T2 mapping
Cardiac MRI technique that quantifies myocardial edema and inflammation by measuring tissue T2 relaxation times.
Full Definition
T2 mapping is an advanced cardiac MRI sequence that provides quantitative assessment of myocardial tissue characteristics, particularly useful for detecting acute myocardial injury, inflammation, and edema. Unlike qualitative T2-weighted imaging, T2 mapping generates parametric maps with specific millisecond values for tissue relaxation times. Normal myocardial T2 values typically range from 50-55 ms at 1.5T, with elevated values indicating tissue edema from various causes including acute infarction, myocarditis, or transplant rejection.
Usage
Usage note: Always specify the magnetic field strength (1.5T or 3.0T) as normal values differ between platforms.
In Context
- "T2 mapping demonstrated elevated values of 65 ms in the anterior wall, consistent with acute myocardial edema." — Cardiac MRI report
- "The T2 mapping sequence was performed to assess for myocardial inflammation in suspected myocarditis." — MRI protocol description