Liu Shanshan, Zhang Qi, Yin Chengying, Liu Song, Chan Queenie, Chen Weibo, He Jian, Zhu Bin
Department of Radiology, Nanjing Drum Tower Hospital, Affiliated Hospital of Nanjing University Medical School, Nanjing, China.
Department of Radiology, Jiangsu Province Official Hospital, Nanjing, China.
J Magn Reson Imaging. 2016 Dec;44(6):1397-1404. doi: 10.1002/jmri.25303. Epub 2016 May 18.
To determine the optimal slice thickness, playback rate, and scan time for uterine peristalsis with 3.0T magnetic resonance imaging (MRI).
In all, 23 young female volunteers underwent a 3.0T MRI scan with different slice thicknesses of 3 mm (Cine ), 5 mm (Cine ), and 7 mm (Cine ) for 6 minutes. Subjective image quality score, signal-to-noise ratios (SNRs), and contrast-to-noise ratios (CNRs) of those MR images were evaluated by two radiologists independently. The number, intensity, and direction of uterine peristalsis with different thickness were compared at various playback rates. Also, the peristalsis frequency was counted and compared in different acquisition durations (1-6 minutes).
The subjective image quality score, peristalsis number, and intensity were significantly higher in Cine and Cine than Cine (P < 0.05), while the SNRs and CNRs of Cine were significantly higher than Cine (P < 0.05). Peristalsis numbers did not differ significantly at different playback rates with the same slice thickness (P = 0.548-0.962). However, peristalsis intensity at 12×, and 15× was significantly greater than that at 8× the actual speed for Cine and Cine (P < 0.05). The peristalsis frequency at 3, 4, 5, 6 minutes was significantly higher than that at 1 minute and 2 minutes (P < 0.05).
We recommend a slice thickness of 5 mm or 7 mm and a scan time of 3 minutes for uterine peristalsis with 3.0T MRI, and a playback rate of 12× or 15× the actual speed for peristalsis observation. J. Magn. Reson. Imaging 2016;44:1397-1404.
确定3.0T磁共振成像（MRI）观察子宫蠕动的最佳层厚、回放速率和扫描时间。
共23名年轻女性志愿者接受3.0T MRI扫描，分别采用3mm（电影模式）、5mm（电影模式）和7mm（电影模式）的不同层厚，扫描6分钟。由两名放射科医生独立评估这些MR图像的主观图像质量评分、信噪比（SNR）和对比噪声比（CNR）。比较不同层厚在不同回放速率下子宫蠕动的次数、强度和方向。同时，计算并比较不同采集时长（1 - 6分钟）下的蠕动频率。
电影模式5mm和7mm组的主观图像质量评分、蠕动次数和强度显著高于电影模式3mm组（P < 0.05），而电影模式5mm组的SNR和CNR显著高于电影模式3mm组（P < 0.05）。相同层厚下，不同回放速率的蠕动次数差异无统计学意义（P = 0.548 - 0.962）。然而，电影模式5mm和7mm组在12倍和15倍实际速度下的蠕动强度显著大于8倍实际速度时（P < 0.05）。3、4、5、6分钟时的蠕动频率显著高于1分钟和2分钟时（P < 0.05）。
对于3.0T MRI观察子宫蠕动，我们推荐层厚为5mm或7mm，扫描时间为3分钟，蠕动观察的回放速率为实际速度的12倍或15倍。《磁共振成像杂志》2016年；44:1397 - 1404。
