created by rapid movement of the ultrasound beam. A powerful advantage of this technique is the ability to estimate the velocity of flow from the Doppler shift frequency.
The use of ultrasound to guide minimally invasive surgical procedures such as needle ASPIRATION BIOPSY; DRAINAGE; etc. Its widest application is intravascular ultrasound imaging but it is useful also in urology and intra-abdominal conditions.
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.
Dominance of one cerebral hemisphere over the other in cerebral functions.
Blocking of the PULMONARY ARTERY or one of its branches by an EMBOLUS.
NECROSIS of the MYOCARDIUM caused by an obstruction of the blood supply to the heart (CORONARY CIRCULATION).
Dilation of an occluded coronary artery (or arteries) by means of a balloon catheter to restore myocardial blood supply.
Pressure within the cranial cavity. It is influenced by brain mass, the circulatory system, CSF dynamics, and skull rigidity.
The number of new cases of a given disease during a given period in a specified population. It also is used for the rate at which new events occur in a defined population. It is differentiated from PREVALENCE, which refers to all cases, new or old, in the population at a given time.
Naturally occurring or experimentally induced animal diseases with pathological processes sufficiently similar to those of human diseases. They are used as study models for human diseases.
Recording of the moment-to-moment electromotive forces of the HEART as projected onto various sites on the body's surface, delineated as a scalar function of time. The recording is monitored by a tracing on slow moving chart paper or by observing it on a cardioscope, which is a CATHODE RAY TUBE DISPLAY.
A complex of gadolinium with a chelating agent, diethylenetriamine penta-acetic acid (DTPA see PENTETIC ACID), that is given to enhance the image in cranial and spinal MRIs. (From Martindale, The Extra Pharmacopoeia, 30th ed, p706)
The concave interior of the eye, consisting of the retina, the choroid, the sclera, the optic disk, and blood vessels, seen by means of the ophthalmoscope. (Cline et al., Dictionary of Visual Science, 4th ed)
Diagnostic and therapeutic procedures that are invasive or surgical in nature, and require the expertise of a specially trained radiologist. In general, they are more invasive than diagnostic imaging but less invasive than major surgery. They often involve catheterization, fluoroscopy, or computed tomography. Some examples include percutaneous transhepatic cholangiography, percutaneous transthoracic biopsy, balloon angioplasty, and arterial embolization.
Delivery of drugs into an artery.
Disease having a short and relatively severe course.
The degree to which BLOOD VESSELS are not blocked or obstructed.
The amount of radiation energy that is deposited in a unit mass of material, such as tissues of plants or animal. In RADIOTHERAPY, radiation dosage is expressed in gray units (Gy). In RADIOLOGIC HEALTH, the dosage is expressed by the product of absorbed dose (Gy) and quality factor (a function of linear energy transfer), and is called radiation dose equivalent in sievert units (Sv).
Radiographic visualization of the aorta and its branches by injection of contrast media, using percutaneous puncture or catheterization procedures.
Radiographic visualization or recording of a vein after the injection of contrast medium.
Procedures in which placement of CARDIAC CATHETERS is performed for therapeutic or diagnostic procedures.
Triiodo-substituted derivatives of BENZOIC ACID.
A technique to arrest the flow of blood by lowering BODY TEMPERATURE to about 20 degrees Centigrade, usually achieved by infusing chilled perfusate. The technique provides a bloodless surgical field for complex surgeries.
The symptom of paroxysmal pain consequent to MYOCARDIAL ISCHEMIA usually of distinctive character, location and radiation. It is thought to be provoked by a transient stressful situation during which the oxygen requirements of the MYOCARDIUM exceed that supplied by the CORONARY CIRCULATION.
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.
The formation or presence of a blood clot (THROMBUS) within a vein.
Unstable isotopes of xenon that decay or disintegrate emitting radiation. Xe atoms with atomic weights 121-123, 125, 127, 133, 135, 137-145 are radioactive xenon isotopes.
Tissue NECROSIS in any area of the brain, including the CEREBRAL HEMISPHERES, the CEREBELLUM, and the BRAIN STEM. Brain infarction is the result of a cascade of events initiated by inadequate blood flow through the brain that is followed by HYPOXIA and HYPOGLYCEMIA in brain tissue. Damage may be temporary, permanent, selective or pan-necrosis.
Ultrasonography applying the Doppler effect, with the superposition of flow information as colors on a gray scale in a real-time image. This type of ultrasonography is well-suited to identifying the location of high-velocity flow (such as in a stenosis) or of mapping the extent of flow in a certain region.
Ultrasonography applying the Doppler effect, with frequency-shifted ultrasound reflections produced by moving targets (usually red blood cells) in the bloodstream along the ultrasound axis in direct proportion to the velocity of movement of the targets, to determine both direction and velocity of blood flow. (Stedman, 25th ed)
Tomography using radioactive emissions from injected RADIONUCLIDES and computer ALGORITHMS to reconstruct an image.
The movement and the forces involved in the movement of the blood through the CARDIOVASCULAR SYSTEM.
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.
Damage to tissues as the result of low environmental temperatures.
Particles of any solid substance, generally under 30 microns in size, often noted as PM30. There is special concern with PM1 which can get down to PULMONARY ALVEOLI and induce MACROPHAGE ACTIVATION and PHAGOCYTOSIS leading to FOREIGN BODY REACTION and LUNG DISEASES.
Methods developed to aid in the interpretation of ultrasound, radiographic images, etc., for diagnosis of disease.
Pressure, burning, or numbness in the chest.
A colorless, odorless gas that can be formed by the body and is necessary for the respiration cycle of plants and animals.
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.
A strain of albino rat used widely for experimental purposes because of its calmness and ease of handling. It was developed by the Sprague-Dawley Animal Company.
Restoration of blood supply to tissue which is ischemic due to decrease in normal blood supply. The decrease may result from any source including atherosclerotic obstruction, narrowing of the artery, or surgical clamping. It is primarily a procedure for treating infarction or other ischemia, by enabling viable ischemic tissue to recover, thus limiting further necrosis. However, it is thought that reperfusion can itself further damage the ischemic tissue, causing REPERFUSION INJURY.
The innermost layer of the three meninges covering the brain and spinal cord. It is the fine vascular membrane that lies under the ARACHNOID and the DURA MATER.
A reduction in brain oxygen supply due to ANOXEMIA (a reduced amount of oxygen being carried in the blood by HEMOGLOBIN), or to a restriction of the blood supply to the brain, or both. Severe hypoxia is referred to as anoxia, and is a relatively common cause of injury to the central nervous system. Prolonged brain anoxia may lead to BRAIN DEATH or a PERSISTENT VEGETATIVE STATE. Histologically, this condition is characterized by neuronal loss which is most prominent in the HIPPOCAMPUS; GLOBUS PALLIDUS; CEREBELLUM; and inferior olives.
Motion pictures of the passage of contrast medium through blood vessels.
A noninvasive technique that uses the differential absorption properties of hemoglobin and myoglobin to evaluate tissue oxygenation and indirectly can measure regional hemodynamics and blood flow. Near-infrared light (NIR) can propagate through tissues and at particular wavelengths is differentially absorbed by oxygenated vs. deoxygenated forms of hemoglobin and myoglobin. Illumination of intact tissue with NIR allows qualitative assessment of changes in the tissue concentration of these molecules. The analysis is also used to determine body composition.
The vessels carrying blood away from the heart.
The circulation of blood through the CORONARY VESSELS of the HEART.
The creation and display of functional images showing where the blood is flowing into the MYOCARDIUM by following over time the distribution of tracers injected into the blood stream.
Radiography of the heart and great vessels after injection of a contrast medium.
Drugs intended to prevent damage to the brain or spinal cord from ischemia, stroke, convulsions, or trauma. Some must be administered before the event, but others may be effective for some time after. They act by a variety of mechanisms, but often directly or indirectly minimize the damage produced by endogenous excitatory amino acids.
Volume of circulating BLOOD. It is the sum of the PLASMA VOLUME and ERYTHROCYTE VOLUME.
Use of infusions of FIBRINOLYTIC AGENTS to destroy or dissolve thrombi in blood vessels or bypass grafts.
Drug-induced depression of consciousness during which patients cannot be easily aroused but respond purposely following repeated painful stimulation. The ability to independently maintain ventilatory function may be impaired. (From: American Society of Anesthesiologists Practice Guidelines)
A branch of the abdominal aorta which supplies the kidneys, adrenal glands and ureters.
The ratio of maximum blood flow to the MYOCARDIUM with CORONARY STENOSIS present, to the maximum equivalent blood flow without stenosis. The measurement is commonly used to verify borderline stenosis of CORONARY ARTERIES.
The restoration of blood supply to the myocardium. (From Dorland, 28th ed)
Branch of the common carotid artery which supplies the exterior of the head, the face, and the greater part of the neck.
The arterial trunk that arises from the abdominal aorta and after a short course divides into the left gastric, common hepatic and splenic arteries.
Surgical therapy of ischemic coronary artery disease achieved by grafting a section of saphenous vein, internal mammary artery, or other substitute between the aorta and the obstructed coronary artery distal to the obstructive lesion.
Use of a balloon catheter for dilation of an occluded artery. It is used in treatment of arterial occlusive diseases, including renal artery stenosis and arterial occlusions in the leg. For the specific technique of BALLOON DILATION in coronary arteries, ANGIOPLASTY, BALLOON, CORONARY is available.
Not an aneurysm but a well-defined collection of blood and CONNECTIVE TISSUE outside the wall of a blood vessel or the heart. It is the containment of a ruptured blood vessel or heart, such as sealing a rupture of the left ventricle. False aneurysm is formed by organized THROMBUS and HEMATOMA in surrounding tissue.
