FLAIR sequence
Also written as: FLAIR — Fluid-Attenuated Inversion Recovery
Fluid-attenuated inversion recovery MRI sequence that suppresses cerebrospinal fluid signal to better visualize brain lesions.
Full Definition
Fluid-attenuated inversion recovery (FLAIR) is a specialized MRI sequence commonly used in neuro-oncology to evaluate brain tumors. By suppressing the signal from cerebrospinal fluid, FLAIR imaging enhances the contrast between normal brain tissue and pathological lesions, making it particularly useful for detecting periventricular tumors, edema, and subtle infiltrative changes. This sequence is essential in tumor surveillance and treatment planning, as it can reveal tumor extent that may not be apparent on conventional T1 or T2 imaging.
Usage
Usage note: Always capitalize FLAIR as it is an acronym. Do not use as a verb.
In Context
- "The FLAIR sequence showed hyperintense signal changes extending beyond the enhancing tumor margin." — Radiology report
- "Post-treatment FLAIR imaging revealed persistent T2 hyperintensity in the surgical bed." — Follow-up assessment