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Fluid-attenuated inversion recovery (FLAIR) is a magnetic resonance imaging sequence with an inversion recovery set to null fluids. For example, it can be used in brain imaging to suppress cerebrospinal fluid (CSF) effects on the image, so as to bring out the periventricular hyperintense lesions, such as multiple sclerosis (MS) plaques. [ 1 ]
In diffusion weighted imaging (DWI), the intensity of each image element reflects the best estimate of the rate of water diffusion at that location.Because the mobility of water is driven by thermal agitation and highly dependent on its cellular environment, the hypothesis behind DWI is that findings may indicate (early) pathologic change.
Coupled with imaging of cerebral perfusion, researchers can highlight regions of "perfusion/diffusion mismatch" that may indicate regions capable of salvage by reperfusion therapy. Like many other specialized applications, this technique is usually coupled with a fast image acquisition sequence, such as echo planar imaging sequence.
Another possible explanation is that there is an increase in local venous blood volume. In either case, this image suggests that the tissue associated with this vascular territory could be tissue at risk. Future stroke research will involve comparisons of perfusion weighted imaging and SWI to learn more about local flow and oxygen saturation.
Judge allows plaintiff's false arrest case to go to trial, and also finds substantially true' his claims that one Newton officer had abused girlfriend Judge finds Newton officers lacked cause for ...
For example, deep white matter hyperintensities are 2.5 to 3 times more likely to occur in bipolar disorder and major depressive disorder than control subjects. [ 3 ] [ 4 ] WMH volume, calculated as a potential diagnostic measure, has been shown to correlate to certain cognitive factors. [ 5 ]
Many major trials of the drug ivermectin that claimed it could prevent COVID-19 were found to show signs of fraud and had "either obvious signs of fabrication or errors so critical they invalidate the study," according to one of the groups investigating the studies. [77] For example, some studies were found to list patients who had never ...
Court records show the drunken driving case against Barron was filed in an unorthodox way, via a one-page DWI citation with the word "summons" at the bottom. It showed he refused to take a breath ...