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Two‐dimensional multishot echo‐planar coronary MR angiography

1998; Wiley; Volume: 40; Issue: 6 Linguagem: Inglês

10.1002/mrm.1910400614

1522-2594

Glenn S. Slavin, Stephen J. Riederer, Richard L. Ehman,

Advanced NMR Techniques and Applications

Abstract This work presents a two‐dimensional (2D) multishot echo‐planar imaging (EPI) technique for magnetic resonance angiography (MRA) of individual coronary arteries in a 17‐heart‐beat breath‐hold. Conventional 2D and 3D segmented gradient‐echo (GRE) coronary MRA requires repetitive excitation of the same slice or slab within each cardiac cycle, which can result in reduced blood signal and in motion artifacts. Two‐dimensional multishot EPI can address these limitations by eliminating multiple excitations per cardiac cycle, using large flip‐angle excitations, markedly reducing the data acquisition window, and performing oblique multislice 2D imaging. The goal of this study was to assess the feasibility of breath‐hold 20 multishot EPI for multislice coronary MRA and to demonstrate its reliability by consistently acquiring high‐quality images of the coronary arteries in a series of 16 volunteers.