What is a T2 signal lesion?
T2-weighted images show cavernomas as lesions with low-intensity margins containing hemosiderin and high-intensity central areas indicating gliosis or acute bleeding . Cavernomas are found as single or multiple lesions.
What is T2 signal in white matter?
The periventricular WMHs were defined as T2/FLAIR signal alterations in direct contact with the ventricular system. The deep WMHs were defined as T2/FLAIR signal alterations distant from the ventricular system. Periventricular and deep white matter WHMs could co-exist.
What causes T2 hyperintense lesions?
Hyperintense spinal cord signal on T2-weighted images is seen in a wide-ranging variety of spinal cord processes. Causes including simple MR artefacts, trauma, primary and secondary tumours, radiation myelitis and diastematomyelia were discussed in Part A.
What does T2 signal mean on MRI?
transverse relaxation time
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. MRI IMAGING SEQUENCES.
What does high T2 signal mean on MRI?
An increase in T2 signal intensity is often associated with chronic compression of the spinal cord, and it is well established that chronic compression results in structural changes to the spinal cord.
What does hyperintense T2 signal mean?
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.
What causes increased T2 signal on MRI?
What is the difference between T1 and T2 in MRI?
The basic types of sequences used in brain MRI create either T1-weighted or T2-weighted images. In T1-weighted images, CSF and fluid appear dark. Gray matter is darker than white matter. In T2-weighted images, CSF and fluid have a higher signal intensity than tissue and therefore appear bright.
What is abnormal T2?
Abnormal brightness on a T2 image indicates a disease process such as trauma, infection, or cancer.
How do you treat white matter lesions?
There isn’t a specific treatment. The goal is to treat the cause of the damage and stop the disease from getting worse. Your doctor may prescribe medicines to lower your blood pressure or cholesterol.