Gadolinium. An element of the rare earth family of metals. It has the atomic symbol Gd, atomic number 64, and atomic weight 157.25. Its oxide is used in the control rods of some nuclear reactors.
A prediction of the probable outcome of a disease based on a individual's condition and the usual course of the disease as seen in similar situations.
Timing the acquisition of imaging data to specific points in the cardiac cycle to minimize image blurring and other motion artifacts.
Malformations of CORONARY VESSELS, either arteries or veins. Included are anomalous origins of coronary arteries; ARTERIOVENOUS FISTULA; CORONARY ANEURYSM; MYOCARDIAL BRIDGING; and others.
The circulation of the BLOOD through the MICROVASCULAR NETWORK.
Care given during the period prior to undergoing surgery when psychological and physical preparations are made according to the special needs of the individual patient. This period spans the time between admission to the hospital to the time the surgery begins. (From Dictionary of Health Services Management, 2d ed)
The creation and display of functional images showing where the blood flow reaches by following the distribution of tracers injected into the blood stream.
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).
Specialized non-fenestrated tightly-joined ENDOTHELIAL CELLS with TIGHT JUNCTIONS that form a transport barrier for certain substances between the cerebral capillaries and the BRAIN tissue.
Pathologic deposition of calcium salts in tissues.
Fibrinolysin or agents that convert plasminogen to FIBRINOLYSIN.
The first artificially produced element and a radioactive fission product of URANIUM. Technetium has the atomic symbol Tc, atomic number 43, and atomic weight 98.91. All technetium isotopes are radioactive. Technetium 99m (m=metastable) which is the decay product of Molybdenum 99, has a half-life of about 6 hours and is used diagnostically as a radioactive imaging agent. Technetium 99 which is a decay product of technetium 99m, has a half-life of 210,000 years.
The qualitative or quantitative estimation of the likelihood of adverse effects that may result from exposure to specified health hazards or from the absence of beneficial influences. (Last, Dictionary of Epidemiology, 1988)
One of the CARBONIC ANHYDRASE INHIBITORS that is sometimes effective against absence seizures. It is sometimes useful also as an adjunct in the treatment of tonic-clonic, myoclonic, and atonic seizures, particularly in women whose seizures occur or are exacerbated at specific times in the menstrual cycle. However, its usefulness is transient often because of rapid development of tolerance. Its antiepileptic effect may be due to its inhibitory effect on brain carbonic anhydrase, which leads to an increased transneuronal chloride gradient, increased chloride current, and increased inhibition. (From Smith and Reynard, Textbook of Pharmacology, 1991, p337)
Obstruction of flow in biological or prosthetic vascular grafts.
The main artery of the thigh, a continuation of the external iliac artery.
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.
Cerebral angiography showed a right moyamoya pattern and an ipsilateral dural AVF fed by branches of the external carotid ... This extremely rare coincidental presentation may have deeper pathogenic implications. Scott, R. Michael; Smith, Edward R. ( ... These vessels are the ACA (anterior cerebral artery), MCA (middle cerebral artery), and ICA (internal carotid artery). The ... anterior cerebral artery and middle cerebral artery Stage 4 Minimization of the moyamoya and defects of the posterior cerebral ...
The best images of an AVM are obtained through cerebral angiography. This procedure involves using a catheter, threaded through ... These include the sensorimotor cortices, deep cerebellar nuclei, cerebral peduncles, thalamus, hypothalamus, internal capsule, ... A cerebral arteriovenous malformation (cerebral AVM, CAVM, cAVM) is an abnormal connection between the arteries and veins in ... and cerebral angiography. A CT scan of the head is usually performed first when the subject is symptomatic. It can suggest the ...
In many cases there is evidence of constriction of the blood vessels (if angiography is performed), suggesting a possible ... Finally, according to the "neuropeptide/cerebral vasoconstriction" theory, some specific substances (endothelin 1, thromboxane ... and a central pattern with vasogenic oedema in the deep white matter, basal ganglia, thalami, brainstem and pons. These ... postpartum cerebral angiopathy, and drugs of abuse (cocaine and amphetamine). It has been suggested that PRES is identical or ...
It is thought that this is what causes cerebral microbleeds in deep brain regions. This small vessel damage can also reduce the ... "MR angiography and imaging for the evaluation of middle cerebral artery atherosclerotic disease". American Journal of ... Cerebral amyloid angiopathy is found in 90% of the cases at autopsy, with 25% being severe CAA. Cerebral microbleeds (CMB) ... It mainly affects the ends of the arterioles which are located in the deep gray nuclei and deep white matter of the brain. ...
Angiography studies cite that the vessel can be seen 67% or 50% of the time. The anterior cerebral artery develops from a ... It also supplies the front four-fifths of the corpus callosum, and provides blood to deep structures such as the anterior limb ... paratonic rigidity Anterior cerebral artery Cerebral arteries seen from beneath. Anterior cerebral artery visible at centre. ... Uchino, A; Nomiyama, K; Takase, Y; Kudo, S (September 2006). "Anterior cerebral artery variations detected by MR angiography". ...
Cerebral angiography may demonstrate smaller clots than CT or MRI, and obstructed veins may give the "corkscrew appearance". ... thrombosis of the deep cerebral venous system, central nervous system infection and cancer. A subsequent systematic review of ... Cerebral venous sinus thrombosis (CVST), cerebral venous and sinus thrombosis or cerebral venous thrombosis (CVT), is the ... There are various neuroimaging investigations that may detect cerebral sinus thrombosis. Cerebral edema and venous infarction ...
... in Vancouver Portuguese neurosurgeon Egas Moniz first presented his discovery of cerebral angiography arterial encephelography ... Inventor Stanley S. Jenkins applied for the patent for the process that he used to create the corn dog and other deep-fried ... "an apparatus in which a new and novel edible food product may be deep fried... consisting of an article of food impaled on a ...
ISBN 0-683-06141-0. Krayenbühl, Hugo; Yaşargil, Mahmut Gazi; Huber, Peter; Bosse, George (1982), Cerebral Angiography, Thieme, ... Deep branches supply the basal ganglia as well as the internal capsule MCA occlusion site and resulting Aphasia Global - trunk ... Diagnostic Cerebral Angiography, Lippincott Williams & Wilkins, pp. 143-144, ISBN 978-0-397-58404-8 MedEd at Loyola Neuro/ ... posterior branch of MCA Occlusion of the middle cerebral artery results in Middle cerebral artery syndrome, potentially showing ...
As a result, cerebral perfusion pressure (the pressure of blood flow in the brain) is reduced; ischemia results. When the ... Angiography may be used to detect blood vessel pathology when risk factors such as penetrating head trauma are involved. ... A particularly weak part of the skull that is vulnerable to damage causing extradural haematoma is the pterion, deep in which ... One type of focal injury, cerebral laceration, occurs when the tissue is cut or torn. Such tearing is common in orbitofrontal ...
Cerebral Angiography and Egas Moniz. American Journal of Roentgenology. 1992;359(2):364.[permanent dead link] ... Deep brain stimulation in psychiatric disorders. In: Fangerau, Heiner; Jörg, Fegert; Mareke, Arends (eds). Implanted Minds: The ... who had previously assisted Moniz with his research on cerebral angiography.[n 13][100] The intention was to remove some of the ... For his 1927 development of cerebral angiography, which allowed routine visualisation of the brain's peripheral blood vessels ...
... and cerebral scintigraphy (technetium Tc 99m exametazime). Cerebral angiography is considered the most sensitive confirmatory ... An EEG will therefore be flat, though this is sometimes also observed during deep anesthesia or cardiac arrest.[18] Although in ... For example, although one major medical dictionary[7] considers "brain death" to be synonymous with "cerebral death" (death of ... CT angiography is neither required nor sufficient test to make the diagnosis.[22] ...
These are also very good for AVM deep within the body. The disadvantage is that they are not easily targeted in the vessel. ... Patients who undergo cerebral embolization or portal vein embolization are usually given a general anesthetic. ... The position of the correct artery or vein supplying the pathology in question is located by digital subtraction angiography ( ... Post-embolization arteriogram showing coiled aneurysm (indicated by yellow arrows) of the posterior cerebral artery with a ...
Deep gray matter involvement commonly occurs in ADEM but is very rare in MS. Leptomeningeal involvement is not typical of ... Fluorescein angiography may demonstrate leakage in areas remote from the retinal infarctions. In a recent analysis (Susac et al ... and brain biopsy findings suggest a small vessel vasculopathy leading to arteriolar occlusion and microinfarction of cerebral, ... Though most commonly involving white matter, many patients also had lesions in deep grey matter structures, as well as ...
Diagnostic angiography Cerebral angiography was developed by Portuguese neurologist Egas Moniz at the University of Lisbon, in ... The first combined a deep knowledge of diagnostic radiology with a great ability to solve technical and manual problems. He ... Artico, M (2017). "Egas Moniz: 90 Years (1927-2017) from Cerebral Angiography". Front Neuroanat. 11: 81. doi:10.3389/fnana. ... Cerebral angiography via the femoral artery with particular reference to cerebrovascular disease. Acta Neurol Scand 1967; Suppl ...
In 1927, Egas Moniz introduced cerebral angiography, whereby both normal and abnormal blood vessels in and around the brain ... Its biggest downside is the inability to detect activity more than a few centimeters deep. EROS is a new, relatively ... Uptake of SPECT agent is nearly 100% complete within 30 to 60 seconds, reflecting cerebral blood flow (CBF) at the time of ... SPECT provides a "snapshot" of cerebral blood flow since scans can be acquired after seizure termination (so long as the ...
That is, an electrode array built onto a self-expanding stent, implanted into the brain via cerebral angiography. This pathway ... Whilst deep brain stimulation is increasingly becoming routine for patients with Parkinson's disease, there may be some ... Neural implants such as deep brain stimulation and Vagus nerve stimulation are increasingly becoming routine for patients with ...
