正常女性盆底磁共振成像应用

Application of magnetic resonance imaging in normal female pelvic floor

目的利用动态MRI来评估正常女性的盆腔脏器及盆底肌肉在静息状态与盆腔最大用力排便时的运动情况以及形态的变化。使其一定程度上为盆底功能性疾病的影像学诊断拟定相对正常的影像学标准。方法本研究对20例志愿者进行盆腔动态MRI检查,用于观测前、中、后盆腔脏器的位置、运动范围和盆底肌肉形态及运动程度。结果对本组志愿者以耻尾线(PCL线)为参考线,测量盆腔脏器最大用力排便时平均下降距离,子宫颈为(21.37±5.8)mm,膀胱颈为(9.51±2.6)mm,肛直肠连接为(-14.75±5.73)mm。而肛提肌形态变化不明显。结论动态MRI是研究女性盆底解剖与形态学的有效方法。正常女性盆腔动态MRI与静息状态相比,力排时盆腔器官在一定范围内运动,形态学变化不明显。

Objective Dynamic MRI was used to evaluate the movement and orphological changes of normal female pelvic or- gans and pelvic floor muscles in resting state and the maximal forced defecation of the pelvis. To a certain extent, the imaging di- agnosis of pelvic floor functional disease was to make relatively normal imaging standards. Methods In this study, 20 volunteers were examined by pelvic dynamic MR to observe the position, range of motion and pelvic floor muscle morphology and movement of the anterior, middle and posterior pelvic organs. Results For this group of volunteers with Puboeoecygeal line （PCL） as the reference line, the average drop distance of the pelvic organs to measure the maximum forced defecation were measured, the Uter- ine cervix was （21.37 ± 5.8） , the bladder neck was （9.51 ± 2.6） , the anoreetal junction was （ -14.75 ± 5.73 ）. And the mor- phological changes of the levator ani were not obvious. Conclusion Dynamic MRI is an effective method to study the anatomy and morphology of female pelvic floor. Compared with resting state, the dynamic MRI of the normal female pelvic organs, is in a certain range of motion in the maximal forced defecation, and the morphological changes are not obvious.