High spatial resolution 3D MR cholangiography with high sampling efficiency technique (SPACE): Comparison of 3 T vs. 1.5 T
High spatial resolution 3D MR cholangiography with high sampling efficiency technique (SPACE): Comparison of 3 T vs. 1.5 T
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DOI：
10.1016/j.ejrad.2008.08.003
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发表时间：
2010-01-01
影响因子：
3.3
通讯作者：
Togashi, Kaori
中科院分区：
文献类型：
--
作者：
Arizono, Shigeki;Isoda, Hiroyoshi;Togashi, Kaori
目的：本研究的目的是评价图像质量的三维磁共振胆管造影术（MRC）使用高采样效率技术（SPACE）在3 T与1.5 T相比。方法和材料：IRB批准的前瞻性研究进行了17名健康志愿者使用3和1.5 T MR扫描仪。MRC图像采用自由呼吸导航仪触发的3D T2加权快速自旋回波序列，使用SPACE（TR，> 2700 ms; TE，3 T时780 ms，1.5 T时801 ms;回波链长度，121;体素大小，1.1 mm x 1.0 mm x 0.84 mm）获得。在3和1.5 T之间比较胆总管（CBD）与肝脏的对比噪声比（CNRs）。采用五分量表比较总体图像质量和胆管第三分支（B2、B6和B8）的可视化。并比较胆囊管附着点的显示情况及胆管最高显示顺序。使用Wilcoxon符号秩检验比较结果：CBD和肝脏之间的CNR在3 T时显著高于1.5 T（p = 0.0006）。与1.5 T相比，3 T下的MRC显示出显著更高的总体图像质量（p = 0.0215）和更清晰的B2（p = 0.0183）和B6（p = 0.0106）可视化。在所有导管可见性分析中，3 T显示的评分高于1.5 T。结论：使用SPACE的3 T MRC提供的图像质量优于1.5 T SPACE技术，有助于在3 T下实现高分辨率3D MRC，图像质量极佳。(C)2008爱思唯尔爱尔兰有限公司保留所有权利。
Purpose: The aim of this study was to evaluate image quality of 3D MR cholangiography (MRC) using high sampling efficiency technique (SPACE) at 3 T compared with 1.5 T.Methods and materials: An IRB approved prospective study was performed with 17 healthy volunteers using both 3 and 1.5 T MR scanners. MRC images were obtained with free-breathing navigator-triggered 3D T2-weighted turbo spin-echo sequence with SPACE (TR, > 2700 ms; TE, 780 ms at 3 T and 801 ms at 1.5 T; echo-train length, 121; voxel size, 1.1 mm x 1.0 mm x 0.84 mm). The common bile duct (CBD) to liver contrast-to-noise ratios (CNRs) were compared between 3 and 1.5 T. A five-point scale was used to compare overall image quality and visualization of the third branches of bile duct (B2, B6, and B8). The depiction of cystic duct insertion and the highest order of bile duct visible were also compared. The results were compared using the Wilcoxon signed-ranks test.Results: CNR between the CBD and liver was significantly higher at 3 T than 1.5 T (p = 0.0006). MRC at 3 T showed a significantly higher overall image quality (p = 0.0215) and clearer visualization of B2 (p = 0.0183) and B6 (p = 0.0106) than at 1.5 T. In all analyses of duct visibility, 3 T showed higher scores than 1.5 T.Conclusion: 3 T MRC using SPACE offered better image quality than 1.5 T SPACE technique facilitated high-resolution 3D MRC with excellent image quality at 3 T. (C) 2008 Elsevier Ireland Ltd. All rights reserved.