Cerebral Angiography: Radiography of the vascular system of the brain after injection of a contrast medium.Angiography: Radiography of blood vessels after injection of a contrast medium.Magnetic Resonance Angiography: 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.Angiography, Digital Subtraction: 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.Coronary Angiography: Radiography of the vascular system of the heart muscle after injection of a contrast medium.Cerebral Arteries: The arterial blood vessels supplying the CEREBRUM.Intracranial Aneurysm: 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)Cerebral Infarction: 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).Subarachnoid Hemorrhage: 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.Intracranial Arteriovenous Malformations: 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.Tomography, X-Ray Computed: Tomography using x-ray transmission and a computer algorithm to reconstruct the image.Cerebrovascular Circulation: The circulation of blood through the BLOOD VESSELS of the BRAIN.Cerebral Veins: Veins draining the cerebrum.Cranial Sinuses: 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).Vertebral Artery: The first branch of the SUBCLAVIAN ARTERY with distribution to muscles of the NECK; VERTEBRAE; SPINAL CORD; CEREBELLUM; and interior of the CEREBRUM.Moyamoya Disease: 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.Carotid Artery, Internal: Branch of the common carotid artery which supplies the anterior part of the brain, the eye and its appendages, the forehead and nose.Cerebral Hemorrhage: Bleeding into one or both CEREBRAL HEMISPHERES including the BASAL GANGLIA and the CEREBRAL CORTEX. It is often associated with HYPERTENSION and CRANIOCEREBRAL TRAUMA.Posterior Cerebral Artery: 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.Ischemic Attack, Transient: 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)Circle of Willis: 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.Central Nervous System Vascular Malformations: Congenital, inherited, or acquired abnormalities involving ARTERIES; VEINS; or venous sinuses in the BRAIN; SPINAL CORD; and MENINGES.Cerebrovascular Disorders: 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.Middle Cerebral Artery: The largest of the cerebral arteries. It trifurcates into temporal, frontal, and parietal branches supplying blood to most of the parenchyma of these lobes in the CEREBRAL CORTEX. These are the areas involved in motor, sensory, and speech activities.Aneurysm, Ruptured: 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.Brain Ischemia: 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.Fluorescein Angiography: 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.Intracranial Embolism and Thrombosis: 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.Cerebral Revascularization: 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.Magnetic Resonance Imaging: 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.Vasospasm, Intracranial: 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).Basilar Artery: 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.Embolization, Therapeutic: 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.Arterial Occlusive Diseases: 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.Cerebral Arterial Diseases: 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.Anterior Cerebral Artery: 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.Cerebral Palsy: 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)Vasculitis, Central Nervous System: 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)Carotid Artery Diseases: 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.Brain: 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.Contrast Media: Substances used to allow enhanced visualization of tissues.Carotid Stenosis: 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)Vertebrobasilar Insufficiency: 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.Sinus Thrombosis, Intracranial: 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.Intracranial Arteriosclerosis: 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.Blindness, Cortical: 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)Craniotomy: Any operation on the cranium or incision into the cranium. (Dorland, 28th ed)Arteriovenous Fistula: 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.Epilepsy, Tonic-Clonic: 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)Endarterectomy: Surgical excision, performed under general anesthesia, of the atheromatous tunica intima of an artery. When reconstruction of an artery is performed as an endovascular procedure through a catheter, it is called ATHERECTOMY.Collateral Circulation: Maintenance of blood flow to an organ despite obstruction of a principal vessel. Blood flow is maintained through small vessels.Arteriovenous Malformations: 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.Blood Flow Velocity: A value equal to the total volume flow divided by the cross-sectional area of the vascular bed.Carotid Arteries: 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.Intracranial Embolism: 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.Neurologic Examination: Assessment of sensory and motor responses and reflexes that is used to determine impairment of the nervous system.Neurosurgical Procedures: Surgery performed on the nervous system or its parts.Hematoma, Subdural: 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.Cranial Fossa, Anterior: The compartment containing the inferior part and anterior extremities of the frontal lobes (FRONTAL LOBE) of the cerebral hemispheres. It is formed mainly by orbital parts of the FRONTAL BONE and the lesser wings of the SPHENOID BONE.Infarction, Middle Cerebral Artery: 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.Constriction, Pathologic: The condition of an anatomical structure's being constricted beyond normal dimensions.Sensitivity and Specificity: 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)Carotid-Cavernous Sinus Fistula: 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.Prospective Studies: 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.Cavernous Sinus: An irregularly shaped venous space in the dura mater at either side of the sphenoid bone.Vertebral Artery Dissection: 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.Treatment Outcome: 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.Malaria, Cerebral: 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)Surgical Instruments: Hand-held tools or implements used by health professionals for the performance of surgical tasks.Temporal Arteries: Arteries arising from the external carotid or the maxillary artery and distributing to the temporal region.Hematoma, Subdural, Intracranial: Accumulation of blood in the SUBDURAL SPACE over the CEREBRAL HEMISPHERE.Coma: A profound state of unconsciousness associated with depressed cerebral activity from which the individual cannot be aroused. Coma generally occurs when there is dysfunction or injury involving both cerebral hemispheres or the brain stem RETICULAR FORMATION.Lateral Medullary Syndrome: 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)Headache: The symptom of PAIN in the cranial region. It may be an isolated benign occurrence or manifestation of a wide variety of HEADACHE DISORDERS.Follow-Up Studies: 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.Retrospective Studies: 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.Radionuclide Angiography: 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.Intracranial Hemorrhages: 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.Aneurysm, Infected: Aneurysm due to growth of microorganisms in the arterial wall, or infection arising within preexisting arteriosclerotic aneurysms.Hematoma: A collection of blood outside the BLOOD VESSELS. Hematoma can be localized in an organ, space, or tissue.Time Factors: