Department of Radiology, Amakusa Medical Center, Jikiba, Kameba, Amakusa city, Kumamoto, 863-0046, Japan.
Department of Diagnostic Radiology, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan.
Eur Radiol. 2018 Jun;28(6):2436-2443. doi: 10.1007/s00330-017-5240-y. Epub 2018 Jan 15.
The current study evaluated the clinical usefulness of the gradient and spin-echo (GRASE) sequence with single breath-hold in 3.0 T magnetic resonance cholangiopancreatography (MRCP). We compared the acquisition time and image quality between GRASE and breath navigator-triggered 3D turbo spin echo (3D TSE).
We examined 54 consecutive patients who underwent MRCP with GRASE and 3D TSE. We compared the image acquisition time and contrast-to-noise ratio (CNR) between the common bile duct (CBD) and liver. Overall image quality, blurring, motion artifacts and CBD visibility were scored on a 4-point scale by two radiologists. Paired t-tests were used to compare the variables.
The mean image acquisition time was 95 % shorter with the GRASE than with 3D TSE (GRASE: 20 s; 3D TSE: 6 min 27 s). The CNR of GRASE was significantly higher than that of 3D TSE (GRASE: 25.4 ± 13.9 vs. 3D TSE: 18.2 ± 9.6, p < 0.01). All qualitative scores for GRASE were significantly better than those for 3D TSE.
3.0 T MRCP with GRASE sequence with single breath-hold significantly improved the CNR of CBD with a 95 % shorter acquisition time compared with conventional 3D MRCP with 3D TSE.
• MRCP acquisition time was 95% shorter with GRASE than with 3D TSE. • Overall image quality of GRASE was significantly better than 3D TSE. • Pancreaticobiliary tree visibility with GRASE was better than that with 3D TSE.
本研究评估了单次屏气 3.0T 磁共振胰胆管成像（MRCP）中梯度回波和自旋回波（GRASE）序列的临床应用价值。我们比较了 GRASE 与呼吸导航触发三维涡轮自旋回波（3D TSE）序列的采集时间和图像质量。
我们对 54 例连续接受 GRASE 和 3D TSE 检查的患者进行了研究。我们比较了胆总管（CBD）和肝脏的采集时间和对比噪声比（CNR）。两位放射科医生采用 4 分制对总体图像质量、模糊度、运动伪影和 CBD 可视性进行评分。采用配对 t 检验比较变量。
GRASE 的平均图像采集时间比 3D TSE 缩短了 95%（GRASE：20s；3D TSE：6 分 27s）。GRASE 的 CNR 明显高于 3D TSE（GRASE：25.4±13.9 vs. 3D TSE：18.2±9.6，p＜0.01）。GRASE 的所有定性评分均明显优于 3D TSE。
与常规 3D TSE 三维 MRCP 相比，单次屏气 3.0T GRASE 序列 MRCP 可显著提高 CBD 的 CNR，采集时间缩短 95%。
GRASE 的 MRCP 采集时间比 3D TSE 缩短了 95%。
GRASE 的总体图像质量明显优于 3D TSE。
GRASE 对胰胆管树的可视性优于 3D TSE。