However, CT scan can be limited in determining the exact cause of cerebral edema in which cases, CT angiography (CTA), MRI, or ... Deep brain stimulation (DBS) is effective treatment for several neurological and psychiatric disorders, most notably ... Cerebral Edema Cerebral edema is present with many common cerebral pathologies and risk factors for development of cerebral ... Cerebral edema in the context of a malignant middle cerebral artery (MCA) infarct has a mortality of 50 to 80% if treated ...
... provided that the cerebral vessels are excluded. Taking this aspect into consideration, the practical approach follows that of ... conversely the main disadvantage consists in a less ease of filling the deeper ones. Pins and needles/burning sensation, nausea ... CO2 angiography is intended only for peripheral procedures. In case of procedures in the arterious system it is allowed to ... Carbon dioxide angiography is a diagnostic radiographic technique in which a carbon dioxide (CO2) based contrast medium is used ...
Patients who undergo cerebral embolization or portal vein embolization are usually given a general anesthetic. Access to the ... These are also very good for AVM deep within the body. The disadvantage is that they are not easily targeted in the vessel. ... The position of the correct artery or vein supplying the pathology in question is located by digital subtraction angiography ( ... The treatment is used to occlude: Recurrent coughing up of blood Cerebral aneurysm Gastrointestinal bleeding Nosebleed ...
... reflux in the deep cerebral veins, high-resolution B-mode ultrasound evidence of stenosis of the internal jugular vein, absence ... It is still not clear whether magnetic resonance venography, venous angiography, or Doppler sonography should be considered the ... Haacke EM, Garbern J, Miao Y, Habib C, Liu M (April 2010). "Iron stores and cerebral veins in MS studied by susceptibility ... Journal of Cerebral Blood Flow and Metabolism. 33 (5): 657-68. doi:10.1038/jcbfm.2013.31. PMC 3652697. PMID 23443168. Jeffrey S ...
... tract cerebellothalamic tract cerebellum cerebral aqueduct cerebral arterial circle cerebral hemisphere cerebral peduncle ... cystogram dartos DCML decerebrate response declive decomposition of movement decorticate response deep cerebellar nuclei deep ... anatomical position anatomical snuffbox anatomical terms of location anatomical terms of motion anatomy anconeus angiography ... reflex annular ligament annulus of Zinn anomaly anomic aphasia anosognosia ansa cervicalis ansa lenticularis anterior cerebral ...
Automated deep-neural-network surveillance of cranial images for acute neurologic events. Nat Med. 2018 Sep;24(9):1337-1341. ... He is known for brain iron, neurodegeneration, MR angiographyn, brain infarction, Xenon CT regional cerebral blood flow, atomic ... Magnetic Resonance Angiography, Vol 2(4) Neuroimaging Clinics of North America, Drayer BP (Consulting Editor), W.B. Saunders, ... Rigamonti D, Hadley MN, Drayer BP, Johnson PC, Hoenig-Rigamonti K, Knight JT, Spetzler RF (1988). "Cerebral cavernous ...
MR-angiography or CT-angiography, or formal angiography. An echocardiogram may be performed looking for a cardiac source of ... The most frequent location for a watershed stroke is the region between the anterior cerebral artery and middle cerebral artery ... Hemodynamic impairment is thought to be the cause of deep watershed infarcts, characterized by a rosary-like pattern. However ... middle cerebral artery (MCA), and posterior cerebral artery (PCA). Internal watershed strokes (IWS), or subcortical brain ...
The gold standard is cerebral angiography (with or without digital subtraction angiography).[3][14][15] This involves puncture ... Computed tomography angiography, magnetic resonance angiography, invasive angiography. Treatment. Anticoagulation, angioplasty ... MR angiography). They use smaller amounts of contrast and are not invasive. CT angiography and MR angiography are more or less ... The thrombolytic drug is administered either intravenously or during cerebral angiography through a catheter directly into the ...
If a cerebral aneurysm is identified on angiography, two measures are available to reduce the risk of further bleeding from the ... Deep vein thrombosis is prevented with compression stockings, intermittent pneumatic compression of the calves, or both. A ... Aneurysms of the middle cerebral artery and its related vessels are hard to reach with angiography and tend to be amenable to ... and can be confirmed by transcranial doppler or cerebral angiography. About one third of people admitted with subarachnoid ...
Cerebral bypass surgery[edit]. Cerebral bypass surgery was developed in the 1960s in Switzerland by Gazi Yasargil, M.D. When a ... Comparison of computed tomography angiography with digital subtraction angiography in the assessment of clipped intracranial ... Some individuals with a ruptured cerebral aneurysm die from the initial bleeding. Other individuals with cerebral aneurysm ... CT Angiography and MR Angiography for Detection-Prospective Blinded Comparison in a Large Patient Cohort". Radiology. 219 (3): ...
Deep supratentorial veins. In: Newton TH, Potts DJ, eds. Radiology of the Skull and Brain. Vol 2. Angiography. St. Louis: Mosby ... Cerebral veins: Comparative study of CT venography with intraarterial digital subtraction angiography. AJNR Am J Neuroradiol ... CT angiography of cerebral venous circulation: anatomical visualization and diagnostic pitfalls in interpretation. Rofo 1997; ... Diagnostic Value of Multidetector-Row CT Angiography in the Evaluation of Thrombosis of the Cerebral Venous Sinuses. J. Linn, B ...
Deep supratentorial veins. In: Newton TH, Potts DG eds. Radiology of the Skull and Brain, II: Angiography St Louis: Mosby; 1974 ... MR angiography is currently regarded as the best noninvasive method for evaluation of the cerebral venous vasculature (6). The ... Cerebral Veins: Comparative Study of CT Venography with Intraarterial Digital Subtraction Angiography. Stephan G. Wetzel, ... Cerebral Veins: Comparative Study of CT Venography with Intraarterial Digital Subtraction Angiography ...
Cerebral angiography. *Examination of tissue removed from the tumor during surgery or CT scan-guided biopsy to confirm the ... The tumor may extend into deeper parts of the brain. There may be signs of increased pressure in the brain (intracranial ...
11 This classification defines and grades vasculopathy as deep and subcortical white matter hyperintensities, periventricular ... Clinically silent cerebral lesions after cerebral catheter angiography. Rofo. 2001; 173: 300-305. ... Figure 1. MESs during intra-arterial cerebral angiography. Transcranial Doppler sonography of both middle cerebral arteries ... cerebral angiography and transcranial Doppler sonography during angiography were used to evaluate the frequency of cerebral ...
Wolf BS, Newman CM, Schlesinger B. The diagnostic value of the deep cerebral veins in cerebral angiography. Radiology. 1955;64( ... Proton magnetic resonance spectroscopy in deep cerebral venous thrombosis. Clin Neurol Neurosurg. 1998;100(1):27-30.CrossRef ... Diffusion- and perfusion-weighted magnetic resonance imaging in deep cerebral venous thrombosis. Stroke. 1999;30(5):1144-6. ... Stam J. Cerebral venous and sinus thrombosis: incidence and causes. Adv Neurol. 2003;92:225-32.PubMedGoogle Scholar ...
Wolf BS, & Huang YP: The insula and deep middle cerebral venous drainage system: normal anatomy and angiography. Am J ... The insula and deep middle cerebral venous drainage system: normal anatomy and angiography. . Am J Roentgenol Radium Ther Nucl ... The effect of extent of resection on recurrence in patients with low grade cerebral hemisphere Gliomas. . Cancer. 74. :. 1784. ... The effect of extent of resection on recurrence in patients with low grade cerebral hemisphere Gliomas. Cancer 74:1784-1791, ...
Stereotactic biopsy - diagnoses deep-seated brain tumors. *Cerebral Angiography - for visualization of cerebral blood vessels ... Goal - ↓ cerebral edema, lowering volume of CSF, or ↓ blood volume while maintaining cerebral perfusion ... Herniation of brain stem + occlusion of cerebral blood flow = cerebral ischemia & infarction = leading to brain death ... Pathophysiology - Cerebral Response to ↑ ICP*Autoregulation - the brains ability to change the diameter of its blood vessels ...
Cerebral angiography was normal in all patients. A risk factor for cerebral hemorrhage was a long-term daily alcohol intake ... Most DPTH are located deep in the hemispheres and are of small or medium size. Prognosis in the short and long term is good. ... Cerebral angiography showed no evidence of vascular disorders in any patient.. Results DPTH was the fourth most common cause of ... Cerebral angiography was carried out in all cases. Patient follow-up time varied between 14 and 86 months. The Oxford Handicap ...
The cerebral venous outflow impairment in type II fistulas has to be carefully studied by cerebral angiography, including ... The cerebral venous drainage, mainly through the deep venous system and transmeningeal veins, was extremely prolonged. An ... Normal cerebral angiography should be added as a fifth criterion of benign intracranial hypertension. The cerebral venous ... followed by cerebral angiography. This is in agreement with the proposition by Rousseaux et al 20 to add a normal cerebral ...
Angiography. Conventional cerebral angiography is the criterion standard for the evaluation of AVMs (see the images below). The ... Furthermore, angiography can be used to evaluate the venous drainage pattern (superficial, deep, or mixed). In addition, ... On conventional angiography, patent pial AVMs have enlarged cerebral or spinal arteries and veins, rapid AV shunting, and early ... Magnetic resonance angiography (MRA) or CT angiography (CTA) may be adequate for initial or follow-up evaluation of an ...
Cerebral Angiography * Humans * Intracranial Arteriovenous Malformations / diagnostic imaging* * Intracranial Arteriovenous ... Grade I malformations are small, superficial, and located in non-eloquent cortex; Grade V lesions are large, deep, and situated ...