Elements of limited time intervals, contributing to particular results or situations.Remission, Spontaneous: A spontaneous diminution or abatement of a disease over time, without formal treatment.Catheterization: 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.Rupture, Spontaneous: Tear or break of an organ, vessel or other soft part of the body, occurring in the absence of external force.Ultrasonography, Doppler, Transcranial: 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.Carotid Artery Thrombosis: 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.Dura Mater: The outermost of the three MENINGES, a fibrous membrane of connective tissue that covers the brain and the spinal cord.Radial Artery: 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.Imaging, Three-Dimensional: 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.Ultrasonography: 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.Stroke: 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)Coronary Artery Disease: Pathological processes of CORONARY ARTERIES that may derive from a congenital abnormality, atherosclerotic, or non-atherosclerotic cause.Pneumonia, Aspiration: A type of lung inflammation resulting from the aspiration of food, liquid, or gastric contents into the upper RESPIRATORY TRACT.Endarterectomy, Carotid: The excision of the thickened, atheromatous tunica intima of a carotid artery.Aneurysm, Dissecting: 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.Coronary Stenosis: Narrowing or constriction of a coronary artery.Tomography, Spiral Computed: 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.Risk Factors: 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.Recurrence: The return of a sign, symptom, or disease after a remission.Predictive Value of Tests: 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.Image Processing, Computer-Assisted: 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.Iopamidol: A non-ionic, water-soluble contrast agent which is used in myelography, arthrography, nephroangiography, arteriography, and other radiological procedures.Reproducibility of Results: 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.Multidetector Computed Tomography: Types of spiral computed tomography technology in which multiple slices of data are acquired simultaneously improving the resolution over single slice acquisition technology.Stents: Devices that provide support for tubular structures that are being anastomosed or for body cavities during skin grafting.Postoperative Complications: 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.Coronary Vessels: The veins and arteries of the HEART.Iohexol: 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.Radiographic Image Interpretation, Computer-Assisted: Computer systems or networks designed to provide radiographic interpretive information.Coronary Disease: 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.Tomography, Emission-Computed, Single-Photon: 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.Brain Neoplasms: 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.Indocyanine Green: A tricarbocyanine dye that is used diagnostically in liver function tests and to determine blood volume and cardiac output.Observer Variation: 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).Brain Edema: 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)Cerebral Amyloid Angiopathy: 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)Cerebral Ventricles: 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).Severity of Illness Index: Levels within a diagnostic group which are established by various measurement criteria applied to the seriousness of a patient's disorder.Radiographic Image Enhancement: 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.Brain Diseases: 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.Ultrasonography, Interventional: 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.Regional Blood Flow: The flow of BLOOD through or around an organ or region of the body.Feasibility Studies: Studies to determine the advantages or disadvantages, practicability, or capability of accomplishing a projected plan, study, or project.Intracranial Thrombosis: 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.Image Enhancement: 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, Cerebral: Dominance of one cerebral hemisphere over the other in cerebral functions.Angioplasty, Balloon, Coronary: Dilation of an occluded coronary artery (or arteries) by means of a balloon catheter to restore myocardial blood supply.Myocardial Infarction: NECROSIS of the MYOCARDIUM caused by an obstruction of the blood supply to the heart (CORONARY CIRCULATION).Intracranial Pressure: Pressure within the cranial cavity. It is influenced by brain mass, the circulatory system, CSF dynamics, and skull rigidity.Electrocardiography: 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.Fundus Oculi: 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)Gadolinium DTPA: 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)Disease Models, Animal: 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.Injections, Intra-Arterial: Delivery of drugs into an artery.Incidence: 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.Ultrasonography, Doppler, Duplex: 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.Radiation Dosage: 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).Aortography: Radiographic visualization of the aorta and its branches by injection of contrast media, using percutaneous puncture or catheterization procedures.Radiography, Interventional: 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.Triiodobenzoic Acids: Triiodo-substituted derivatives of BENZOIC ACID.Vascular Patency: The degree to which BLOOD VESSELS are not blocked or obstructed.Cardiac Catheterization: Procedures in which placement of CARDIAC CATHETERS is performed for therapeutic or diagnostic procedures.Acute Disease: Disease having a short and relatively severe course.Angina Pectoris: 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.Xenon Radioisotopes: 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.Cerebrum: 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.Tomography, Emission-Computed: Tomography using radioactive emissions from injected RADIONUCLIDES and computer ALGORITHMS to reconstruct an image.Blood Pressure: PRESSURE of the BLOOD on the ARTERIES and other BLOOD VESSELS.Brain Infarction: 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.Hemodynamics: The movement and the forces involved in the movement of the blood through the CARDIOVASCULAR SYSTEM.Extravasation of Diagnostic and Therapeutic Materials: The escape of diagnostic or therapeutic material from the vessel into which it is introduced into the surrounding tissue or body cavity.Chest Pain: Pressure, burning, or numbness in the chest.Aneurysm: Pathological outpouching or sac-like dilatation in the wall of any blood vessel (ARTERIES or VEINS) or the heart (HEART ANEURYSM). It indicates a thin and weakened area in the wall which may later rupture. Aneurysms are classified by location, etiology, or other characteristics.Ultrasonography, Doppler: 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)Artifacts: 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.Reperfusion: 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.Pia Mater: 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.Cineangiography: Motion pictures of the passage of contrast medium through blood vessels.Coronary Circulation: The circulation of blood through the CORONARY VESSELS of the HEART.Image Interpretation, Computer-Assisted: Methods developed to aid in the interpretation of ultrasound, radiographic images, etc., for diagnosis of disease.Myocardial Perfusion Imaging: 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.Ultrasonography, Doppler, Color: 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.Hypoxia, Brain: 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.Carbon