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A hyperintensity or T2 hyperintensity is an area of high intensity on types of magnetic resonance imaging (MRI) scans of the brain of a human or of another mammal that reflect lesions produced largely by demyelination and axonal loss.
White matter hyperintensities can be caused by a variety of factors, including ischemia, micro-hemorrhages, gliosis, damage to small blood vessel walls, breaches of the barrier between the cerebrospinal fluid and the brain, or loss and deformation of the myelin sheath.
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.
Evidence from subcortical small infarcts suggests that motor fibers are somatotopically arranged in the human corona radiata. Following subtotal brain damage, localization of the corticofugal projection in the corona radiata and internal capsule can assist in evaluating a patient's residual motor capacity and predicting their potential for functional restitution.
Central pontine myelinolysis; Other names: Osmotic demyelination syndrome, central pontine demyelination: Axial fat-saturated T2-weighted image showing hyperintensity in the pons with sparing of the peripheral fibers, the patient was an alcoholic admitted with a serum Na of 101 treated with hypertonic saline, he was left with quadriparesis, dysarthria, and altered mental status
lower white matter hyperintensity volume, indicating less damage to the white matter in the brain. increased fractional anisotropy, indicating well-organized and healthy white matter connections.
The hotcross bun sign is a radiologic sign observed on transverse T2-weighted magnetic resonance (MR) images of the brain, describing a cross-shaped (or cruciform) hyperintensity within the pons. This sign is most commonly associated with the cerebellar subtype of multiple system atrophy (MSA-c). [1]
MRI shows hyperintensities on T2 weighted imaging, localized usually to the parietal and occipital regions. Treatment ...