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MRI scans showing hyperintensities. 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.
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] It was invented by Graeme Bydder, Joseph Hajnal, and Ian Young in the early 1990s. [2]
T 2 *-weighted sequences are very useful for evaluation of articular cartilages and ligaments because a relatively long T 2 * makes the articular cartilage becomes more hyperintense, while bone becomes hypointense. [2] T 2 *-weighted sequences can be used with MRI contrast, mainly ferucarbotran or superparamagnetic iron oxide (SPIO), to depict ...
CADASIL is a hereditary cerebrovascular disorder associated with T2-hyperintense white matter lesions that have a greater extent and earlier age of onset than age-related leukoaraiosis. See also [ edit ]
Posterior reversible encephalopathy syndrome; Other names: Reversible posterior leukoencephalopathy syndrome (RPLS) Posterior reversible encephalopathy syndrome visible on magnetic resonance imaging as multiple cortico-subcortical areas of T2-weighted hyperintense (white) signal involving the occipital and parietal lobes bilaterally and pons.
A Tornwaldt cyst (also spelt as Thornwaldt or Thornwald [1]) is a benign cyst located in the upper posterior nasopharynx.It was first described by Gustav Ludwig Tornwaldt.It can be seen on computed tomography (CT) or magnetic resonance imaging (MRI) of the head as a well-circumscribed round mass lying in the midline.
Fluid-attenuated inversion recovery (FLAIR) [2] is an inversion-recovery pulse sequence used to nullify the signal from fluids. For example, it can be used in brain imaging to suppress cerebrospinal fluid so as to bring out periventricular hyperintense lesions, such as multiple sclerosis plaques.
This produces methemoglobin whose paramagnetic effect results in hematomas appearing hyperintense on T1- and T2-weighted images. [14] In the chronic stage, the periphery of adrenal hematoma gradually becomes hyperintense, leaving a hypointense rim on T1- and T2-weighted images due to the hemosiderin deposition and development of a fibrous ...