Yvonne Hsu1, Christina Lewicky-Gaupp, John O L DeLancey. 1. Pelvic Floor Research Group and Division of Gynecology, Department of Obstetrics and Gynecology, University of Michigan Medical School, Ann Arbor, MI, USA.
Abstract
OBJECTIVE: The objective of the study was to identify characteristic anatomical features of the posterior compartment using magnetic resonance (MR) cross-sectional anatomy and 3-dimensional (3-D) modeling. STUDY DESIGN: Supine, static proton-density MR images of 20 nulliparas were analyzed. MR images were used to create models in a selected exemplar. RESULTS: The compartment's upper, mid, and lower segments are best seen in the axial plane. It is bounded inferiorly by the perineal body, ventrally by the posterior vaginal wall, and dorsally by the levator ani muscles and coccyx. In the upper portion, the compartment is bordered laterally by the uterosacral ligaments, whereas in the middle portion, there is more direct contact with the lateral levator ani muscles. In the lower portion, the contact becomes obliterated because the vagina and levator ani muscles become fused to each another and to the perineal body. CONCLUSION: The posterior compartment has characteristic anatomic features in MR cross-sectional anatomy that can be further elucidated and integrated with 3-D anatomy.
OBJECTIVE: The objective of the study was to identify characteristic anatomical features of the posterior compartment using magnetic resonance (MR) cross-sectional anatomy and 3-dimensional (3-D) modeling. STUDY DESIGN: Supine, static proton-density MR images of 20 nulliparas were analyzed. MR images were used to create models in a selected exemplar. RESULTS: The compartment's upper, mid, and lower segments are best seen in the axial plane. It is bounded inferiorly by the perineal body, ventrally by the posterior vaginal wall, and dorsally by the levator ani muscles and coccyx. In the upper portion, the compartment is bordered laterally by the uterosacral ligaments, whereas in the middle portion, there is more direct contact with the lateral levator ani muscles. In the lower portion, the contact becomes obliterated because the vagina and levator ani muscles become fused to each another and to the perineal body. CONCLUSION: The posterior compartment has characteristic anatomic features in MR cross-sectional anatomy that can be further elucidated and integrated with 3-D anatomy.
Authors: Rebecca U Margulies; Yvonne Hsu; Rohna Kearney; Tamara Stein; Wolfgang H Umek; John O L DeLancey Journal: Obstet Gynecol Date: 2006-05 Impact factor: 7.661
Authors: Yvonne Hsu; Aimee Summers; Hero K Hussain; Kenneth E Guire; John O L Delancey Journal: Am J Obstet Gynecol Date: 2006-03-31 Impact factor: 8.661
Authors: W Andre Silva; Rachel N Pauls; Jeffrey L Segal; Christopher M Rooney; Steven D Kleeman; Mickey M Karram Journal: Obstet Gynecol Date: 2006-08 Impact factor: 7.661
Authors: Christina Lewicky-Gaupp; Aisha Yousuf; Kindra A Larson; Dee E Fenner; John O L Delancey Journal: Am J Obstet Gynecol Date: 2010-05 Impact factor: 8.661
Authors: Colleen D McDermott; Jean Park; Colin L Terry; Patrick J Woodman; Douglass S Hale Journal: Int Urogynecol J Date: 2010-10-20 Impact factor: 2.894
Authors: Markus Huebner; Katharina Rall; Sara Yvonne Brucker; Christl Reisenauer; Katja Claudia Siegmann-Luz; John O L DeLancey Journal: Int Urogynecol J Date: 2014-03 Impact factor: 2.894
Authors: Julie A Tumbarello; Yvonne Hsu; Christina Lewicky-Gaupp; Suzan Rohrer; John O L DeLancey Journal: Int Urogynecol J Date: 2010-06-11 Impact factor: 2.894
Authors: Lennox Hoyte; Linda Brubaker; Julia R Fielding; Mark E Lockhart; Marta E Heilbrun; Caryl G Salomon; Wen Ye; Morton B Brown Journal: J Magn Reson Imaging Date: 2009-08 Impact factor: 4.813