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  2. Intravoxel incoherent motion - Wikipedia

    en.wikipedia.org/wiki/Intravoxel_incoherent_motion

    The late part of the curve (towards high b values, generally above 1000 s/mm²) also presents some degree of curvature (Fig.2). This is because diffusion in biological tissues is not free (Gaussian), but can be hindered by many obstacles (in particular cell membranes) or even restricted (i.e. intracellular).

  3. Diffusion-weighted magnetic resonance imaging - Wikipedia

    en.wikipedia.org/wiki/Diffusion-weighted...

    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.

  4. Cerebral infarction - Wikipedia

    en.wikipedia.org/wiki/Cerebral_infarction

    In mid to high income countries, a stroke is the main reason for disability among people and the 2nd cause of death. [2] It is caused by disrupted blood supply and restricted oxygen supply . This is most commonly due to a thrombotic occlusion, or an embolic occlusion of major vessels which leads to a cerebral infarct .

  5. Stroke - Wikipedia

    en.wikipedia.org/wiki/Stroke

    Stroke can be classified into two major categories: ischemic and hemorrhagic. [20] Ischemic stroke is caused by interruption of the blood supply to the brain, while hemorrhagic stroke results from the rupture of a blood vessel or an abnormal vascular structure. About 87% of stroke is ischemic, with the rest being hemorrhagic.

  6. Brain ischemia - Wikipedia

    en.wikipedia.org/wiki/Brain_ischemia

    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.

  7. Cerebral hypoxia - Wikipedia

    en.wikipedia.org/wiki/Cerebral_hypoxia

    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 ...

  8. Perfusion MRI - Wikipedia

    en.wikipedia.org/wiki/Perfusion_MRI

    In cerebral infarction, the penumbra has decreased perfusion. [1] Another MRI sequence, diffusion weighted MRI, estimates the amount of tissue that is already necrotic, and the combination of those sequences can therefore be used to estimate the amount of brain tissue that is salvageable by thrombolysis and/or thrombectomy.

  9. Middle cerebral artery syndrome - Wikipedia

    en.wikipedia.org/wiki/Middle_cerebral_artery...

    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.