HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Figures Only Full Text All Versions of this Article: 2232010665v1 223/2/501    most recent Submit a response Alert me when this article is cited Alert me when eLetters are posted Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Bertschinger, K. M. Articles by Hilfiker, P. R. Search for Related Content PubMed PubMed Citation Articles by Bertschinger, K. M. Articles by Hilfiker, P. R.

Dynamic MR Imaging of the Pelvic Floor Performed with Patient Sitting in an Open-Magnet Unit versus with Patient Supine in a Closed-Magnet Unit¹

¹ From the Institute of Diagnostic Radiology (K.M.B., J.E.R., K.T., B.M., P.R.H.) and Department of Visceral and Transplant Surgery (F.H.H.), University Hospital Zurich, Rämistrasse 100, CH-8091 Zurich, Switzerland. Received March 26, 2001; revision requested April 25; revision received August 1; accepted September 17. Address correspondence to P.R.H. (e-mail: paul.hilfiker@mri-roentgen.ch).

PURPOSE: To compare open-magnet magnetic resonance (MR) imaging performed with the patient sitting with dynamic closed-magnet MR imaging of the pelvic floor performed with the patient supine.

MATERIALS AND METHODS: Thirty-eight patients underwent dynamic 1.5-T closed-magnet pelvic floor MR imaging while in the supine position. Midsagittal T2-weighted single-shot fast spin-echo and T1-weighted multiphase spoiled gradient-recalled-echo (SPGR) MR images were obtained before and after rectal contrast agent administration, respectively, with the patient at rest, straining, and maximally contracting the sphincter. Subsequently, the patient was transferred to an open 0.5-T system. Midsagittal multiphase T1-weighted SPGR MR images were then obtained every 2 seconds with the patient sitting while at rest, maximally contracting the sphincter, straining, and defecating. Images were analyzed with regard to presence of enteroceles, anterior rectoceles, intussusceptions, rectal descents, bladder descents, and vaginal vault descents.

RESULTS: All intussusceptions were missed at supine MR imaging. With sitting MR imaging as the reference standard, the sensitivity of supine MR imaging was 79% for depiction of bladder descents. When MR findings were graded and clinically irrelevant MR findings were excluded, sensitivity increased to 100% for depiction of bladder descents and anterior rectoceles and to 96% for depiction of rectal descents.

CONCLUSION: Dynamic supine MR imaging performed with a closed-configuration unit before and after rectal contrast agent administration appears to be an alternative to sitting MR defecography performed with an open-configuration unit for diagnosis of clinically relevant pelvic floor abnormalities.

© RSNA, 2002

Index terms: Pelvic organs, MR, 757.121411, 757.121412, 757.121416, 757.12143 • Pelvic organs, prolapse, 757.159, 80.1499 • Rectum, abnormalities, 757.159, 757.73

This article has been cited by other articles:

				Y. M. Law and J. R. Fielding MRI of Pelvic Floor Dysfunction: Review Am. J. Roentgenol., December 1, 2008; 191(6_Supplement): S45 - S53. [Abstract] [Full Text] [PDF]

				Y. M. Law and J. R. Fielding MRI of Pelvic Floor Dysfunction: Self-Assessment Module Am. J. Roentgenol., December 1, 2008; 191(6_Supplement): S54 - S59. [Abstract] [Full Text] [PDF]

				E. M. Hecht, V. S. Lee, T. P. Tanpitukpongse, J. S. Babb, B. Taouli, S. Wong, N. Rosenblum, J. A. Kanofsky, and G. L. Bennett MRI of Pelvic Floor Dysfunction: Dynamic True Fast Imaging with Steady-State Precession Versus HASTE Am. J. Roentgenol., August 1, 2008; 191(2): 352 - 358. [Abstract] [Full Text] [PDF]

				L. Boyadzhyan, S. S. Raman, and S. Raz Role of Static and Dynamic MR Imaging in Surgical Pelvic Floor Dysfunction RadioGraphics, July 1, 2008; 28(4): 949 - 967. [Abstract] [Full Text] [PDF]

				A. E. Solopova, F. H. Hetzer, B. Marincek, and D. Weishaupt MR Defecography: Prospective Comparison of Two Rectal Enema Compositions Am. J. Roentgenol., February 1, 2008; 190(2): W118 - W124. [Abstract] [Full Text] [PDF]

				E M ANDERSON, C G FERRETT, and I LINDSEY Imaging of the pelvic floor Imaging, December 1, 2006; 18(4): 218 - 227. [Abstract] [Full Text] [PDF]

				J. E. Roos, D. Weishaupt, S. Wildermuth, J. K. Willmann, B. Marincek, and P. R. Hilfiker Experience of 4 Years with Open MR Defecography: Pictorial Review of Anorectal Anatomy and Disease RadioGraphics, July 1, 2002; 22(4): 817 - 832. [Abstract] [Full Text] [PDF]