Intermediate
Technical
In the Industry Vocabulary Test
T2-weighted imaging
MRI sequence that emphasizes differences in T2 relaxation times between tissues, producing bright signal from fluid-containing structures.
Full Definition
T2-weighted imaging is a fundamental MRI pulse sequence that highlights the transverse relaxation properties of tissues. In T2-weighted images, cerebrospinal fluid appears bright white, while most brain tissue appears in various shades of gray. This sequence is particularly valuable for detecting pathology such as edema, inflammation, and lesions, which typically appear hyperintense (bright) due to increased water content. T2-weighted imaging is essential for stroke evaluation, tumor detection, and assessment of white matter diseases.
Usage
Usage note: Always hyphenate when used as an adjective modifier.
In Context
- "The radiologist noted hyperintense lesions on T2-weighted imaging consistent with demyelinating disease." — Radiology report
- "Protocol includes sagittal T1-weighted and axial T2-weighted imaging of the entire brain." — MRI procedure note
Also known as
T2WI
T2 sequence
Contrasted with
T1-weighted imaging
Don't confuse with
T1-weighted imaging
proton density imaging