Deep Coma. Introduction. EEG and cerebral angiography is usually mandatory beside clinical examination for the diagnosis of ... Thirteen patients received in the ICU with deep coma between February 2004 and September 2004 were included in the study. GCS ... The reasons for coma were intracranial hemorrhagia, head trauma, cerebral anoxia. After the clinical diagnosis of brain death ...
In up to 75% of patients with Sneddon syndrome, cerebral angiography is abnormal. ... On deep skin biopsy, histopathology demonstrates a non-inflammatory thrombotic vasculopathy involving subcutaneous small and ... Lesions identified by MRI tend to be small, multifocal, and often located in the periventricular deep white matter or pons. ... Sensitivity increases with the number of deep skin biopsies: 27% sensitivity with one, 53% with two, and 80% with three ...
A deep-learning algorithm can provide an effective second assessment of MR angiography studies, helping to catch cerebral ... Deep-learning algorithms need real-world testing. By Erik L. Ridley, AuntMinnie staff writer. November 27, 2018. CHICAGO - ... Although they found that performance of the deep-learning model declined significantly on the real-world cases, they were able ... Other (dense blood vessels, deep sulcus, subdural hygroma): 743 slices/373 cases ...
Computer-aided detection (CAD) based on deep learning can help detect unruptured cerebral aneurysms from MR angiography scans, ... Deep-learning reconstruction improves coronary MR angiography. Wednesday, November 28 , 11:40 a.m.-11:50 a.m. , SSK03-08 , Room ... Deep learning could aid MRI to detect mesial temporal sclerosis. Monday, November 26 , 3:10 p.m.-3:20 p.m. , SSE19-02 , Room ... Using deep learning, MRI may help combat common brain tumor. Tuesday, November 27 , 11:50 a.m.-12:00 p.m. , SSG10-09 , Room ...
Septal cerebral veins originate at the lateral aspect of the anterior horns of the lateral ventricles then pass medially, ... Diagnostic Cerebral Angiography. Lippincott Williams & Wilkins. (1999) ISBN:0397584040. Read it at Google Books - Find it at ... deep veins of the brain * vein of Galen (median prosencephalic vein) *basal vein of Rosenthal ... cerebral veins * superficial veins of the brain * superior cerebral veins (superficial cerebral veins) ...
Deep cerebral vein thrombosis is a subset of cerebral venous thrombosis involving the internal cerebral veins, often coexisting ... Cerebral venous thrombosis and multidetector CT angiography: tips and tricks. Radiographics. 2006;26 Suppl 1 (suppl_1): S5-18. ... Deep cerebral vein thrombosis is a subset of cerebral venous thrombosis involving the internal cerebral veins, often coexisting ... Compared to dural venous sinus thrombosis, deep cerebral venous thrombosis, especially when the internal cerebral veins are ...
Wolf, B. S., Huang, Y. P.: The insula and deep middle cerebral venous drainage system. Normal anatomy and angiography. Am. J. ... Krayenbühl, H.: Cerebral venous thrombosis. The diagnostic value of cerebral angiography. Schweiz. Arch. Neurol. Psychiat. 74, ... Vulnerability of cerebral venous flow following middle cerebral arterial occlusion in cats. In: The Cerebral Veins. An ... Fierstein, S. B., Pribram, H. W., Hieshima, G.: Angiography and computed tomography in the evaluation of cerebral venous ...
Ultimately this allows spatial isolation of the excitation event, enabling deeper imaging into optically thick tissue, while ... Angiography by Laser Surgical Microscopy: Comparison With Xenon Microscopy and Simultaneous Observation of Cerebral Blood Flow ... Sodium Fluorescein Video Angiography (FL-VAG) as an adjunct to resection of Cerebral Arteriovenous Malformations. ... Intraoperative Fluorescence Cerebral Angiography by Laser Surgical Microscopy: Comparison With Xenon Microscopy and ...
Electrically tunable lens integrated with optical coherence tomography angiography for cerebral blood flow imaging in deep ... Electrically tunable lens integrated with optical coherence tomography angiography for cerebral blood flow imaging in deep ... limitation in conventional OCT systems for OCT angiography (OCTA) in a mouse cerebral cortex. The ETL provides fast and dynamic ... A Deep Learning Approach to Denoise Optical Coherence Tomography Images of the Optic Nerve Head Explore Nature Publishing Group ...
Conventional angiography of the 4 cerebral arterial axes are the reference standard for imaging br... ... and deep cerebral veins. In conventional angiography, 2 patients showed, at the level of the anterior and middle cerebral ... followed by cerebral angiography. In our material, CT angiography showed opacification of A2-ACA and M2 or M3-MCA in 10 ... Conventional angiography of the 4 cerebral arterial axes are the reference standard for imaging brain death. Thus, it is an ...
... angiography procedure described here allows intraoperative confirmation of the patency of perforating arteries located deep ... Feindel WYamamoto YLHodge CP: Red cerebral veins and the cerebral steal syndrome. Evidence from fluorescein angiography and ... Red cerebral veins and the cerebral steal syndrome. Evidence from fluorescein angiography and microregional blood flow by ... Yannuzzi LARohrer KTTindel LJSobel RSCostanza MAShields W: Fluorescein angiography complication survey. Ophthalmology 93:611- ...
Cerebral angiography showed a right moyamoya pattern and an ipsilateral dural AVF fed by branches of the external carotid ... This extremely rare coincidental presentation may have deeper pathogenic implications. Scott, R. Michael; Smith, Edward R. ( ... These vessels are the ACA (anterior cerebral artery), MCA (middle cerebral artery), and ICA (internal carotid artery). The ... anterior cerebral artery and middle cerebral artery Stage 4 Minimization of the moyamoya and defects of the posterior cerebral ...
The left middle cerebral artery (MCA) shown in the magnetic resonance angiography (MRA) is slimmer (white arrow) compared to ... Coronal TI image demonstrated enlargement of left lateral ventricle and wider and deeper left lateral sulcus (gray arrow); (E) ... But we noticed that the left Middle Cerebral Artery (MCA) shown in the MRA is slimmer (Figure 1(E)) compared to the right ... Taken together, the hypothesis which seems to be capable of coincidently interpreting both the cerebral atrophy and the slimmer ...
... known as deep learning can help physicians detect potentially life-threatening cerebral aneurysms on CT angiography, according ... Melding biology and physical sciences yields deeper understanding of cancer. An evolving understanding of cancer that ... AI helps detect brain aneurysms on CT angiography. A powerful type of artificial intelligence ...
... known as deep learning can help physicians detect potentially life-threatening cerebral aneurysms on CT angiography, according ... Stretchable wireless sensor could monitor healing of cerebral aneurysms. A wireless sensor small enough to be implanted in the ... AI helps detect brain aneurysms on CT angiography. A powerful type of artificial intelligence ...
... and the patient entered a deep coma. Magnetic resonance angiography (MRA) revealed multiple vasoconstrictions in his brain. The ... In this case of cerebral malaria, the MRA findings indicated the involvement of reversible cerebral vasoconstriction syndrome. ... Complications of cerebral malaria developed within 1 day after the initiation of therapy with intravenous quinine, ... Cerebral malaria is a severe complication of falciparum malaria that occurs infrequently in adults. Here, we describe the case ...
Magnetic resonance imaging and angiography of the brain or cerebral angiography may be instructive when assessing for central ... Doppler ultrasound and ventilation perfusion scans may be required if deep vein thrombosis and pulmonary embolus is suspected. ... Deep vein thrombosis occurs in about 10% of patients with ANCA disease. ...
... deep brain stimulation, orexin-A, orexin-B, tract-based spatial statistics, single-photon emission computer tomography studies ... magnetic resonance angiography; ONS, occipital nerve stimulation; rCRB, regional cerebral blood flow; ROI, region of interest; ... Clelland CD, Zheng Z, Kim W, Bari A, Pouratian N. Common cerebral networks associated with distinct deep brain stimulation ... cerebral networks, neuromodulation, central modulation, deep brain stimulation, orexin-A, orexin-B, tract-based spatial ...
Brain death implies the permanent absence of cerebral and brainstem functions. criteria for dx clinically confirmatory dx ... Brain Death Confirmatory Testing 24 May 2016 brain death No Intra- Cranial FlowNormal Cerebral Angiography ... Deep tendon reflexes, Babinskis reflex  Facial myokymias 24 May 2016 brain death ... Cerebral Angiography  PET : Glucose Metabolic Studies  Dynamic Nuclear Scan  Somato-Sensory Evoked Potential 24 May 2016 ...
