What is T2 lesion volume?
What is T2 lesion volume?
Background Atrophied T2 lesion volume at MRI is an imaging measure that reflects the replacement of T2 lesions by cerebrospinal fluid spaces in patients with multiple sclerosis (MS).
What does T2-weighted mean in MRI?
Definition. A T2-weighted image is a basic pulse sequences in magnetic resonance (MR) imaging that depicts differences in the T2 relaxation time of various tissues.
What does T2-weighted signal mean?
T2 weighted image – Pathology (spine) The same areas are whiter than usual on this T2 image indicating increased water content. Abnormal brightness on a T2 image indicates a disease process such as trauma, infection, or cancer.
What is a T2 lesion on the kidney?
Low T2 signal intensity is a common feature of papillary renal cell carcinoma and fat-poor angiomyolipoma. Nonetheless, other types of renal cell carcinoma, oncocytoma, hemangioma, lymphoma, leiomyoma, and urothelial cell carcinoma also can show low signal intensities on T2-weighted imaging (T2WI).
What does T2 mean in the brain?
T2 (transverse relaxation time) is the time constant which determines the rate at which excited protons reach equilibrium or go out of phase with each other. It is a measure of the time taken for spinning protons to lose phase coherence among the nuclei spinning perpendicular to the main field.
What is a high T2 signal lesion?
T2 weighted imaging identifies MS lesions as high signal foci against the low signal background of white matter. However, periventricular lesions are often indistinguishable from the adjacent CSF which is also of high signal with T2 weighting.
What is a T2 hyperintense lesion?
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.
Should a low density kidney lesion be followed?
“The guidelines say that if the density of a mass on the kidney is less than 20 Hounsfield units (HU) it has a strong likelihood of being a cyst, and that is what most radiologists go by,” said Robert G.