The authors report on a study to determine the effect of cardiac-type motion in the phase-encoding direction on the determination of T/sub 1//T/sub 2/, th ratio of the tissue relaxation times, from multiecho spin-echo and inversion recovery nuclear magnetic resonance (NMR) data, with and without triggering. A motion phantom was designed to imitate the speed of heart wall motion. The phantom was also lined with material to simulate myocardial T/sub 1//T/sub 2/. It was found that neither oscillatory motion in the phase-encoding direction nor frequency variations significantly affect measurements of T/sub 1/ and T/sub 2/ as long as multiple data points are used and partial volumes with blood or other tissues are avoided.
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机译：作者报告了一项研究，该研究旨在确定心型运动在相位编码方向上对多回旋自旋回波确定T / sub 1 // T / sub 2 /组织松弛时间的比率的影响。和反演恢复核磁共振（NMR）数据（带或不带触发）。运动体模被设计为模仿心脏壁运动的速度。幻影还衬有模拟心肌T / sub 1 // T / sub 2 /的材料。已经发现，只要使用多个数据点并且避免血液或其他组织的部分体积，在相位编码方向上的振荡运动和频率变化都不会显着影响T / sub 1 /和T / sub 2 /的测量。
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