  • Arterial and occipital arterial feeders extend to the nidus via distal branches of the middle cerebral artery. (
  • In our patients, results of CT angiography fulfill the criteria proposed by the French Society of Neuroradiology: absence of perfusion of M4 middle cerebral artery segments (M4-MCA) and deep cerebral veins. (
  • In conventional angiography, 2 patients showed, at the level of the anterior and middle cerebral artery, a phenomenon already described as stasis filling. (
  • Aneurysms were located in the internal carotid artery in 12 patients, middle cerebral artery in six, anterior cerebral artery in three, basilar artery bifurcation in one, and junction of the vertebral artery (VA) and posterior inferior cerebellar artery in one. (
  • CT angiography of the head confirmed a right middle cerebral artery (MCA) ischemic stroke. (
  • Brain computed tomography (CT) showed a low density area in the right cortical and subcortical frontotemporoparietal regions and right insular cortex representing ischemic lesions in the right middle cerebral artery (MCA) territory (Fig. 1 ). (
  • Brain computed tomography showing, at day 3 of deficit, a low density area in the right cortical and subcortical frontotemporoparietal regions and right insular cortex representing ischemic infarcts in the territory of the right middle cerebral artery ( a ). (
  • However, stenting of middle cerebral artery has been limited because of difficulty with tracking stents across the carotid siphon. (
  • We report a case of successful percutaneous stenting of a symptomatic middle cerebral artery stenosis using a balloon-expandible flexible coronary stent. (
  • A 63-year-old woman had a previous decompressive craniectomy after a right middle cerebral artery infarction. (
  • Here, the occurrence of bilateral diffuse intracerebral hemorrhagic infarction following routine cranioplasty in a 68-year-old woman who underwent a DCR 3 months previously due to a right middle cerebral artery (MCA) territory infarction is reported and the possible pathogenesis is discussed. (
  • The initial non-contrast CT is performed in order to determine the presence of intracranial hemorrhage, a space-occupying lesion, signs of cerebral edema, and/or evidence of a large middle cerebral artery distribution infarct or an infarct of many hours duration. (
  • Patients in PROACT II [ 2 ], however, were selected based on evidence of arterial occlusions at the M1 or M2 levels of the middle cerebral artery by conventional arteriography, and a significant clinical benefit was observed when thromboly-sis was initiated up to 6 h from symptom onset (median time to treat, 5.3 h). (
  • Cerebral catheter digital subtraction angiography (DSA) is not generally used in the primary diagnostic decision-making process and is usually performed only if local thrombolysis is to be considered. (
  • Our objective was to compare the reliability of CT venography with intraarterial digital subtraction angiography (DSA) in imaging cerebral venous anatomy and pathology. (
  • However, the sensitivity and specificity of CT venography to depict venous structures in comparison with digital subtraction angiography (DSA), the established standard of reference, is not known. (
  • Intra-arterial digital subtraction angiography (IA-DSA) has remained the "gold standard" in the assessment of cerebral vessels. (
  • Digital subtraction angiography (DSA) is still the standard of reference for the assessment of cerebral venous thrombosis. (
  • Selective intra-arterial digital subtraction angiography was undertaken by a femoral artery approach in both internal carotid arteries in seven patients, in both vertebral arteries in six patients, and in one vertebral artery in one patient. (
  • The first applications of CT angiography were for the evaluation of the circle of Willis and the detection of aneurysms (1, 2) . (
  • In such disorders as vasculitis or intracranial aneurysms, the sensitivity and specificity of such noninvasive techniques as CT angiography and MR angiography do not suffice to replace intra-arterial angiography. (
  • A deep-learning algorithm can provide an effective second assessment of MR angiography studies, helping to catch cerebral aneurysms that were missed by. (
  • Influenced by the high morbidity and mortality associated with arterial aneurysms, neurosurgeons since the 1950s have been concerned that cerebral arteriovenous malformations (AVM) bear a high risk of hemorrhage. (
  • OAK BROOK, Ill. - A powerful type of artificial intelligence known as deep learning can help physicians detect potentially life-threatening cerebral aneurysms on CT angiography, according to a study published in the journal Radiology . (
  • Cerebral aneurysms are weakened areas of blood vessels in the brain. (
  • CT angiography is usually the first choice for evaluating cerebral aneurysms. (
  • The exam is highly accurate, but cerebral aneurysms can be overlooked on the initial assessment due to their small size and the complexity of the blood vessels in the brain. (
  • Cerebral aneurysms are among those small lesions that may be overlooked on the routine assessment of radiological images. (
  • Deep learning offers tremendous potential as a supplementary tool for a more accurate interpretation of cerebral aneurysms. (
  • In the new study, Dr. Long and colleagues developed a fully automated, highly sensitive algorithm for the detection of cerebral aneurysms on CT angiography images. (
  • They used CT angiograms from more than 500 patients to train the deep learning system, and then they tested it on another 534 CT angiograms that included 649 aneurysms. (
  • The developed deep-learning system has shown excellent performance in detecting aneurysms," Dr. Long said. (
  • We found some aneurysms that were overlooked by the human readers on the initial reports, but they were successfully depicted by the deep-learning system. (
  • The results suggest that the deep learning algorithm has promise as a supportive tool for detecting cerebral aneurysms with a potential to be used clinically for a second opinion during interpretation of head CT angiography images. (
  • At this time, the role of this deep-learning system, which has been trained to recognize aneurysms, is to give suggestions to the human reader to improve their performance and reduce mistakes," Dr. Long said. (
  • Deep Learning for Detecting Cerebral Aneurysms with CT Angiography. (
  • Here, as a surgical armamentarium for the treatment of cerebral aneurysms, the history and present status of the keyhole approach and the use of neuroendoscopy are reviewed, including our clinical data. (
  • Cerebral aneurysms are representative cerebrovascular diseases. (
  • The treatment paradigm of cerebral aneurysms has changed since the introduction of detachable coils for endovascular therapy approximately 20 years ago. (
  • The authors reviewed the historical, technical, and clinical perspectives of the keyhole approach and neuroendoscopy for the treatment of cerebral aneurysms. (
  • Question How does augmentation with a deep learning segmentation model influence the performance of clinicians in identifying intracranial aneurysms from computed tomographic angiography examinations? (
  • Meaning This study suggests that the performance of clinicians in the detection of intracranial aneurysms can be improved by augmentation using deep learning segmentation models. (
  • Objective To develop and apply a neural network segmentation model (the HeadXNet model) capable of generating precise voxel-by-voxel predictions of intracranial aneurysms on head computed tomographic angiography (CTA) imaging to augment clinicians' intracranial aneurysm diagnostic performance. (
  • Conclusions and Relevance The deep learning model developed successfully detected clinically significant intracranial aneurysms on CTA. (
  • 1 Computed tomographic angiography (CTA) is the primary, minimally invasive imaging modality currently used for diagnosis, surveillance, and presurgical planning of intracranial aneurysms, 2 , 3 but interpretation is time consuming even for subspecialty-trained neuroradiologists. (
  • Segmentation of the thrombus of giant intracranial aneurysms from CT angiography scans with lattice Boltzmann method. (
  • Computed Tomography Angiography (CTA) plays an essential role in the diagnosis, treatment evaluation, and monitoring of cerebral aneurysms. (
  • Angiography will also detect possible aneurysms and arteriovenous malformations that can be associated with moyamoya disease. (
  • Three blinded readers were asked to identify the cerebral sinuses and veins in MDCTA and to evaluate the presence of CVST in MDCTA. (
  • With MDCTA, the venous sinuses could be identified in 99.2% and the cerebral veins in 87.6% of cases. (
  • Further studies are needed to evaluate the diagnostic potential of MDCTA in specific subsets of the general entity of CVST such as cortical venous thrombosis, thrombosis of the cavernous sinus, and thrombosis of the internal cerebral veins. (
  • A data base search was performed to identify all patients who presented at our hospital with clinical signs and symptoms suggestive of a thrombotic occlusion of the cerebral veins or sinuses between June 2002 and December 2005. (
  • Wolf BS, Newman CM, Schlesinger B. The diagnostic value of the deep cerebral veins in cerebral angiography. (
  • Septal cerebral veins originate at the lateral aspect of the anterior horns of the lateral ventricles then pass medially, inferior to the genu of the corpus callosum . (
  • The septal veins drain the corpus callosum and deep medullary frontal white matter. (
  • Deep cerebral vein thrombosis is a subset of cerebral venous thrombosis involving the internal cerebral veins , often coexisting with cortical vein thrombosis or dural venous sinus thrombosis , and with different clinical presentations relying on which segment is involved. (
  • Compared to dural venous sinus thrombosis, deep cerebral venous thrombosis, especially when the internal cerebral veins are involved, carries a poorer prognosis 3 . (
  • Di Chiro, G.: Angiographie Patterns of Cerebral Convexity Veins and Superficial Dural Sinus. (
  • In: The Cerebral Veins. (
  • Huang, Y. P., Wolf, B. S.: Veins of the white matter of the cerebral hemispheres (the medullary veins): Diagnostic importance in carotid angiography. (
  • Although small and deep nidi and those with deep and single draining veins tended to present themselves with hemorrhage, only nidi with single draining veins and those ruptured before were more likely to bleed once the AVM had been diagnosed. (
  • The first part of the book describes the normal anatomy of the cerebral arteries and veins, with attention to morphological aspect, embryological development, function, and vascular territories. (
  • Cerebral angiography demonstrates decreased cerebral venous drainage and dilation of the deep cerebral veins.64,65 A variety of vascular abnormalities, including thrombotic lesions, dural venous sinus abnormalities, and arteriovenous malformations, have been observed in approximately one third of patients. (
  • After four months, all deep cerebral veins and cavernous sinuses, 94% of superior sagittal sinuses, 80% of straight sinuses, 73% of jugular veins, 58% of transverse sinuses, and 41% of sigmoid sinuses had recanalised. (
