Intermediate
Technical
IVT
nulling
MRI technique that suppresses signal from specific tissues by timing the inversion pulse to eliminate their signal.
Full Definition
Nulling is a fundamental MRI concept used extensively in cardiac imaging to selectively suppress signal from specific tissues. In late gadolinium enhancement imaging, the inversion time is carefully chosen to null normal myocardium, making areas of enhancement (scar or fibrosis) appear bright against a dark background. Proper nulling is critical for optimal contrast and accurate interpretation of pathological tissue enhancement.
Usage
Usage note: Often used with 'optimal' or 'proper' when describing technique quality.
In Context
- "Optimal nulling of normal myocardium was achieved with an inversion time of 280ms." — LGE imaging protocol
- "Poor nulling resulted in heterogeneous myocardial signal that obscured small areas of enhancement." — Image quality assessment
Also known as
signal nulling
tissue suppression
Contrasted with
signal enhancement
Don't confuse with
saturation
inversion