Dioxide: A colorless, odorless gas that can be formed by the body and is necessary for the respiration cycle of plants and animals.Arteries: The vessels carrying blood away from the heart.Angiocardiography: Radiography of the heart and great vessels after injection of a contrast medium.Oxygen: 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.Spectroscopy, Near-Infrared: 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.Neuroprotective Agents: 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.Renal Artery: A branch of the abdominal aorta which supplies the kidneys, adrenal glands and ureters.Pulmonary Embolism: Blocking of the PULMONARY ARTERY or one of its branches by an EMBOLUS.Fractional Flow Reserve, Myocardial: 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.Myocardial Revascularization: The restoration of blood supply to the myocardium. (From Dorland, 28th ed)Blood Volume: Volume of circulating BLOOD. It is the sum of the PLASMA VOLUME and ERYTHROCYTE VOLUME.Carotid Artery, External: Branch of the common carotid artery which supplies the exterior of the head, the face, and the greater part of the neck.Rats, Sprague-Dawley: 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.Celiac Artery: The arterial trunk that arises from the abdominal aorta and after a short course divides into the left gastric, common hepatic and splenic arteries.Cardiac-Gated Imaging Techniques: Timing the acquisition of imaging data to specific points in the cardiac cycle to minimize image blurring and other motion artifacts.Coronary Vessel Anomalies: Malformations of CORONARY VESSELS, either arteries or veins. Included are anomalous origins of coronary arteries; ARTERIOVENOUS FISTULA; CORONARY ANEURYSM; MYOCARDIAL BRIDGING; and others.Coronary Artery Bypass: 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.Angioplasty, Balloon: 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.Gadolinium: 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.Aneurysm, False: 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.Thrombolytic Therapy: Use of infusions of FIBRINOLYTIC AGENTS to destroy or dissolve thrombi in blood vessels or bypass grafts.Microcirculation: The circulation of the BLOOD through the MICROVASCULAR NETWORK.Perfusion Imaging: The creation and display of functional images showing where the blood flow reaches by following the distribution of tracers injected into the blood stream.Prognosis: 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.Blood-Brain Barrier: 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.Subtraction Technique: 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).Calcinosis: Pathologic deposition of calcium salts in tissues.Preoperative Care: 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)Graft Occlusion, Vascular: Obstruction of flow in biological or prosthetic vascular grafts.Acetazolamide: 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)Technetium: 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.Coronary Aneurysm: Abnormal balloon- or sac-like dilatation in the wall of CORONARY VESSELS. Most coronary aneurysms are due to CORONARY ATHEROSCLEROSIS, and the rest are due to inflammatory diseases, such as KAWASAKI DISEASE.Technetium Tc 99m Exametazime: A gamma-emitting RADIONUCLIDE IMAGING agent used in the evaluation of regional cerebral blood flow and in non-invasive dynamic biodistribution studies and MYOCARDIAL PERFUSION IMAGING. It has also been used to label leukocytes in the investigation of INFLAMMATORY BOWEL DISEASES.Organotechnetium Compounds: Organic compounds that contain technetium as an integral part of the molecule. These compounds are often used as radionuclide imaging agents.Vasodilator Agents: Drugs used to cause dilation of the blood vessels.Exercise Test: Controlled physical activity which is performed in order to allow assessment of physiological functions, particularly cardiovascular and pulmonary, but also aerobic capacity. Maximal (most intense) exercise is usually required but submaximal exercise is also used.Femoral Artery: The main artery of the thigh, a continuation of the external iliac artery.Phlebography: Radiographic visualization or recording of a vein after the injection of contrast medium.
Internal carotid artery
386-393  Osborn, Anne (1999). Diagnostic Cerebral Angiography (2nd ed.). Philadelphia, PA, USA: Lippincott Williams & ... The internal carotid artery can receive blood flow via an important collateral pathway supplying the brain, the cerebral ... artery the anterior choroidal artery The internal carotid then divides to form the anterior cerebral artery and middle cerebral ... Middle cerebral artery (a terminal branch) The sympathetic trunk forms a plexus of nerves around the artery known as the ...
Dural arteriovenous fistula
1927 in science
António Egas Moniz
Clinical cerebral angiography), Turin, 1938. Die cerebrale Arteriographie und Phlebographie (Cerebral arteriography and ... L'angiographie cérébrale, ses applications et résultats en anatomic, physiologie et clinique (Cerebral angiography, its ... was a Portuguese neurologist and the developer of cerebral angiography. He is regarded as one of the founders of modern ... His work led to the use of angiography to detect internal carotid occlusion, as well as two Nobel Prize nominations in this ...
Cerebral angiography examinations may expose AVMs in the cerebrum. MRIs are also used in imaging the brain and can allow ... MRI, CT, and cerebral angiography are all useful for investigating the extent and location of any vascular lesions that are ... Fluorescein angiography is commonly used to diagnose the syndrome. There have been several methods in treating patients who ... Fluorescein angiography is quite useful in diagnosing the disease, and the use of ultrasonography and optical coherence ...
Vertebral artery dissection
The gold standard is cerebral angiography (with or without digital subtraction angiography). This involves puncture of a large ... MR angiography). They use smaller amounts of contrast and are not invasive. CT angiography and MR angiography are more or less ... Kaufmann TJ, Kallmes DF (June 2008). "Diagnostic cerebral angiography: archaic and complication-prone or here to stay for ... The thrombolytic drug is administered either intravenously or during cerebral angiography through a catheter directly into the ...
Cavernous sinus thrombosis
Patients have CNS symptoms as well as cerebral vasculitis by angiography and leptomeningeal biopsy. There are several ... 1.5 cm) Isolated cerebral vasculitis. Affects medium and small arteries over a diffuse CNS area, without symptomatic ... However, in Takayasu's arteritis, where the aorta may be involved, it is unlikely a biopsy will be successful and angiography ...
Dense artery sign
Through cerebral angiography, the sign has been demonstrated to correspond to embolic or atherosclerotic occlusion of an artery ... The sign has been observed in the middle cerebral artery (MCA), posterior cerebral artery (PCA), vertebral artery, and basilar ... Launes J, Ketonen L (November 1987). "Dense middle cerebral artery sign: an indicator of poor outcome in middle cerebral artery ... 1993). "Increased density in the middle cerebral artery by nonenhanced computed tomography. Prognostic value in acute cerebral ...
If a cerebral aneurysm is identified on angiography, two measures are available to reduce the risk of further bleeding from the ... 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 ... the choice is between cerebral angiography (injecting radiocontrast through a catheter to the brain arteries) and CT ...
Science and technology in Portugal
In 1927 Egas Moniz introduced cerebral angiography, whereby both normal and abnormal blood vessels in and around the brain ... 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 ... Dandy also observed that air introduced into the subarachnoid space via lumbar spinal puncture could enter the cerebral ...
