Non-contrast-enhanced MR portography and hepatic venography with time-spatial labeling inversion pulses: comparison at 1.5 Tesla and 3 Tesla.
Non-contrast-enhanced MR portography and hepatic venography with time-spatial labeling inversion pulses: comparison at 1.5 Tesla and 3 Tesla.
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DOI：
10.1177/2058460115584110
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发表时间：
2015-05
影响因子：
1.1
通讯作者：
Togashi K
中科院分区：
文献类型：
--
作者：
Ohno T;Isoda H;Furuta A;Togashi K
3 T磁共振（MR）扫描仪是上腹部MR血管造影的一种有前途的工具。然而，关于3 T非增强MR门静脉造影和肝静脉造影的图像质量，目前尚无报道。比较和评价1.5 T（1.5 T）和3 T时非增强MR门静脉造影和时间-空间标记反转脉冲（Time-SLIP）肝静脉造影的图像。25名健康志愿者进行了检查，使用三维平衡稳态自由进动（bSSFP）与时间滑移。对于门静脉造影，我们使用一个标记脉冲（选择性反转恢复）和一个非选择性反转恢复脉冲;对于静脉造影，使用两个标记脉冲。对相对信噪比（SNR）和对比噪声比（CNR）进行量化，并对可视化质量进行评价。3 T时门静脉主干、门静脉右支和门静脉左支的CNR均优于1.5T。3 T时第4、5和8段门静脉分支的图像质量评分显著高于1.5 T。3 T时肝右静脉（RHV）的CNR显著低于1.5T时。1.5T时RHV和肝中静脉的图像质量评分高于3 T。对于RHV可视化，差异具有统计学显著性。与1.5 T相比，3 T时移的非对比增强MR门静脉造影显著改善了健康志愿者外周分支的可视化。1.5T非增强MR肝静脉成像优于3 T。
A 3 Tesla (3 T) magnetic resonance (MR) scanner is a promising tool for upper abdominal MR angiography. However, there is no report focused on the image quality of non-contrast-enhanced MR portography and hepatic venography at 3 T. To compare and evaluate images of non-contrast-enhanced MR portography and hepatic venography with time-spatial labeling inversion pulses (Time-SLIP) at 1.5 Tesla (1.5 T) and 3 T. Twenty-five healthy volunteers were examined using respiratory-triggered three-dimensional balanced steady-state free-precession (bSSFP) with Time-SLIP. For portography, we used one tagging pulse (selective inversion recovery) and one non-selective inversion recovery pulse; for venography, two tagging pulses were used. The relative signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) were quantified, and the quality of visualization was evaluated. The CNRs of the main portal vein, right portal vein, and left portal vein at 3 T were better than at 1.5 T. The image quality scores for the portal branches of segment 4, 5, and 8 were significantly higher at 3 T than at 1.5 T. The CNR of the right hepatic vein (RHV) at 3 T was significantly lower than at 1.5 T. The image quality scores of RHV and the middle hepatic vein were higher at 1.5 T than at 3 T. For RHV visualization, the difference was statistically significant. Non-contrast-enhanced MR portography with Time-SLIP at 3 T significantly improved visualization of the peripheral branch in healthy volunteers compared with1.5 T. Non-contrast-enhanced MR hepatic venography at 1.5 T was better than at 3 T.