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Objective To develop a T2-prep method for cardiac imaging at 3T which is less sensitive toward B1 inhomogeneity, flow and motion than previously described techniques. Background T2 contrast is important for the assessment of acute myocardial edema and coronary morphology. At 1.5T, the standard T2 -prep method uses 4c omposite 180° pulses (MLEV4 [1]) providing robust and uniform T2-preparation, but at 3T, increased B1 inhomogeneity causes artifacts. Decreasing inter-pulse spacing improves refocusing in the presence of motion and flow. We developed a configurable T2-preparation allowing up to 4 adiabatic refocusing pulses (B1-insensitive) to study the effect of inter-pulse spacing on motion-robustness. We compared image homogeneity using MLEV4 as reference.

Design of an adiabatic T2-preparation method optimized for cardiac motion and flow insensitivity at 3T