STIR sequence
Short tau inversion recovery MRI sequence that suppresses fat signal to enhance visualization of myocardial edema and inflammation.
Full Definition
Short tau inversion recovery (STIR) is a specialized MRI pulse sequence that nulls the signal from fat tissue, making it particularly valuable in cardiac imaging for detecting myocardial edema and acute inflammation. The technique uses an inversion recovery pulse with a short inversion time (tau) to suppress fat signal while preserving signal from water-containing tissues. In cardiac applications, STIR sequences are especially useful for identifying acute myocardial infarction, myocarditis, and other inflammatory cardiac conditions where tissue water content is increased.
Usage
Usage note: Always specify as 'STIR sequence' rather than just 'STIR' to distinguish from other medical uses of the acronym.
In Context
- "The STIR sequence demonstrated hyperintense signal in the anterior wall, consistent with acute myocardial edema." — Cardiac MRI report
- "Fat suppression using STIR technique improved visualization of the inflammatory changes in the myocardium." — Technical protocol description