Liu S, Zhang Q, Yin C, Chen W, Chan Q, He J, Zhu B
Department of Radiology, Children's Hospital of Nanjing Medical University, Nanjing, 210008, China.
Department of Radiology, Jiangsu Province Official Hospital, Nanjing, 210024, China.
Clin Radiol. 2018 Jul;73(7):678.e7-678.e12. doi: 10.1016/j.crad.2018.03.012. Epub 2018 Apr 30.
To determine the optimal repetition time (TR) of cine imaging for uterine peristalsis on 3 T magnetic resonance imaging (MRI).
Twenty-three young female volunteers (age range: 23-28 years, mean: 24.91±1.12 years) underwent 3 T MRI for uterine peristalsis in the periovulatory phase. A midsagittal section of their uteri was scanned using a single-shot fast spin echo sequence with TR of 2 seconds (Cine) and 4 seconds (Cine) for 3 minutes. Subjective image-quality scores, signal-to-noise ratios (SNRs), and contrast-to-noise ratios (CNRs) of these MRI images were evaluated by two radiologists independently. The number, direction, and intensity of uterine peristalsis in the MRI images with two TRs were compared at 15 times the actual speed.
The SNR (263.14±91.54) and CNR (134.30±46.91) in Cine were significantly higher than those in Cine (209.01±96.53, 104.05±50.19; p=0.042, 0.015, respectively); however, no significant differences were found in other objective indexes and subjective image quality score (p>0.05). In addition, the peristaltic number of Cine (7.13±1.58) was significantly higher than that in Cine (5.30±1.06). Cine could identify peristaltic directions more clearly than Cine; however, no significant difference was observed in the intensity of uterine peristalsis between Cine and Cine (p=0.509).
At 3 T MRI, the number and direction of endometrium peristalsis could was displayed better using Cine than Cine, with the uncompromised image quality.
确定3T磁共振成像（MRI）下子宫蠕动电影成像的最佳重复时间（TR）。
23名年轻女性志愿者（年龄范围：23 - 28岁，平均：24.91±1.12岁）在排卵期接受3T MRI检查子宫蠕动。使用单次激发快速自旋回波序列对其子宫矢状面进行扫描，TR分别为2秒（电影成像）和4秒（电影成像），持续3分钟。由两名放射科医生独立评估这些MRI图像的主观图像质量评分、信噪比（SNR）和对比噪声比（CNR）。以实际速度的15倍比较两种TR的MRI图像中子宫蠕动的次数、方向和强度。
电影成像中SNR（263.14±91.54）和CNR（134.30±46.91）显著高于电影成像（分别为209.01±96.53、104.05±50.19；p = 0.042和 p = 0.015）；然而，在其他客观指标和主观图像质量评分方面未发现显著差异（p>0.05）。此外，电影成像的蠕动次数（7.13±1.58）显著高于电影成像（5.30±1.06）。电影成像比电影成像能更清晰地识别蠕动方向；然而，电影成像和电影成像之间子宫蠕动强度未观察到显著差异（p = 0.509）。
在3T MRI下，使用电影成像比电影成像能更好地显示子宫内膜蠕动的次数和方向，且图像质量不受影响。
