Ito Katsuyoshi, Koike Shinji, Jo Chisaki, Shimizu Ayame, Kanazawa Hitoshi, Miyazaki Mitsue, Yamauchi Shuichi, Matsunaga Naofumi
Department of Radiology, Yamaguchi University School of Medicine, 1-1-1 Minami Kogushi, Ube, Yamaguchi 755-8505, Japan.
AJR Am J Roentgenol. 2002 Feb;178(2):343-8. doi: 10.2214/ajr.178.2.1780343.
The purpose of this study was to evaluate the intraportal blood flow distribution from splenic and superior mesenteric veins with an unenhanced MR angiographic technique using single breath-hold ECG-triggered three-dimensional (3D) half-Fourier fast spin-echo sequence and selective inversion-recovery tagging pulse.
Seventeen healthy volunteers were included in this prospective study. After obtaining regular single breath-hold ECG-triggered 3D half-Fourier fast spin-echo images without applying a tagging pulse, we placed the selective inversion-recovery tagging pulse on the superior mesenteric vein (TAG-A), the splenic vein (TAG-B), or on both (TAG-C) to study the inflow correlation of tagged or marked blood into the portal vein. MR images were evaluated subjectively by three reviewers.
On MR images obtained using the TAG-A pulse to suppress the signal flow from the superior mesenteric vein into the portal vein, the most common pattern of signal loss was observed on the right half of the main portal vein (8/17 subjects). Conversely, on the MR images obtained using the TAG-B pulse, signal loss of the left half of the main portal vein was the most common pattern (11/17 subjects). Signal reduction from the splenic venous flow in the left portal vein was significantly greater than that from the superior mesenteric venous flow (p<0.05).
The unenhanced MR angiographic technique using single breath-hold ECG-triggered 3D half-Fourier fast spin echo with selective inversion-recovery tagging pulse has the potential to assess the intraportal blood flow distribution from the splenic and superior mesenteric veins.
本研究旨在使用单次屏气心电图触发的三维（3D）半傅里叶快速自旋回波序列和选择性反转恢复标记脉冲的非增强磁共振血管造影技术，评估脾静脉和肠系膜上静脉的门静脉内血流分布。
17名健康志愿者纳入本前瞻性研究。在未施加标记脉冲获得常规单次屏气心电图触发的3D半傅里叶快速自旋回波图像后，我们将选择性反转恢复标记脉冲置于肠系膜上静脉（标记A）、脾静脉（标记B）或两者上（标记C），以研究标记或标记血液流入门静脉的相关性。三名阅片者对磁共振图像进行主观评估。
在使用标记A脉冲抑制肠系膜上静脉流入门静脉的信号流而获得的磁共振图像上，在门静脉主干右半部分观察到最常见的信号丢失模式（17名受试者中的8名）。相反，在使用标记B脉冲获得的磁共振图像上，门静脉主干左半部分的信号丢失是最常见的模式（17名受试者中的11名）。脾静脉在门静脉左支的血流信号减少明显大于肠系膜上静脉的血流信号减少（p<0.05）。
使用单次屏气心电图触发的3D半傅里叶快速自旋回波结合选择性反转恢复标记脉冲的非增强磁共振血管造影技术有潜力评估脾静脉和肠系膜上静脉的门静脉内血流分布。
