PSIR
Also written as: PSIR — Phase-Sensitive Inversion Recovery
Phase-sensitive inversion recovery imaging sequence used to detect myocardial scarring with improved contrast between healthy and damaged tissue.
Full Definition
Phase-sensitive inversion recovery (PSIR) is a cardiac MRI sequence that enhances the detection of late gadolinium enhancement by providing superior contrast between normal myocardium and scar tissue. Unlike conventional inversion recovery sequences, PSIR maintains consistent image contrast regardless of variations in inversion time, making it particularly valuable for detecting small or subendocardial infarcts. The technique reconstructs both magnitude and phase information to create images with improved signal-to-noise ratio and more reliable scar detection.
Usage
Usage note: Capitalize all letters when used as an acronym.
In Context
- "PSIR images demonstrated subendocardial enhancement in the inferior wall." — Cardiac MRI interpretation
- "The PSIR sequence was acquired 10 minutes after gadolinium administration." — MRI protocol description