Death in Singapore
Cerebral angiography showed a right moyamoya pattern and an ipsilateral dural AVF fed by branches of the external carotid ... These vessels are the ACA (anterior cerebral artery), MCA (middle cerebral artery), and ICA (internal carotid artery). The ... On angiography, a "puff of smoke" appearance is seen, and the treatment of choice is surgical bypass. About 10% of cases of ... The artery is then sutured to a branch of the middle cerebral artery on the surface of the brain and the bone is replaced. In ...
William H. Oldendorf
X-ray shadow radiography and cerebral angiography. The first line was influential in the evolving concept of neuroimaging; the ... and research on cerebral metabolism." In 1981 he received the President's Award for Distinguished Federal Civilian Service and ... and in characterizing clinically important diseases such as cerebral ischemia, starvation, and epilepsy. Oldendorf's ...
It is not usually necessary to proceed to cerebral angiography, a more precise but invasive investigation of the brain's blood ... Cerebral venous sinus thrombosis, thrombosis of the veins of the brain, usually causes a headache that reflects raised ... Day JW, Raskin NH (November 1986). "Thunderclap headache: symptom of unruptured cerebral aneurysm". Lancet. 2 (8518): 1247-8. ... The most important causes are subarachnoid hemorrhage, cerebral venous sinus thrombosis, and cervical artery dissection[ ...
... or post-stent balloon dilation and cerebral angiography. Carotid stenting is the preferred therapy for patients who are at an ... A number of other steps may or may not be performed, including the use of a cerebral protection device, pre- ... Society for Cardiovascular Angiography and Interventions, Society of Interventional Radiology, Society of NeuroInterventional ...
Beating heart cadaver
History of invasive and interventional cardiology
... angiography itself was first developed in 1927 by the Portuguese physician Egas Moniz at the University of Lisbon for cerebral ... Catheters in these shapes carry his name and are still used to this day for selective coronary angiography. The use of tapered ... Donald S. Baim; William Grossman (2000). Grossman's Cardiac Catheterization, Angiography, and Intervention. Philadelphia, PA: ... Society For Cardiovascular Angiography And Interventions. Archived from the original on 2007-02-07. Retrieved 2007-04-08. ...
Central Institute of Psychiatry
Posterior communicating artery
Osborn, Anne G.; Jacobs, John M. (1999), Diagnostic Cerebral Angiography, Lippincott Williams & Wilkins, pp. 153 Media related ... prior to the terminal bifurcation of the ICA into the anterior cerebral artery and middle cerebral artery. Posteriorly, it ... The development of the posterior cerebral artery (PCA) in the fetal brain occurs relatively late and arises from the fusion of ... The brain is supplied with blood by the internal carotid arteries and also by the posterior cerebral arteries; the posterior ...
History of neuroimaging
As a result, cerebral angiography remains an essential part of the neurosurgeon's diagnostic imaging armamentarium and, ... introduced cerebral angiography, whereby both normal and abnormal blood vessels in and around the brain could be visualized ... Dandy also observed that air introduced into the subarachnoid space via lumbar spinal puncture could enter the cerebral ... increasingly, of the therapeutic armamentarium as well, in the neurointerventional management of cerebral aneurysms and other ...
Posterior meningeal artery
... angiography itself was first developed in 1927 by the Portuguese physician Egas Moniz at the University of Lisbon for cerebral ... The first radial access for angiography can be traced back to 1953, where Eduardo Pereira, in Lisbon, Portugal, first ... angiography, the viewing of brain vasculature by X-ray radiation with the aid of a contrast medium introduced by catheter. ...
Angiography. Angiogram showing a transverse projection of the vertebro basilar and posterior cerebral circulation. ... Main article: Angiography. Angiography is the use of fluoroscopy to view the cardiovascular system. An iodine-based contrast is ... Angiography is used to find aneurysms, leaks, blockages (thromboses), new vessel growth, and placement of catheters and stents ... It is also used in CT pulmonary angiography to decrease the required dose of iodinated contrast. ...
Early imaging methods - invasive and sometimes dangerous - such as pneumoencephalography and cerebral angiography have been ... Brain metastasis in the right cerebral hemisphere from lung cancer, shown on magnetic resonance imaging. ... although glial cells outnumber neurons roughly 4 to 1 in the cerebral cortex. Glia come in several types, which perform a ...
Strok bahasa Indonesia, ensiklopedia bebas
... cerebral angiography. Sistem TOAST membagi stroke menjadi 5 subtipe yaitu, large artery atherosclerosis (LAAS), ... impaired cerebral autoregulation dan perubahan protrombotik dipercaya merupakan penyebab cerebral small vessel disease (SVD). ... Cryptogenic cerebral infarction (CCI)[sunting , sunting sumber]. CCI paling banyak ditemukan dalam penderita patent foramen ... "Cryptogenic cerebral infarction: from classification to concept". SourceCHU de la Cavale Blanche, Service de neurologie; Timsit ...
In 1927 Egas Moniz introduced cerebral angiography, whereby both normal and abnormal blood vessels in and around the brain ... 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 ... Dandy also observed that air introduced into the subarachnoid space via lumbar spinal puncture could enter the cerebral ...
Cerebral bypass surgery. 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): ...
... causes an increased risk of cerebral microbleeds having the appearance on MRI scans of 5 to 10 mm or smaller, ... Foundation/American Heart Association Task Force on Practice Guidelines and the Society for Cardiovascular Angiography and ... Gorelick PB (June 2009). "Cerebral microbleeds: evidence of heightened risk associated with aspirin use". Archives of Neurology ... hypointense (dark holes) patches. Such cerebral microbleeds are important, since they often occur prior to ischemic ...
It accounts for 20% of all cases of cerebrovascular disease in the United States, behind cerebral thrombosis (40%) and cerebral ... Both computed tomography angiography (CTA) and magnetic resonance angiography (MRA) have been proved to be effective in ... "Journal of Cerebral Blood Flow & Metabolism. 30 (4): 689-702. doi:10.1038/jcbfm.2009.282. PMC 2949160. PMID 20087366. Archived ... Cerebral bleeding affects about 2.5 per 10,000 people each year. It occurs more often in males and older people. About 44 ...
... and cerebral scintigraphy (technetium Tc 99m exametazime). Cerebral angiography is considered the most sensitive confirmatory ... For example, although one major medical dictionary considers "brain death" to be synonymous with "cerebral death" (death of ... CT angiography is neither required nor sufficient test to make the diagnosis. ... Also, a radionuclide cerebral blood flow scan that shows complete absence of intracranial blood flow must be considered with ...