  • 5 MRI and MRV were only done at 12 months in patients who had residual thrombosis of cerebral sinuses and veins at the four months follow up. (
  • A cerebral arteriovenous malformation (cerebral AVM, CAVM, cAVM) is an abnormal connection between the arteries and veins in the brain-specifically, an arteriovenous malformation in the cerebrum. (
  • Cerebral thrombosis most often refers to thrombus formation within cerebral arteries, and the cerebral venous thrombosis refers to clot formation within cerebral veins and sinuses. (
  • However, because of the length of procedure, and because the arteries and veins of the spine tend to me much smaller than of the brain, spinal angiography is usually done under anesthesia. (
  • Because the fluorescein angiography procedure described here allows intraoperative confirmation of the patency of perforating arteries located deep inside the surgical field, it can be practically used for preventing unexpected cerebral infarction during aneurysm surgery. (
  • Cambria, S.: Thrombosis of the vein of Labbé with haemorrhagic cerebral infarction. (
  • or (ii) employ HBO immediately at the island clinic and observe him for evidence of cerebral infarction and the need for subsequent transport. (
  • 6 In tuberculous meningitis, the vasculitis is most prominent in the penetrating vessels of carotid territory, which results in the infarction of deep white matter. (
  • Editors: Salamon, G. Cerebral angiography is frequently normal in patients with np sle including those with cerebral infarction on mri. (
  • The detection of a clinically significant carotid stenosis represents an important first step in the prevention of cerebral infarction. (
  • Reduced visualization of cerebral infarction on diffusion-weighted images with short diffusion times. (
  • Bilateral Multiple Intracerebral Hemorrhagic Infarction after Cranioplasty in a Patient with Cerebral Infarction: Case Report. (
  • Subsequent magnetic resonance (MR) diffusion images and MR angiography showed a right MCA territory infarction and revealed total occlusion of the right ICA (Figs. 1A and 1B). (
  • Sodium Fluorescein Video Angiography (FL-VAG) as an adjunct to resection of Cerebral Arteriovenous Malformations. (
  • Background and Purpose- To evaluate the hemorrhage rates of cerebral arteriovenous malformations (AVM) and the risk factors of hemorrhage before and after Gamma Knife radiosurgery (GKS). (
  • arteriovenous fistula MR angiography, and especially Gd-enhanced 3D MRA, has recently emerged and offers excellent visualization of venous morphology from multiple orientations. (
  • Cerebral dural arteriovenous fistulas: clinical and angiographic correlation with a revisited classification of venous drainage. (
  • Muller-Forell W, Valavanis A. How angioarchitecture of cerebral arteriovenous malformations shoud influence the therapeutic considerations. (
  • I have been asked to see this patient in cerebrovascular subspecialty consultation by Dr. for an opinion about whether the patient should have a cerebral angiogram to exclude an arteriovenous cause of his pulsatile tinnitus. (
  • Cerebral arteriovenous malformations (AVM) are rare but potentially devastating vascular lesions that often affect young adults. (
  • Similar to angiography of the brain, where a catheter is placed into an artery supplying the brain parenchyma, such as internal carotid or vertebral artery, and contrast material injected to directly visualize brain arteriovenous system, - spinal angiography accomplishes the same goal for arteries which supply the spine and paraspinal regions. (
  • Cerebral angiography demonstrated dural arteriovenous fistula (AVF) involving superior sagittal sinus (SSS), which was associated with SSS occlusion on the posterior one third. (
  • The diagnosis of cerebral venous and sinus thrombosis (CVST) as a rare but important cause of stroke is challenging. (
  • Cerebral venous and sinus thrombosis (CVST) is a rare but important cause of stroke mostly affecting young adults. (
  • Einhäupl KM, Masuhr F. Cerebral venous and sinus thrombosis - an update. (
  • As such please refer to the cerebral venous thrombosis article for a general discussion. (
  • Deep cerebral vein thrombosis may occur at any age. (
  • Cerebral Venous Thrombosis and Multidetector CT Angiography: Tips and Tricks. (
  • Prognosis of Cerebral Vein and Dural Sinus Thrombosis: Results of the International Study on Cerebral Vein and Dural Sinus Thrombosis (ISCVT). (
  • Thrombosis of the Internal Cerebral Vein Associated with Transient Unilateral Thalamic Edema: A Case Report and Review of the Literature. (
  • The purpose of this study was to evaluate the use of MR venography in the depiction of the normal intracranial venous anatomy and its variants, to assess its potential pitfalls in the diagnosis of dural venous sinus thrombosis, and to compare the findings with those of conventional catheter angiography. (
  • To investigate recanalisation in the first 12 months after cerebral venous thrombosis. (
  • 33 consecutive patients presenting with cerebral venous thrombosis were enrolled in the study. (
  • Cerebral MRI and MRV were done at four months and repeated after 12 months if venous thrombosis persisted. (
  • No patient suffered recurrent cerebral venous thrombosis, deep vein thrombosis, or pulmonary embolism during follow up. (
  • The results suggest that recanalisation only occurs within the first four months following cerebral venous thrombosis and not thereafter, irrespective of oral anticoagulation. (
  • Cerebral venous thrombosis is an infrequent disease that mainly affects young to middle aged patients. (
  • 4 However, combined magnetic resonance imaging (MRI) and magnetic resonance venography (MRV) have replaced carotid angiography in diagnostic work up of patients with a suspicion of cerebral venous thrombosis because these techniques are non-invasive and reliable, and also provide information about the brain parenchyma. (
  • Our aim in the present study was to investigate the recanalisation of cerebral venous thrombosis after four and 12 months of follow up, using cranial MRI and MRV. (
  • Consecutive patients with cerebral venous thrombosis diagnosed by MRI and MRV or DSA, without a previous history of neurological disease, were prospectively included in the study. (
  • The carotid CTA (neck CTA) is most often combined with an intracranial CTA in order to exclude a proximal thrombosis or embolization within the anterior cerebral circulation. (
  • Subsequently, she was diagnosed with extensive right deep venous thrombosis (DVT). (
  • What is Cerebral Thrombosis? (
  • A cerebral thrombosis is a blood clot that forms within one of the cerebral vessels, diminishing the blood, oxygen , and nutrient supplies to the brain parenchyma. (
  • The two types of cerebral thrombosis include small-vessel thrombosis and large-vessel thrombosis. (
  • Small-vessel thrombosis is used for thrombosis of smaller and deeper arteries, such as lacunar arteries. (
  • Large-vessel thrombosis is used for thrombosis of bigger arteries, such as the middle cerebral and carotid artery. (
  • The symptoms of cerebral thrombosis are also the symptoms of stroke. (
  • Preventing cerebral thrombosis involves the modification of its risk factors, which include hypertension, diabetes , smoking, and alcohol consumption. (
  • Deep vein thrombosis in the cerebral angiography n. (
  • Magnetic resonance venography (MRV) is an accurate, noninvasive technique used to detect deep vein thrombosis. (
  • CT Cerebral Venous Angiography has revealed Deep Cerebral Venous Sinus Thrombosis. (
  • Teaching point here is that Cerebral Venous Thrombosis can manifest as hemorrhage. (
  • Another important teaching point is that large infarctions in the basal ganglia can be associated with Deep Cerebral Sinus Thrombosis. (
  • Given the asymmetry and the size of the jugular foramina, this is most likely a long-standing situation and less likely to be due to sequela of deep sinus thrombosis. (
  • Resumo em inglês The incidence of deep venous thrombosis (DVT) in children (0-18 years old) is low. (
  • Resumo em inglês Cerebral venous thrombosis (CVT) is a vascular disease with many clinical manifestations and possible etiologies (local, systemic or idiopathic). (
  • In the second stage, patients experience recurrent episodes of strokes or transient ischaemic attacks due to ischaemia in the zones perfused by the middle or posterior cerebral arteries. (
  • The authors performed fluorescein cerebral angiography in patients after aneurysm clip placement to confirm the patency of the parent artery, perforating artery, and other arteries around the aneurysm. (
  • The disease causes constrictions primarily in the internal carotid artery, and often extends to the middle and anterior cerebral arteries, branches of the internal carotid artery inside the skull. (
  • CT angiography of the cerebral arteries (also known as a CTA carotids or an arch to vertex angiogram) is a noninvasive technique allows visualization of the internal and external carotid arteries and vertebral arteries and can include just the intracranial compartment or also extend down to the arch of the aorta. (
  • Atlas of arteries of the brain on a Time-Of-Flight (TOF) Magnetic Resonance Angiography â ¦ This is a revised and enlarged edition of Cerebral Angiography published in 2011. (
  • Reversible cerebral vasoconstriction syndrome (RCVS) refers to a number of disorders characterized by severe and sudden-onset ("thunderclap") headaches and angiographic features of reversible, segmental, multifocal vasoconstriction of cerebral arteries. (
  • Reversible cerebral vasoconstriction syndrome (RCVS) refers to a number of disorders characterized by severe and sudden-onset ("thunderclap") headaches and the angiographic feature of segmental, multifocal vasoconstriction of cerebral arteries that resolves within 12 weeks of presentation [ 1 , 2 ]. (
  • In addition, endoscopic indocyanine green fluorescence angiography is useful to detect and correct any compromise of the perforators and parent arteries, and incomplete clipping. (
  • Lysosomal α-glucosidase deficiency (Pompe disease) not only leads to glycogen accumulation in skeletal muscle, but also in the cerebral arteries. (
  • Moyamoya disease is a cerebrovascular occlusive disorder of unknown origin resulting from progressive stenosis of the distal intracranial internal carotid arteries (ICA) and the proximal branches of the anterior and middle cerebral arteries. (
  • We report the use of an electrically tunable lens (ETL) in a 1.3 μm spectral-domain optical coherence tomography (SD-OCT) system to overcome the depth of focus (DOF) limitation in conventional OCT systems for OCT angiography (OCTA) in a mouse cerebral cortex. (
  • The ETL provides fast and dynamic control of the axial focus of the probe beam along the entire range of the mouse cortex, upon which we performed cerebral blood flow imaging of all cortical layers by stitching the OCTA images automatically captured at six focal depths. (
  • Florbetapir uptake and PiB retention were strongly correlated in patients with CAA both globally within cerebral cortex and regionally in occipital, frontal, temporal, and parietal cortices. (
