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Fig. 4 —First-pass contrast-enhanced MR images (2 R-R intervals/1.2 ms/58 ms [repetition time msec/TE msec/inversion time msec]) obtained during stress and at rest in patient with normal coronary artery. Subendocardial hypointensity was observed around circumference (arrows) of left ventricle on stress perfusion MR images. However, subendocardial hypointensity was observed to similar extent on rest perfusion MR images. Therefore, hypointensity area was considered to be artifact. First row shows stress images and second row shows rest images.