Patients have CNS symptoms as well as cerebral vasculitis by angiography and leptomeningeal biopsy. ... Isolated cerebral vasculitis. Affects medium and small arteries over a diffuse CNS area, without symptomatic extracranial ... However, in Takayasu's arteritis, where the aorta may be involved, it is unlikely a biopsy will be successful and angiography ...
Lobotomija - Википедија, слободна енциклопедија
Functional magnetic resonance imaging
... low-dose coronary CT angiography, nuclear imaging, and X-ray angiography), differences in the mechanism by which this damage ... The cerebral blood flow (CBF) corresponds to the consumed glucose differently in different brain regions. Initial results show ... This technique relies on the fact that cerebral blood flow and neuronal activation are coupled. When an area of the brain is in ... Mosso's manuscripts do not provide direct evidence that the balance was really able to measure changes in cerebral blood flow ...
阿司匹林 - 維基百科，自由的百科全書
Cerebral microbleeds: evidence of heightened risk associated with aspirin use. Arch Neurol. 2009, 66 (6): 691-3. PMID 19506128 ... Foundation/American Heart Association Task Force on Practice Guidelines and the Society for Cardiovascular Angiography and ... Stroke; a journal of cerebral circulation. September 2005, 36 (9): 2034-6. PMID 16100022. doi:10.1161/01.STR.0000177887.14339. ... Use of antithrombotic drugs and the presence of cerebral microbleeds: the Rotterdam Scan Study. Arch Neurol. 2009, 66 (6): 714- ...
جراحی مغز و اعصاب - ویکیپدیا، دانشنامهٔ آزاد
Cerebral angiography. *Pneumoencephalography. *Echoencephalography/Transcranial Doppler. *Magnetic resonance imaging of the ... Techniques such as angioplasty, stenting, clot retrieval, embolization, and diagnostic angiography are endovascular procedures. ... or one of the cerebral hemispheres of the brain; those two procedures, when possible, are also very, very rarely used in ...
Positron emission tomography
ಪಲ್ಮನರಿ ಎಂಬಾಲಿಸಮ್ (ಶ್ವಾಸಕೋಶದ ಧಮನಿಬಂಧ) - ವಿಕಿಪೀಡಿಯ
Fluoroscopy and angiography are special applications of X-ray imaging, in which a fluorescent screen and image intensifier tube ... CT scanning has become the test of choice in diagnosing some urgent and emergent conditions, such as cerebral hemorrhage, ... certain types of cerebral aneurysm clips, metal fragments in the eyes and some metallic hardware due to the powerful magnetic ...
Cerebral edema. References. *^ American Psychological Association (APA): perfusion. (n.d.). Dictionary.com Unabridged (v ... Application of this process is used to develop radionuclide angiography, a method of diagnosing heart problems. ... Cerebral blood flow determination by rapid-sequence computed-tomography: theoretical analysis. Radiology 137: 679-686, December ... August 2000). "Continuous monitoring of regional cerebral blood flow: experimental and clinical validation of a novel thermal ...
In otherwise healthy people, the increased risk of bleeding is minimal, but those who have had recent surgery, cerebral ... In certain circumstances, OCT angiography has the potential for evaluating the effects of intensified antithrombotic therapy.[ ... for evaluating the effects of intensified antithrombotic therapy using retinal optical coherence tomography angiography". ...
Positron emission tomography
March 1999). "In vivo mapping of cerebral acetylcholinesterase activity in aging and Alzheimer's disease". Neurology. 52 (4): ... Radionuclide angiography. *Radioisotope renography. *Sestamibi parathyroid scintigraphy. *Radioactive iodine uptake test. *Bone ... Journal of Cerebral Blood Flow and Metabolism. 20 (3): 423-451. doi:10.1097/00004647-200003000-00001. PMID 10724107.. ...
Cerebral angiography - Wikipedia
Cerebral angiography is a form of angiography which provides images of blood vessels in and around the brain, thereby allowing ... cerebral angiography may yield better images than less invasive methods such as computed tomography angiography and magnetic ... In some jurisdictions, cerebral angiography is required to confirm brain death. Prior to the advent of modern ... In addition, cerebral angiography allows certain treatments to be performed immediately, based on its findings. If, for example ...
Cerebral Angiography | SpringerLink
The history of cerebral angiography is discussed, extending from the first human angiogram in 1927 to the present time.... ... This chapter covers the essential aspects of diagnostic cerebral angiography. ... This chapter covers the essential aspects of diagnostic cerebral angiography. The history of cerebral angiography is discussed ... Cloft HJ, Joseph GJ, Dion JE (1999) Risk of cerebral angiography in patients with subarachnoid hemorrhage, cerebral aneurysm, ...
Cerebral angiography: MedlinePlus Medical Encyclopedia
Cerebral angiography is a procedure that uses a special dye (contrast material) and x-rays to see how blood flows through the ... Cerebral angiography (cerebral angiogram) - diagnostic. In: Chernecky CC, Berger BJ, eds. Laboratory Tests and Diagnostic ... Angiography with a catheter is used less often now. This is because MRA (magnetic resonance angiography) and CT angiography ... Cerebral angiography is a procedure that uses a special dye (contrast material) and x-rays to see how blood flows through the ...
Cerebral Angiography (Angiogram)
Current and accurate information for patients about Cerebral Angiography. Learn what you might experience, how to prepare for ... Cerebral Angiography. Cerebral angiography uses a catheter, x-ray imaging guidance and an injection of contrast material to ... What is Cerebral Angiography. Angiography is a minimally invasive medical test that uses x-rays and an iodine-containing ... Cerebral angiography is also called intra-arterial digital subtraction angiography (IADSA). This phrase refers to acquiring the ...
Cerebral Angiography | Sutter Health
Cerebral angiography is a procedure that uses a special dye (contrast material) and x-rays to see how blood flows through the ... Angiography with a catheter is used less often now. This is because MRA (magnetic resonance angiography) and CT angiography ... Intra-arterial digital subtraction angiography; IADSA How the Test is Performed. Cerebral angiography is done in the hospital ... Cerebral angiography is a procedure that uses a special dye (contrast material) and x-rays to see how blood flows through the ...