  • T 2 -weighted transverse magnetic resonance images of the brain demonstrating high signal intensity in the cerebellar white matter and cortex (left), bilaterally in the pallidum (middle) and in the white matter of the cerebral hemispheres (right). (
  • White matter (WM) consists of myelinated axons that arise from either the neuronal cell bodies in the cerebral cortex or the nuclei of deep gray matter structures. (
  • Indeed, Three-Dimensional ANgiography permits one to identify deep vascular segments ("laminae vascularis") buried in the sulcal walls of the invaginated cortex, thereby indicating the location, the depth and the direction of a given sulcus. (
  • A brain MRI showed multiple bilateral high signal intensities in the both deep white matter and the parieto-occipital cortex. (
  • Cerebral aneurysm rebleed with ventricular breakthrough captured by four-dimensional CT angiography. (
  • However, LP is often required if subarachnoid hemorrhage (bleeding from a cerebral aneurysm) is suspected. (
  • In this chapter, we briefly discuss the fundamental cerebral venous anatomy and intracranial venous interventions under specific diagnostic and therapeutic categories. (
  • Cerebral venography and manometry in idiopathic intracranial hypertension. (
  • Normal cerebral angiography should be added as a fifth criterion of benign intracranial hypertension. (
  • Consequently, patients with intracranial hypertension must be treated, even agressively, to obliterate the fistula or at least to reduce the arterial flow and to restore a normal cerebral venous drainage. (
  • According to Johnston et al , 3 pseudotumor syndrome may be separated into one group of primary pseudotumor syndrome without benign intracranial hypertension or with a recognised precipitating cause, and a second group of secondary pseudotumor syndrome in which the underlying mechanism is either impairment of the cerebral venous drainage, or alterations in the composition of the CSF. (
  • The reasons for coma were intracranial hemorrhagia, head trauma, cerebral anoxia. (
  • In a small study, researchers reported that florbetapir-PET accurately identified vascular amyloid in patients with cerebral amyloid angiopathy (CAA)-related intracranial hemorrhage and accurately distinguished CAA-related intracranial hemorrhage from hypertensive intracranial hemorrhage. (
  • Cerebral Angiography: Normal Anatomy and Vascular Pathology (English Edition) eBook: Gianni Boris Bradac: Kindle Store Cerebral angiography is an interventional procedure for the diagnosis and/or treatment of intracranial pathology. (
  • Aim of this clinical study is to establish a novel technique, the so called intraoperative fluorescence angiography, for kidney graft perfusion visualization during the transplant procedur. (
  • The diagnostic modalities that are to be considered in the ED evaluation of stroke patients include Cranial CT, CT angiography, MRI (including diffusion and perfusion weighting studies), MR angiography, cerebral angiography, carotid Doppler ultrasonography, and cardiac echocardiography. (
  • Post-operatively, angiography is typically used to assess neovascularization and cortical perfusion. (
  • Cerebral blood flow can be monitored in children diagnosed with moyamoya pre- and post-operatively with transcranial Doppler ultrasonography, CT and MR perfusion imaging, xenon enhance CT, positron-emission tomography, and single-photon-emission CT. (
  • Children with moyamoya exhibit a characteristic pattern of high voltage, monophasic slow waves following the end of hyperventilation known as the re-buildup phenomenom, which is thought to represent a diminished cerebral perfusion reserve. (
  • Rapid imaging with magnetic resonance imaging, diffusion weighted imaging, perfusion imaging and angiography are being incorporated into phase II and phase III stroke trials to optimize patient selection based on positive imaging diagnosis of the ischemic pathophysiology specifically related to a drug's mechanism of action and as a direct biomarker of the effect of a treatment's effect on the brain. (
  • The appeal of MRI methods is that, whereas the standard CT examination of acute ischemic stroke will typically appear normal in the first hours after stroke onset, the methods of magnetic resonance angiography, perfusion weighted imaging (PWI), and diffusion weighted imaging (DWI) provide information on arterial patency, tissue blood flow, and parenchymal injury from the earliest times after onset of ischemic symptoms in a brief, non-invasive examination. (
  • Three main techniques are used to visualize the brain and search for AVM: computed tomography (CT), magnetic resonance imaging (MRI), and cerebral angiography. (
  • Magnetic resonance angiography or computed tomography angiography may also be performed. (
  • The file was created from a Computed Tomography Angiography (CTA) of a relatively healthy patient. (
  • These dimensions have been assessed in the modern era of stroke clinical trials by clinical criteria at the bedside, usually aided by the exclusion of cerebral hemorrhage or other non-ischemic pathology by non-contrast computed tomography (CT) scan as the only imaging tool required. (
  • EEG and cerebral angiography is usually mandatory beside clinical examination for the diagnosis of brain death. (
  • When confirmatory examinations are required among BD patients for whom the clinical diagnosis remains essential, it may be an interesting alternative to conventional cerebral angiography, which is more invasive and constraining, and when EEG is unavailable or inadequate. (
  • To report the clinical presentation of malarial retinopathy in an adult, emphasizing the importance of this diagnosis for the clinical suspicion and prognosis of cerebral malaria. (
  • In endemic areas, the diagnosis of cerebral malaria is hampered by the high rate of Plasmodium falciparum parasitemia not associated with disease, commonly leading to underdiagnosis [2] . (
  • We present a case of malaria encephalopathy with characteristic ophthalmological features which highlights the importance of this diagnosis for the clinical suspicion and prognosis of cerebral malaria, in order to provide an early and targeted treatment for this condition. (
  • Diagnosis was made by magnetic resonance imaging (MRI) and magnetic resonance venography (MRV) or catheter angiography. (
  • Cerebral angiography confirmed the diagnosis of moyamoya disease. (
  • It is very rarely used for stroke diagnosis, often only when cerebral vasculitis is suspected. (
  • Importance Deep learning has the potential to augment clinician performance in medical imaging interpretation and reduce time to diagnosis through automated segmentation. (
  • Employing CT scans, MRIs, ultrasound and other technologies, we provide a deeper, closer view of bone, muscle and vital organs and their functions to help our colleagues provide accurate, timely diagnosis of your problem. (
  • Conventional angiography is the gold standard for both the diagnosis and surgical planning for patients with suspected moyamoya disease. (
  • Methods and Results- In a prospective study, diffusion-weighted magnetic resonance imaging (DW-MRI) before and after intra-arterial cerebral angiography and transcranial Doppler sonography during angiography were used to evaluate the frequency of cerebral embolism. (
  • Magnetic resonance angiography (MRA) revealed multiple vasoconstrictions in his brain. (
  • Cerebral MRI and cross sectional time of flight (TOF) MRV studies were done on 1.5T magnetic resonance scanners. (
  • Carotid duplex ultrasonography, computed tomographic angiography (CTA), or magnetic resonance angiography (MRA) of the carotid artery may be most appropriate in a specific case (see the images below). (
  • Magnetic resonance angiography demonstrated normal proximal cerebral circulation. (
  • Contribution of stereotactic neuro-radiological procedures and of magnetic resonance imaging to the "in vivo" anatomical study of cerebral sulci and convlolutions. (
  • They then turn backwards and traverse along the septum pellucidum and enter the internal cerebral vein behind the foramen of Monro . (
  • Treatment with abciximab was accomplished and the mechanical lysis of the thrombus was made obtaining restoration of cerebral vein flow. (
  • After the angiogram is concluded the catheter is removed and the small opening made to introduce it is closed by manual compression or by a â ¦ Angiography is a general term for the radiographic examination of the blood vessels. (
  • It produces a cerebral angiogram, or an image that can help your doctor find blockages â ¦ This revised and enlarged edition of Cerebral Angiography, which includes new angiographic studies and illustrative drawings, offers detailed guidance on diagnostic use of the procedure. (
  • There is no other reason in the face of a normal MRA to pursue an angiogram based purely on the pulsatile tinnitus alone, the cause of which is not infrequently unknown even after cerebral angiography. (
  • This examination developed widely these last years thanks to a new generation of multirow CT, which allows visualization of opacified cerebral vessels. (
  • On conventional MR angiography, these collateral vessels have the appearance of a "puff of smoke" (described as "もやもや (moyamoya)" in Japanese). (
  • The first part of the book depicts in detail the normal appearance of the cerebral vessels on angiographic studies. (
  • IF ONE WISHES to gain skill in the interpretation of cerebral angiograms, first he must study the anatomy of vessels relative to the surrounding brain. (
  • These factors that make up the Virchow's triad also contribute to clot formation and obstruction of the cerebral vessels. (
  • Pathological investigations have found accumulations of peri-venous plasma and blood suggesting that excessive cerebral venous pressure has disrupted vessels, initiating the intra-ventricular bleeding observed. (
  • This .stl file represents the largest vessels of the cerebral circulation, specifically around the Circle of Willis. (
  • Children affected with moyamoya disease typically present with signs and symptoms of cerebral ischemia secondary to transient ischemic attacks and/or cerebral infarctions. (
  • Using DSA as the standard of reference, MPR images had an overall sensitivity of 95% (specificity, 19%) and MIP images a sensitivity of 80% (specificity, 44%) in depicting the cerebral venous anatomy. (
  • Cerebral MR venography: normal anatomy and potential diagnostic pitfalls. (
  • Cerebral Angiography: Normal Anatomy and Vascular Pathology di Bradac, Gianni Boris su - ISBN 10: 3642156770 - ISBN 13: 9783642156779 - Springer Verlag - 2011 - Rilegato This anatomy module of e-Anatomy was designed and created by MD Micheau Antoine and MD Hoa Denis, radiologists in Montpellier (France). (
  • Cerebral Angiography: Normal Anatomy and Vascular Pathology (English Edition) eBook: Gianni Boris Bradac: Kindle Store Utilizziamo cookie e altre tecnologie simili per migliorare la tua esperienza di acquisto, per fornire i nostri servizi, per capire come i nostri clienti li utilizzano in modo da poterli migliorare e per visualizzare annunci pubblicitari. (
  • This book offers detailed guidance on the diagnostic use of cerebral angiography based on precise description of the angiographic appearances of normal anatomy and pathological conditions. (
