Coronary MR angiography.

Abstract

The principles underlying coronary MR angiographic pulse sequences are reviewed, including basic coronary anatomy, motion, and flow physiology. Coronary MR angiographic techniques can be subdivided into breath-hold (single or repeated) and nonbreath-hold techniques. The recent introduction of navigator pulses for real-time respiratory gating or triggering allows nonbreath-hold or repeated breath-hold 3-D coronary MR angiography, and will allow a more widespread use of this technique.