Cerebral angiography | University of Maryland Medical Center
Cerebral angiography. Definition. Cerebral angiography is a procedure that uses a special dye (contrast material) and x-rays to ... Cerebral angiography is most often used to identify or confirm problems with the blood vessels in the brain. ... Angiography with a catheter is used less often now. This is because MRA (*magnetic resonance angiography ... Vertebral angiogram; Angiography - head; Carotid angiogram; Cervicocerebral catheter-based angiography; Intra-arterial digital ...
5-F catheter in cerebral angiography (Journal Article) | SciTech Connect
Front View Cerebral Angiography Monitoring Stock Video & More Clips of Aneurysm 976881780 | iStock
Black And White Cerebral Angiography Scan Stock Video - Download Video Clip Now - iStock
... on WN Network delivers the latest Videos and Editable pages for News & Events, including Entertainment, ... Cerebral angiography. Cerebral angiography is a form of angiography which provides images of blood vessels in and around the ... Cerebral angiography. Cerebral angiography is a form of angiography which provides images of blood vessels in and around the ... Based on procedure, the market is segmented into coronary angiography, peripheral angiography, cerebral angiography, vascular ...
... on WN Network delivers the latest Videos and Editable pages for News & Events, including Entertainment, ... Coronary Angiography, Pulmonary Angiography, Cerebral Angiography, Extremity Angiography, Renal Angiography ... Angiography ... Cerebral angiography. Cerebral angiography is a form of angiography which provides images of blood vessels in and around the ... Cerebral angiography. Cerebral angiography is a form of angiography which provides images of blood vessels in and around the ...
Cerebral Vessel Enhancement Using Rigid Registration in Three-Dimensional CT Angiography | SpringerLink
... and other vascular anomalies in a brain CT angiography. Our method is composed o ... we propose a robust 3D rigid registration technique for detecting cerebral aneurysms, arterial stenosis, ... Cerebral Vessel Enhancement Using Rigid Registration in Three-Dimensional CT Angiography. In: Sanfeliu A., Martínez Trinidad J. ... Napel, S., Marks, M.P., Rubin, G.D., Dake, M.D., McDonnell, C.H., Song, S.M., Enzmann, D.R., Jeffrey, R.B.: CT Angiography with ...
Cerebral Angiography | SpringerLink
This revised and enlarged edition of Cerebral Angiography, which includes new angiographic studies and illustrative drawings, ... This revised and enlarged edition of Cerebral Angiography, which includes new angiographic studies and illustrative drawings, ... While the emphasis throughout is on the diagnostic value of cerebral angiography, many examples of endovascular treatment in ... Atherosclerosis Cerebral Vessels Endovacular Treatment Occlusive Diseases Vascular Abnormalities Venous Thrombosis Authors and ...
Which specific anatomical features of posterior cerebral artery (PCA) stroke may be identified on angiography?
... Updated: Jul 30 ... In this anatomical study, 53 patients underwent computed tomography angiography, 49 underwent digital subtraction angiography, ... and Which specific anatomical features of posterior cerebral artery (PCA) stroke may be identified on angiography? What to Read ... de Monyé C, Dippel DW, Siepman TA, Dijkshoorn ML, Tanghe HL, van der Lugt A. Is a fetal origin of the posterior cerebral artery ...
Neurologic complications of cerebral angiography. | American Journal of Neuroradiology
Neurologic complications of cerebral angiography.. J E Heiserman, B L Dean, J A Hodak, R A Flom, C R Bird, B P Drayer, E K Fram ... Neurologic complications of cerebral angiography.. J E Heiserman, B L Dean, J A Hodak, R A Flom, C R Bird, B P Drayer, E K Fram ... Neurologic complications of cerebral angiography.. J E Heiserman, B L Dean, J A Hodak, R A Flom, C R Bird, B P Drayer and E K ... Neurologic complications of cerebral angiography. Message Subject (Your Name) has sent you a message from American Journal of ...
Cerebral Angiography - Stock Image C003/4771 - Science Photo Library
Color enhanced medicine radiology angiography showing normal blood vessels in the brain. (Enhancement of GA3404) - Stock Image ... Keywords: angiography, arteriography, blood vessel, brain, brain angiography, cardiovascular, cardiovascular system, cerebral, ... Caption: Color enhanced medicine radiology angiography showing normal blood vessels in the brain. (Enhancement of GA3404) ... cerebral angiograph, circulatory system, medical, medical imaging, nervous system, x ray, x-ray, xray ...
Cerebral angiography | The Journal of the American Osteopathic Association
Cerebral angiography You will receive an email whenever this article is corrected, updated, or cited in the literature. You can ... Cerebral angiography. The Journal of the American Osteopathic Association, March 1957, Vol. 56, 410-412. doi:https://doi.org/ ... RUBERG R. Cerebral angiography. J Am Osteopath Assoc 1957;56(7):410-412. doi: https://doi.org/. ...
Intravenous Flat-Detector Computed Tomography Angiography for Symptomatic Cerebral Vasospasm following Aneurysmal Subarachnoid...
Transradial Cerebral Angiography: Technique and Outcomes | American Journal of Neuroradiology
Transradial Cerebral Angiography: Technique and Outcomes Message Subject (Your Name) has sent you a message from American ... Transradial Cerebral Angiography: Technique and Outcomes. Alison M. Nohara and David F. Kallmes ... Transradial approach for diagnostic selective cerebral angiography: results of a consecutive series of 166 cases. AJNR Am J ... The purpose of this report was to offer detailed procedural methods for transradial cerebral angiography to facilitate adoption ...
What is the role of catheter cerebral angiography in the evaluation of posterior cerebral artery (PCA) stroke?
Catheter cerebral angiography remains the criterion standard for evaluation of vascular anatomy. However, it is a more invasive ... Drugs & Diseases , Neurology , Posterior Cerebral Artery Stroke Q&A What is the role of catheter cerebral angiography in the ... Catheter cerebral angiography remains the criterion standard for evaluation of vascular anatomy. However, it is a more invasive ... de Monyé C, Dippel DW, Siepman TA, Dijkshoorn ML, Tanghe HL, van der Lugt A. Is a fetal origin of the posterior cerebral artery ...
