Ad
related to: mild scattered white matter flair hyperintensities changes in lungs treatmentcancer.osu.edu has been visited by 10K+ users in the past month
Search results
Results From The WOW.Com Content Network
Head CT showing periventricular white matter lesions. Leukoaraiosis is a particular abnormal change in appearance of white matter near the lateral ventricles. It is often seen in aged individuals, but sometimes in young adults. [1] [2] On MRI, leukoaraiosis changes appear as white matter hyperintensities (WMHs) in T2 FLAIR images.
Mild Moderate Severe ARIA-E Edema: FLAIR hyperintensity confined to sulcus and/or cortex/subcortical white matter in one location < 5 cm FLAIR hyperintensity 5 to 10 cm, or more than 1 site of involvement, each measuring < 10 cm FLAIR hyperintensity measuring > 10 cm, often with significant subcortical white matter and/or sulcal involvement.
These small regions of high intensity are observed on T2 weighted MRI images (typically created using 3D FLAIR) within cerebral white matter (white matter lesions, white matter hyperintensities or WMH) [1] [2] or subcortical gray matter (gray matter hyperintensities or GMH). The volume and frequency is strongly associated with increasing age. [2]
The idea of DAI first came about as a result of studies by Sabina Strich on lesions of the white matter of individuals who had sustained head trauma years before. [37] Strich first proposed the idea in 1956, calling it diffuse degeneration of white matter; however, the more concise term "diffuse axonal injury" came to be preferred. [38]
[4] [5] If lumbar puncture is performed this may show increased protein levels but no white blood cells. [1] [3] [4] Computed tomography scanning may be performed in the first instance; this may show low density white matter areas in the posterior lobes. [4] The diagnosis is typically made with magnetic resonance imaging of the brain.
While some coincidental findings may lead to beneficial diagnoses, others may lead to overdiagnosis that results in unnecessary testing and treatment, sometimes called the "cascade effect". [1] Incidental findings are common in imaging. For instance, around 1 in every 3 cardiac MRIs result in an incidental finding. [2]
The gray matter remains normal in all characteristics while the white matter changes texture, becoming soft and gelatinous. Rarefaction of the white matter is seen through light microscopy and the small number of axons and U-fibers that were affected can also be seen. Numerous small cavities in the white matter are also apparent.
High-resolution CT image showing ground-glass opacities in the periphery of both lungs in a patient with COVID-19 (red arrows). The adjacent normal lung tissue with lower attenuation appears as darker areas. Ground-glass opacity (GGO) is a finding seen on chest x-ray (radiograph) or computed tomography (CT) imaging of the lungs.