Hilfiker P R, Debatin J F, Schwizer W, Schoenenberger A W, Fried M, Marincek B
Institute of Diagnostic Radiology, University Hospital Zurich, Switzerland.
J Comput Assist Tomogr. 1998 Sep-Oct;22(5):749-55. doi: 10.1097/00004728-199809000-00016.
With the advent of open-configuration MR systems, enabling image acquisition in a vertical patient position, MR defecography has become possible. MR defecography permits analyses of the anorectal angle, opening of the anal canal, functioning of the puborectal muscle, and descent of the pelvic floor during defecation. The rectal walls are well delineated on the GRE images, permitting visualization of intussusceptions and rectoceles. The concomitant depiction of structures surrounding the anorectal canal is helpful in the assessment of a spastic pelvic floor and the descending perineum syndrome and in permitting visualization of enteroceles. Dynamic MR defecography is an attractive alternative in the evaluation of defecation disorders.
随着开放式磁共振（MR）系统的出现，能够在患者垂直体位下进行图像采集，磁共振排粪造影成为可能。磁共振排粪造影可分析肛管直肠角、肛管开口、耻骨直肠肌功能以及排便时盆底的下降情况。直肠壁在梯度回波（GRE）图像上清晰可辨，有助于观察肠套叠和直肠膨出。同时显示肛管直肠周围结构有助于评估盆底痉挛和会阴下降综合征，并能观察肠膨出。动态磁共振排粪造影在排便障碍评估中是一种有吸引力的替代方法。
