Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center, Songpa-Gu, Seoul, Korea.
J Magn Reson Imaging. 2014 Feb;39(2):269-75. doi: 10.1002/jmri.24155. Epub 2013 Apr 17.
To evaluate the effect of parallel imaging (PI) with different acceleration factors on the image quality and duct visibility of breathhold two-dimensional (2D) thick-slab single-shot turbo spin-echo (SSTSE) MR cholangiopancreatography (MRCP) images.
Breathhold 2D thick-slab SSTSE MRCP was performed three times, i.e., without PI, with PI factor 2, and with PI factor 3, at 1.5 Tesla (T) for each of 85 patients. Two, independent readers evaluated the image quality and the visibility of five duct segments and ranked their preference of the three MRCP sequences. The data were analyzed using the repeated-measures analysis of variance test, the Friedman test, and the linear-by-linear chi-square test.
MRCP sequences with PI factor 2 or 3 generated better image quality (P < 0.001) and an improved duct visibility for all duct segments (P ≤ 0.01), while no significant difference was noted between the MRCP sequences with PI factor 2 and PI factor 3 (P > 0.05). Among the three sequences, both readers most often preferred the MRCP with PI factor 3, followed by the MRCP with PI factor 2 (P < 0.001).
The application of PI improves the image quality and duct visibility in breathhold 2D thick-slab SSTSE MRCP.
评估不同加速因子的并行成像（PI）对屏气二维（2D）厚层单次激发涡轮自旋回波（SSTSE）MR 胆胰管成像（MRCP）图像质量和胆管可视性的影响。
对 85 例患者分别在 1.5T 进行 3 次屏气 2D 厚层 SSTSE MRCP 扫描，分别为无 PI、PI 因子 2 和 PI 因子 3。两位独立的读者评估图像质量和 5 个胆管段的可视性，并对这三种 MRCP 序列的偏好进行排序。使用重复测量方差分析、Friedman 检验和线性-by-linear 卡方检验对数据进行分析。
PI 因子 2 或 3 的 MRCP 序列产生了更好的图像质量（P<0.001）和所有胆管段的可视性提高（P≤0.01），而 PI 因子 2 和 PI 因子 3 的 MRCP 序列之间没有显著差异（P>0.05）。在这三种序列中，两位读者都更倾向于 PI 因子 3 的 MRCP，其次是 PI 因子 2 的 MRCP（P<0.001）。
PI 的应用提高了屏气 2D 厚层 SSTSE MRCP 的图像质量和胆管可视性。
