myocardial nulling
The optimal inversion time setting in cardiac MRI that suppresses normal myocardial signal to maximize contrast with enhanced tissue.
Full Definition
Myocardial nulling refers to the technique of selecting the appropriate inversion time in late gadolinium enhancement cardiac MRI sequences to completely suppress the signal from normal myocardium. This creates optimal contrast between healthy tissue (which appears dark) and areas of fibrosis or scar (which appear bright due to gadolinium retention). The nulling time varies between patients and must be individually optimized, typically occurring 200-300 ms after the inversion pulse. Proper nulling is critical for accurate scar detection and quantification.
Usage
Usage note: Specify the inversion time used when documenting nulling quality.
In Context
- "Optimal myocardial nulling was achieved with an inversion time of 280 ms." — MRI technical parameters
- "Poor myocardial nulling resulted in suboptimal contrast for scar detection." — Image quality assessment