Off-resonance insensitive complementary SPAtial Modulation of Magnetization (ORI-CSPAMM) for quantification of left ventricular twist.
Off-resonance insensitive complementary SPAtial Modulation of Magnetization (ORI-CSPAMM) for quantification of left ventricular twist.
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DOI：
10.1002/jmri.24154
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发表时间：
2014-02
影响因子：
4.4
通讯作者：
Ennis, Daniel B.
中科院分区：
文献类型：
--
作者：
Reyhan, Meral;Natsuaki, Yutaka;Ennis, Daniel B.
旨在评价用于量化左心室（LV）收缩和舒张功能的非共振不敏感互补空间磁化调制（ORI-CSPAMM）和刺激回波傅立叶分析（FAST），并将其与之前确认的FAST+SPAMM技术进行比较。使用ORI-CSPAMM和SPAMM采集健康志愿者（n=13）的LV短轴标记图像。FAST方法用于在约3分钟的用户交互后，通过围绕k空间中部旋转刺激回波和刺激反回波自动估计LV收缩和舒张扭转参数。FAST+ORI-CSPAMM和FAST+SPAMM获得的平均峰值扭转[12.9±3.4° vs. 11.9±4.0°，P=0.4]、扭转[3.3±0.9°/cm vs. 2.9±1.0°/cm，P=0.3]、CL剪切角[9.1±3.0° vs. 8.2±3.4°，P=0.3]测量值之间无显著差异，扭转率[79.6±20.2°/s vs. 68.2±23.4°/s，P=0.1]，解旋率[−117.5±31.4°/s vs. −106.6±32.4°/s，P=0.3]，归一化解旋率[−9.3±2.0/s vs. −9.9±4.4/s，P=0.7]，峰扭转时间[281± 18 ms vs.293 ± 25 ms，P=0.04]。FAST+ORI-CSPAMM还提供了解旋持续时间（148± 21 ms）和快速解旋与峰值扭转之比（0.9±0.3）的测量值。FAST+ORI-CSPAMM和FAST+SPAMM扭转数据的Bland-Altman分析显示，偏差为−0.1°，95%置信区间为[−1.0°，3.2°]，具有极好的一致性。FAST+ORI-CSPAMM是一种半自动化方法，可快速定量评估LV收缩期和舒张期扭转和扭转。ORI-CSPAMM校正了在标记制备和读出期间产生的非共振，并从标记图案中明显地去除了化学位移，这赋予了衍生的定量测量更大的鲁棒性。
To evaluate Off Resonance Insensitive Complementary SPAtial Modulation of magnetization (ORI-CSPAMM) and Fourier Analysis of STimulated echoes (FAST) for the quantification of left ventricular (LV) systolic and diastolic function and compare it to the previously validated FAST+SPAMM technique. LV short-axis tagged images were acquired with ORI-CSPAMM and SPAMM in healthy volunteers (n=13). The FAST method was used to automatically estimate LV systolic and diastolic twist parameters from rotation of the stimulated echo and stimulated anti-echo about the middle ofk-space subsequent to ~3 minutes of user interaction. There was no significant difference between measures obtained for FAST+ORI-CSPAMM and FAST+SPAMM for mean peak twist [12.9±3.4° vs. 11.9±4.0°, P=0.4], torsion [3.3±0.9°/cm vs. 2.9±1.0°/cm, P=0.3], CL-shear angle [9.1±3.0° vs. 8.2±3.4°, P=0.3], twisting rate [79.6±20.2°/s vs. 68.2±23.4°/s, P=0.1], untwisting rate [−117.5±31.4°/s vs. −106.6±32.4°/s, P=0.3], normalized untwisting rate [−9.3±2.0/s vs. −9.9±4.4/s, P=0.7], and time of peak twist [281±18ms vs. 293±25ms, P=0.04]. FAST+ORI-CSPAMM also provided measures of duration of untwisting (148±21ms) and the ratio of rapid untwisting to peak twist (0.9±0.3). Bland-Altman analysis of FAST+ORI-CSPAMM and FAST+SPAMM twist data demonstrates excellent agreement with a bias of −0.1° and 95% confidence intervals of [−1.0°, 3.2°]. FAST+ORI-CSPAMM is a semi-automated method that provides a quick and quantitative assessment of LV systolic and diastolic twist and torsion. ORI-CSPAMM corrects off-resonance accrued during tagging preparation and readout and visibly removes chemical shift from the tagging pattern, which confers greater robustness to the derived quantitative measures.
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