A. Sharath Reddy at MaxCure Hospitals Hyderabad India, Angiogram: What I wish Id known before the procedure, Cerebral ... Diagnostic Cerebral Angiography, Live Angiography (CAG) by Dr. ... Cerebral angiography. Cerebral angiography is a form of ... Cerebral angiography. Cerebral angiography is a form of angiography which provides images of blood vessels in and around the ... Cerebral Angiography Procedure. Cerebral Angiography Procedure. Digital subtraction angiography (DSA) is a fluoroscopy ...
Digital Intravenous Cerebral Angiography | (1981) | Seeger | Publications | Spie
Cerebral angiography in children | The Journal of the American Osteopathic Association
Cerebral angiography in children. The Journal of the American Osteopathic Association, December 1972, Vol. 72, 390. doi:https ... Cerebral angiography in children You will receive an email whenever this article is corrected, updated, or cited in the ... Cerebral angiography in children. J Am Osteopath Assoc 1972;72(4):390. doi: https://doi.org/. ...
Magnetic resonance imaging/magnetic resonance angiography fusion technique for intraoperative navigation during microsurgical...
... resonance angiography fusion technique for intraoperative navigation during microsurgical resection of cerebral arteriovenous ... Complete AVM obliteration was demonstrated on intraoperative angiography in all cases.. CONCLUSIONS: Precise anatomical ... and this detail may be provided by fusing MR images and MR angiography (MRA) sequences. The current study describes the use of ...
Diagnostic Cerebral Angiography
... on WN Network delivers the latest Videos and Editable pages for News & Events, including ... Cerebral angiography. Cerebral angiography is a form of angiography which provides images of blood vessels in and around the ... In addition, cerebral angiography allows certain treatments to be performed immediately, based on its findings. If, for example ... For some applications this method may yield better images than less invasive methods such as computed tomography angiography ...
Intra-Arterial Thrombolysis for Left Middle Cerebral Artery Embolic Stroke During Coronary Angiography | Circulation
Intra-Arterial Thrombolysis for Left Middle Cerebral Artery Embolic Stroke During Coronary Angiography. Patrizia Presbitero, ... The carotid angiogram, performed 2 hours after coronary angiography at the beginning of cerebral symptoms, reveals total ... The carotid angiogram, performed immediately after coronary angiography at the beginning of cerebral symptoms, reveals total ... Intra-Arterial Thrombolysis for Left Middle Cerebral Artery Embolic Stroke During Coronary Angiography ...
Heparin and Air Filters Reduce Embolic Events Caused by Intra-Arterial Cerebral Angiography | Circulation
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 ... 25 A large number of microembolic signals in the cerebral vessels has been described not only during cerebral angiography9 but ...
"Real-world" comparison of non-invasive imaging to conventional catheter angiography in the diagnosis of cerebral aneurysms. -...
"Real-world" comparison of non-invasive imaging to conventional catheter angiography in the diagnosis of cerebral aneurysms.. ... it has become increasingly difficult to justify the role of conventional angiography [digital subtraction angiography (DSA)] ... Based on numerous reports citing high sensitivity and specificity of non-invasive imaging [e.g. computed tomography angiography ... CTA) or magnetic resonance angiography (MRA)] in the detection of intracranial aneurysms, ...
Applied Cerebral Angiography - Thieme & Frohberg
This book offers detailed guidance on the diagnostic use of cerebral angiography based on precise... ... Applied Cerebral Angiography. Normal Anatomy and Vascular Pathology. Auflage. 3/E 2018. ... Beyond explaining the diagnostic value of cerebral angiography, a key aim is to equip readers with the precise knowledge of the ... This book offers detailed guidance on the diagnostic use of cerebral angiography based on precise description of the ...
Transcranial Doppler correlation with cerebral angiography in sickle cell disease. | Stroke
Transcranial Doppler correlation with cerebral angiography in sickle cell disease.. R J Adams, F T Nichols, R Figueroa, V McKie ... Transcranial Doppler correlation with cerebral angiography in sickle cell disease.. R J Adams, F T Nichols, R Figueroa, V McKie ... Transcranial Doppler correlation with cerebral angiography in sickle cell disease.. R J Adams, F T Nichols, R Figueroa, V McKie ... we compared transcranial Doppler and cerebral angiography in a primarily young, symptomatic group of 33 patients (18 males and ...
