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Fig. 1B. —Coronary motion assessment in 56-year-old man with history of lateral wall myocardial infarction. Every third phase shown from same cine MR image as in A, with delay times after R-wave of 43-763 msec. Right coronary artery and circumflex artery can be seen in all phases. White circle represents position of right coronary artery at end-diastole to illustrate in-plane coronary motion in subsequent phases of cardiac cycle. There is no perceptible motion of coronary arteries between last three images (delay times, 603-764 msec). Subject-specific trigger delay for coronary MR angiography was therefore set to 603 msec, and acquisition window was set to 161 msec in this patient.

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