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首页> 外文期刊>Journal of magnetic resonance imaging: JMRI >Impact of motion on T1 mapping acquired with inversion recovery fast spin echo and rapid spoiled gradient recalled-echo pulse sequences for delayed gadolinium-enhanced MRI of cartilage (dGEMRIC) in volunteers.
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Impact of motion on T1 mapping acquired with inversion recovery fast spin echo and rapid spoiled gradient recalled-echo pulse sequences for delayed gadolinium-enhanced MRI of cartilage (dGEMRIC) in volunteers.

机译：运动对通过反转恢复快速自旋回波和快速破坏的梯度回波脉冲序列获得的T1映射的影响，用于志愿者中延迟delayed增强的MRI（dGEMRIC）。

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PURPOSE: To evaluate the impact of motion on T1 values acquired by using either inversion-recovery fast spin echo (IR-FSE) or three-dimensional (3D) spoiled gradient recalled-echo (SPGR) sequences for delayed gadolinium-enhanced magnetic resonance imaging of cartilage (dGEMRIC) in volunteers. MATERIALS AND METHODS: Single-slice IR-FSE and 3D SPGR sequences were applied to perform dGEMRIC in five healthy volunteers. A mutual information-based approach was used to correct for image misregistration. Displacements were expressed as averaged Euclidean distances and angles. Averages of differences in goodness of fit (Deltachi(2)) tests and averages of relative differences in T1 values (DeltaT1) before and after motion correction were computed. RESULTS: Maximum Euclidean distance was 3.5 mm and 1.2 mm for IR-FSE and SPGR respectively. Mean +/- SD of Deltachi(2) were 10.18 +/- 8.4 for IR-FSE and -1.37 +/- 5.5 for SPGR. Mean +/- SD of DeltaT1 were 0.008 +/- 0.0048 for IR-FSE and -0.002 +/- 0.019 for FSPGR. Pairwise comparison of Deltachi(2) values showed a significant difference for IR-FSE, but not for 3D-SPGR. Significantly greater variability in T1 values was also noted for IR-FSE than for 3D-SPGR. CONCLUSION: Involuntary motion has a significant influence on T1 values acquired with IR-FSE, but not with 3D-SPGR in healthy volunteers.
机译：目的：评估运动对T1值的影响，方法是使用反向恢复快速自旋回波（IR-FSE）或三维（3D）变质梯度回波（SPGR）序列进行for增强磁共振成像志愿者的软骨（dGEMRIC）。材料与方法：采用单片IR-FSE和3D SPGR序列对5名健康志愿者进行dGEMRIC。基于互信息的方法用于纠正图像配准不良。位移表示为平均欧几里得距离和角度。计算运动校正前后拟合优度差异的平均值（Deltachi（2））和T1值的相对差异平均值（DeltaT1）。结果：IR-FSE和SPGR的最大欧氏距离分别为3.5 mm和1.2 mm。对于IR-FSE，Deltachi（2）的平均+/- SD为10.18 +/- 8.4，对于SPGR为-1.37 +/- 5.5。对于IR-FSE，DeltaT1的平均值+/- SD为0.008 +/- 0.0048，对于FSPGR，平均值为-0.002 +/- 0.019。 Deltachi（2）值的成对比较显示IR-FSE有显着差异，但3D-SPGR没有。与3D-SPGR相比，IR-FSE的T1值差异也更大。结论：在健康志愿者中，非自愿运动对通过IR-FSE获得的T1值具有显着影响，而对3D-SPGR则没有影响。

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