- Prominent gadolinium-enhanced cerebral lesions or meninges were linked with continued treatment at the last followup encounter (OR 2.28). (unimore.it)
- Higher disability scores at the last followup visit were associated with increasing age at the time of diagnosis (OR 1.44) and cerebral infarctions (OR 3.74), while lower disability scores were associated with gadolinium-enhanced cerebral lesions or meninges (OR 0.35) and cerebral amyloid angiopathy (OR 0.24). (unimore.it)
- Increased mortality was associated with increasing age at diagnosis (hazard ratio [HR] 1.39), diagnosis by angiography (HR 3.28), cerebral infarction (HR 4.44), and large vessel involvement (HR 4.98), while reduced mortality was associated with gadolinium-enhanced cerebral lesions or meninges (HR 0.20). (unimore.it)
- A cerebral aneurysm, also known as an intracranial aneurysm or brain aneurysm, is an abnormal bulging or ballooning of an artery in the brain that can put pressure on surrounding nerves and brain tissue. (feldmanshepherd.com)
- What Are the Symptoms of a Cerebral Aneurysm? (feldmanshepherd.com)
- What Tests Are Used to Diagnose a Cerebral Aneurysm? (feldmanshepherd.com)
- If you need help following a doctor's failure to diagnose and treat a cerebral aneurysm, you can count on the Feldman Shepherd team to help secure all of the compensation to which you are entitled, including compensation for your pain and suffering, financial losses, emotional distress, and medical expenses, while keeping you fully informed as to every step of your medical malpractice case. (feldmanshepherd.com)
- A cerebral aneurysm is an abnormal dilation of a blood vessel in the brain that harbours the risk of rupturing. (tum.de)
- To decide whether an induced blood flow alteration is sufficient for aneurysm occlusion is an essential task that the treating doctor currently fulfills by visually comparing cerebral angiography sequences taken before and after flow diverter placement. (tum.de)
- Thus far, several angiography-based methods have been proposed that try to quantify the effectiveness of a flow diverter in reducing the flow inside the aneurysm. (tum.de)
- Subarachnoid hemorrhage (SAH) represents bleeding into the subarachnoid space, most commonly from a ruptured cerebral aneurysm. (northwestern.edu)
- Cerebral angiography revealed an 8 mm anterior communicating artery aneurysm that was treated with coil embolization. (northwestern.edu)
- A cerebral (brain or intracranial) aneurysm is an area where a blood vessel in the brain weakens, resulting in a bulging or ballooning out of part of the vessel wall. (spinebrainesurgeon.com)
- Every year, an estimated 30,000 people in the United States experience a ruptured cerebral aneurysm, and up to 6 percent of the population may be living with an unruptured aneurysm. (spinebrainesurgeon.com)
- The outcome for patients treated before a ruptured aneurysm is much better than for those treated after, so the need for adequate evaluation of patients suspected of having a cerebral aneurysm is very important. (spinebrainesurgeon.com)
- A computational fluid dynamic (CFD) analysis was performed to evaluate the hemodynamic features of a very rare case of a ruptured middle cerebral artery (MCA) aneurysm with PAE. (scientificscholar.in)
- A subarachnoid hemorrhage due to an azygos anterior cerebral artery (ACA) aneurysm rupture was suspected. (scientificscholar.in)
- Hemosiderin deposits at the aneurysm wall and PAE indicates leakage from a cerebral aneurysm. (scientificscholar.in)
- Herein, we describe a very rare case of an unruptured middle cerebral artery (MCA) aneurysm with PAE that ruptured 6 days after the rupture and clipping of a concurrent anterior cerebral artery (ACA) aneurysm. (scientificscholar.in)
- CT angiography (CTA) revealed a large azygos ACA aneurysm, the suspected cause of bleeding due to the distribution of hemorrhage, and a left MCA aneurysm without any definite intraluminal thrombosis [ Figure 1b ]. (scientificscholar.in)
- Bekelis K, Missios S, Labropoulos N . Cerebral aneurysm coiling: a predictive model of hospitalization cost. (stonybrookmedicine.edu)
- Predicting inpatient complications from cerebral aneurysm clipping: the Nationwide Inpatient Sample 2005-2009. (stonybrookmedicine.edu)
- 2014. Cost-effectiveness of CT angiography and perfusion imaging for delayed cerebral ischemia and vasospasm in aneurysmal subarachnoid hemorrhage. . (cornell.edu)
- The previously healthy young woman was pronounced brain dead after cerebral angiography confirmed a severe hemorrhage stroke in her brain stem. (dreddymd.com)
Middle cerebral artery1
- Cerebral angiography demonstrated occlusion of the posterior one-third of the superior sagittal sinus but patency of the straight sinus. (elsevier.com)
- Diagnostic cerebral angiography showed dynamic right C5 vertebral occlusion and left C2 vertebral occlusion. (elsevier.com)
- Transient filament occlusion of the middle cerebral artery in rats: does the reperfusion method matter 24 hours after perfusion? (biomedcentral.com)
- Interventional Neuroradiology functions as a separate division for diagnostic and interventional cerebral and spinal angiography. (emoryhealthcare.org)
- For neurosurgeons with a preliminary year of training in diagnostic cerebral angiography, the Fellowship may be condensed to a single interventional year. (tarosa.com)
- Surgical neuroradiology of training in diagnostic cerebral angiography, the fellowship is comprised of research and clinical training the. (tarosa.com)
- Bekelis K, Missios S, Eskey C, Labropoulos N . Socioeconomic characteristics of patients undergoing ambulatory diagnostic cerebral angiography in four US States. (stonybrookmedicine.edu)
- Brain parenchymal lesions have been widely reported in association with DVAs, with abnormalities apparent on angiography, 4 CT 5 and MR structural imaging, 6 ⇓ - 8 and functional imaging methods such as perfusion and diffusion-weighted imaging. (ajnr.org)
- A multicenter study was performed based on the retrospective analysis of cerebral angiographies with systematic assessment of brain drainage pathways (including fistula drainage) in patients over 18 years of age with a single DAVF. (thejns.org)
- A MRI scan of brain is indicated with cerebral angiography. (curofy.com)
- Doctors performed a cerebral angiography through her groin all the way up to her brain. (thecovidblog.com)
- To test this hypothesis we compared both reperfusion methods in regards to cerebral blood flow (CBF) and partial oxygen pressure (pO 2 ) within the ischemic brain tissue during MCAO/reperfusion. (biomedcentral.com)
- Occlusions of intracranial vessels leading to impaired cerebral blood flow and stroke. (neuroaxismd.com)
- Lastly intravascular thrombolysis can be used to dissolve blood clots in the major cerebral vessels that are causing stroke. (neuroaxismd.com)
- AIMS AND METHODS The overall goal of the imaging the Collaterals in Acute Stroke (iCAS) study, is to identify and quantify cerebral blood flow (CBF) delivered via collateral routes using arterial spin labeling (ASL), a non-contrast MRI technique, and to determine its impact on ischemic lesion growth and patient outcome. (grantome.com)
- Group 2b patients had increased prevalence of shared use of the cerebral main drainage pathway (85.0% vs 53.2%, p = 0.002), the absence of an alternative route (45.0% vs 17.0%, p = 0.004), and the presence of contrast stagnation (62.5% vs 29.8%, p = 0.002) compared with group 2a patients. (thejns.org)
- In our prior funding cycle, we successfully showed that ASL can effectively detect collaterals and determine the cerebral blood flow (CBF) they provide in patients with Moyamoya disease, a vasculopathy of young people who develop extensive collateral networks. (grantome.com)
- Previous approaches using ICG Fluorescence Angiography show that the blood flow measurement does not match the reference and overestimates the ow. (spiedigitallibrary.org)
- The precise measurement of volume flow rely on the assumption that both the inner geometry of the blood vessel and the blood flow velocity can be precisely obtained from Fluorescence Angiography. (spiedigitallibrary.org)