Diagnostic Radiology, Montreal General Hospital, McGill University Health Center, Montreal, PQ, Canada.
J Magn Reson Imaging. 2013 Jul;38(1):161-7. doi: 10.1002/jmri.23946. Epub 2012 Nov 29.
To determine the optimal single shot fast spin echo (SSFSE) technique by varying interval between image acquisitions for cine MRI of uterine peristalsis.
MRI was performed in 13 premenopausal women (4 normal and 9 with benign pelvic pathology) in various phases of their menstrual cycle. Midsagittal uterus was scanned using a multiphasic SSFSE technique at 2-, 3-, and 4-s intervals over 2 min. Three readers independently and randomly evaluated for peristaltic frequency/2 min, longitudinal direction and intensity of peristalsis in three imaging parameters. Contrast-to-noise ratios (CNRs) were also obtained.
Peristaltic frequency for the 2, 3, and 4 s was 2.2 ± 2.3, 3.3 ± 1.5, and 3.6 ± 1.3 waves/2 min, respectively. It increased by 1.5 (95% confidence interval [CI]: 0.31-2.64) waves/2 min with 4 s compared with 2 s. Direction was detected for the 2, 3, and 4 s in 5/13(38%), 9/13(69%) and 12/13(92%) women. Compared with 2 s, intensity of peristalsis in endometrial movement (P = 0.04), signal change of the JZ (P = 0.03), and spread into outer myometrium (P = 0.02), CNRendometrium-JZ by 57% (P < 0.001), and CNRouter myometrium-JZ by 45% (P < 0.01) increased with 4 s.
Cine MRI with SSFSE sequence for uterine peristaltism is best performed using a 4-s scan interval.
通过改变电影磁共振成像（cine MRI）子宫蠕动的采集间隔，确定最佳的单次快速自旋回波（SSFSE）技术。
对 13 名绝经前妇女（4 名正常和 9 名良性盆腔病变）在月经周期的不同阶段进行 MRI 检查。使用多相位 SSFSE 技术对中矢状位子宫进行扫描，在 2 分钟内以 2、3 和 4 秒的间隔进行扫描。三位读者独立随机对三种成像参数（蠕动频率/2 分钟、蠕动的纵向方向和强度）进行评估。还获得了对比噪声比（CNR）。
2、3 和 4 秒的蠕动频率分别为 2.2±2.3、3.3±1.5 和 3.6±1.3 波/2 分钟。与 2 秒相比，4 秒时蠕动频率增加了 1.5 波/2 分钟（95%置信区间[CI]：0.31-2.64）。在 5/13（38%）、9/13（69%）和 12/13（92%）名女性中分别检测到 2、3 和 4 秒的蠕动方向。与 2 秒相比，子宫内膜运动的蠕动强度（P=0.04）、JZ 的信号变化（P=0.03）和向外肌层扩散（P=0.02）增加，子宫内膜-JZ 的 CNR 增加了 57%（P<0.001），外肌层-JZ 的 CNR 增加了 45%（P<0.01）。
使用 4 秒扫描间隔，单次快速自旋回波序列进行子宫蠕动的 cine MRI 效果最佳。
