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Several models have been proposed to describe this curvature at higher b-values, mainly the “biexponential” model which assumes the presence of 2 water compartments with fast and slow diffusion [5] [6] (where neither compartment is the from IVIM), the relative 'fast' and 'slow' labels referring to restricted and hindered diffusion, rather ...
Diffusion tensor imaging (DTI) is a magnetic resonance imaging technique that enables the measurement of the restricted diffusion of water in tissue in order to produce neural tract images instead of using this data solely for the purpose of assigning contrast or colors to pixels in a cross-sectional image.
Idiopathic, stroke, dementia Gerstmann syndrome is a neurological disorder that is characterized by a constellation of symptoms [ 1 ] that suggests the presence of a lesion usually near the junction of the temporal and parietal lobes at or near the angular gyrus .
Cerebral infarction, also known as an ischemic stroke, is the pathologic process that results in an area of necrotic tissue in the brain (cerebral infarct). [1] In mid to high income countries, a stroke is the main reason for disability among people and the 2nd cause of death. [2]
Silent stroke is a stroke which does not have any outward symptoms, and the patient is typically unaware they have had a stroke. Despite its lack of identifiable symptoms, a silent stroke still causes brain damage and places the patient at increased risk for a major stroke in the future. In a broad study in 1998, more than 11 million people ...
Stroke without an obvious explanation is termed cryptogenic stroke ; this constitutes 30–40% of all cases of ischemic stroke. [ 2 ] [ 25 ] There are classification systems for acute ischemic stroke.
Middle cerebral artery syndrome is a condition whereby the blood supply from the middle cerebral artery (MCA) is restricted, leading to a reduction of the function of the portions of the brain supplied by that vessel: the lateral aspects of frontal, temporal and parietal lobes, the corona radiata, globus pallidus, caudate and putamen.
Brain ischemia has been linked to a variety of diseases or abnormalities. Individuals with sickle cell anemia, compressed blood vessels, ventricular tachycardia, plaque buildup in the arteries, blood clots, extremely low blood pressure as a result of heart attack, and congenital heart defects have a higher predisposition to brain ischemia in comparison to the average population.