  • Cerebral Angiography: Normal Anatomy and Vascular Pathology Features: Cerebral Angiography By (author): Gianni Boris Bradac Cerebral Angiography is a comprehensive and well-illustrated guide to the diagnostic use of cerebral angiography. (
  • In this third edition, every chapter has been thoroughly revised and enlarged to reflect new knowledge and Cerebral Angiography : Normal Anatomy and Variations in Adults and Children By JOHN R. BENTSON, M.D., AND GABRIEL H. WILSON, M.D. Cerebral Angiography. (
  • Anatomy of the cerebral venous system. (
  • German researchers plan to show how 3D contrast-enhanced MR angiography can help clinicians with vascular intervention before prostatic artery embolization. (
  • Contrast-enhanced MR angiography ( MRA ) has been increasingly used in the evaluation of spinal vascular malformations. (
  • These women frequently experience transient ischaemic attacks (TIA), cerebral hemorrhage, or may not experience any symptoms at all. (
  • Right eye indirect ophthalmoscopy revealed round deep layer retinal hemorrhage, with one disc diameter of radius, in the superior temporal arcade (Figure 1 [ Fig. 1] ). (
  • Left eye indirect ophthalmoscopy showed a foveal hemorrhage, several superficial hemorrhages in the interpapillomacular bundle ( Figure 2 [ Fig. 2] ) and a deep white-centered peripheral hemorrhagic lesion (Figure 3 [ Fig. 3] ). (
  • Florbetapir, a Food and Drug Administration - approved positron emission tomography (PET) tracer - appears to highly accurately label vascular amyloid in patients with cerebral amyloid angiopathy (CAA)-related intracerebral hemorrhage (ICH), according to a report that appeared in the September 7 online edition of Neurology . (
  • Patient 1 presented comatose with a 9 × 4 × 6.6 cm left deep intraparenchymal hemorrhage (IPH) and 1 cm midline shift. (
  • there was no arterial/venous occlusion, deep venous occlusion or congestion (Fig. 4 A, B, C, D). The level of consciousness gradually improved. (
  • Though the exact pathogenesis of this disorder is unknown, the retinal and brain biopsy findings suggest a small vessel vasculopathy leading to arteriolar occlusion and microinfarction of cerebral, retinal and cochlear tissue. (
  • In this case of cerebral malaria, the MRA findings indicated the involvement of reversible cerebral vasoconstriction syndrome. (
  • But there are many situations where diagnostic uncertainty exists - specifically patients with only one lobar brain bleed without any other hemorrhagic pathology, many older adults with only few microbleeds but no symptomatic bleed, patients with hemorrhagic lesions in both deep and lobar regions of the brain, and also people with a bleed on CAT scan who cannot get MRI. (
  • BA length, diameter and volume, and cerebral lesions were analysed by MRI/TOF-MR angiography or CT/CT angiography in 20 LOPD patients and 40 controls matching in age, sex- and cardiovascular risk factors. (
  • Finally the occurrence of cerebral lesions was examined. (
  • Though most commonly involving white matter, many patients also had lesions in deep grey matter structures, as well as leptomeningeal enhancement. (
  • The development of helical CT technology offered a new imaging technique to depict the cerebral vascular circulation. (
  • It also produces some incredible images of the cerebral circulation! (
  • The tumor may extend into deeper parts of the brain. (
  • Conventional angiography of the 4 cerebral arterial axes are the reference standard for imaging brain death. (
  • Brain death implies the permanent absence of cerebral and brainstem functions. (
  • Here's how it works: You can't directly stimulate the hippocampus - a small brain structure that controls memory - because it's too deep in the brain. (
  • Brain MRI demonstrated diffusely abnormal areas of increased T 2 signal intensity involving the deep white matter of both cerebral hemispheres and the cerebellum (Fig. 1) . (
  • Radiology of the skull and brain angiography, vol. 2, Book 3. (
  • Over the past 20 or so years, the concept of 'neurological death' commonly called 'brain death,' 'whole brain death' or 'brain-stem death' (and, sometimes, inaccurately-termed 'cerebral death') has gained increasing acceptance within the medical profession and among the vast majority of state legislatures and courts in the United States. (
  • Cerebral angiography is a procedure that uses a special dye (contrast material) and x-rays to see how blood flows through the brain. (
  • Oxygen is delivered to brain tissue by a dense network of microvessels, which actively control cerebral blood flow (CBF) through vasodilation and contraction in response to changing levels of neural activity. (
  • A cranial CT scan revealed increasingly diffuse brain swelling and multifocal hemorrhagic infarctions in both cerebral hemispheres (Fig. 3). (
  • Spinal angiography is more specialized than even brain angiography. (
  • Many places which are comfortable with brain angiography may not be as versed in spinal procedures, depending on disease 1) . (
  • In Parkinson's disease, the neurons in the basal ganglia (clusters of paired nerve cells deep inside the brain) that control muscular activity become dam- aged or die. (
  • One hundred fifty diagnostic cerebral angiographies were randomized into 50 procedures, each using conventional angiographic technique, or systemic heparin treatment throughout the procedure, or air filters between the catheter and both the contrast medium syringe and the catheter flushing. (
  • This revised and enlarged edition of Cerebral Angiography, which includes new angiographic studies and illustrative drawings, offers detailed guidance on diagnostic use of the procedure. (
  • Which means that spinal angiography can be a long procedure, if the entire spine vasculature needs to be visualized. (
  • Background- Intra-arterial cerebral angiography is associated with a low risk for neurological complications, but clinically silent ischemic events after angiography have been seen in a substantial number of patients. (
  • Conclusions- Air filters and heparin both reduce the incidence of silent ischemic events detected by DW-MRI after intra-arterial cerebral angiography and can potentially lower clinically overt ischemic complications. (
  • The cerebral venous drainage pattern must be carefully studied by contralateral carotid and vertebral artery injections to correctly evaluate the impairment of the cerebral venous outflow. (
  • Bow Hunter's syndrome: surgical vertebral artery decompression guided by dynamic intraoperative angiography. (
  • Recently, a 56 year-old man, who had previously been diagnosed with vertebral artery stenosis by cerebral angiography, suffered vertigo with nystagmus immediately after making a deep-sea dive. (
  • see Spinal Angiography for vertebral hemangioma . (
  • Cerebral angiography demonstrated no apparent organic lesion of the right vertebral artery (VA), but showed hypoplasia of the left VA. (
  • Fluorescein angiography was not performed given the deterioration of the renal function warranting hemodialysis. (
  • To determine the distribution of leakage on fluorescein angiography (FA) and explore the clinically protective role of astrocytes against damage to the inner blood retinal barrier (iBRB) in diabetic macular edema (DME). (
  • Fluorescein angiography may demonstrate leakage in areas remote from the retinal infarctions. (
  • Most commonly used to detect and evaluate heart conditions, the speed of the 64 slice CT serves as an alternative to conventional angiography or cardiac catheterization. (
  • 7,8 Moreover, silent cerebral embolism has also been shown in extracranial angiographic procedures. (
  • Twelve of these patients have been included in a recent publication 4 concerning clinical and angiographic correlation in 205 patients with cerebral DAVFs. (
  • A total number of 1204 patients with cerebral AVM were treated with Gamma Knife between 1989 and 2009 at the University of Virginia. (
  • Intraoperative Fluorescence Cerebral Angiography by Laser Surgical Microscopy: Comparison With Xenon Microscopy and Simultaneous Observation of Cerebral Blood Flow and Surrounding Structures. (
  • Investigators conduct a monocentric pilot study with the objective to determine the hemodynamic parameter of fluorescence angiography (slope, amplitude, saturation time ) best correlated w. (
  • Cerebral angiography provides precise anatomical imaging of the cerebral vasculature and its variations, with accurate identification of vascular territories and their specific function. (
  • Metallic filters placed in the inferior vena cava to prevent propagation of deep venous thrombus, both temporary and permanent. (
  • More recently, the introduction of multidetector-row CT has opened new frontiers for CT angiography offering higher spatial and temporal resolution. (
  • The classic head CT findings for moyamoya disease in a pediatric patient are hypodensities in watershed areas, basal ganglia, deep white matter, and periventricular regions, suggesting prior infarcts. (
  • MR angiography (MRA) is used to assess the degree of vessel stenosis and collateral formation. (
  • In this article, we review state-of-the-art optical microscopy technologies for quantitative in vivo imaging of cerebral microvascular structure, blood flow and oxygenation, and theoretical methods that utilize such data to generate spatially resolved models for blood flow and oxygen transport. (
  • Cerebral angiography was pioneered by the Portuguese neurologist Egas Moniz in 1927 and has since continued to evolve to be the essential imaging for cerebrovascular pathology, frequently yielding more telling diagnostic images than conventional MRI or CT scans. (
  • 16. Absence of cortical functions  No spontaneous movement, eye opening, or movement or response after auditory, verbal, or visual commands  Cerebral motor response to pain  Supraorbital ridge, the nail beds, trapezius  Motor responses may occur spontaneously during apnea testing (spinal reflexes)  Spinal arcs are intact! (
  • Szika has demonstrated the possibility of defining indirectly the topograpfy of cortical sulci by means of Tele-Stereotactic-Stereoscopic Angiography. (
  • We therefore aimed to investigate the diagnostic value of multidetector-row CT angiography (MDCTA) in diagnosing CVST and compared it with MR venography as the reference standard that most closely reflects current practice. (
  • CT venography proved to be a reliable method to depict the cerebral venous structures. (
  • Cerebral rheumatoid vasculitis is an uncommon and serious complication of RA. (
  • Cerebral rheumatoid vasculitis is an uncommon and serious complication which can be life-threatening. (
  • Cerebral vasculitis is an infrequent complication in rheumatoid arthritis which is associated with high morbidity and in some cases can be life-threatening. (
  • There was no neurological complication during or after angiography. (
  • Cerebral malaria is a severe complication of falciparum malaria that occurs infrequently in adults. (
  • CT and CT angiography in a patient with a load left neck bruit and symptoms of a transient ischemic attack. (
  • Both patients underwent fluorescein retinal angiography that demonstrated multifocal retinal artery occlusions without evidence of embolic disease. (