Quantitative 3D analysis of levator ani muscle subdivisions in nulliparous women : MRI feasibility study

Moser, Nathalie; Skawran, Stephan; Steigmiller, Klaus; Röhrnbauer, Barbara; Winklehner, Thomas; Reiner, Cäcilia S.; Betschart, Cornelia

doi:10.3390/diagnostics14090923

Please use this identifier to cite or link to this item: https://doi.org/10.21256/zhaw-31120

Publication type:	Article in scientific journal
Type of review:	Peer review (publication)
Title:	Quantitative 3D analysis of levator ani muscle subdivisions in nulliparous women : MRI feasibility study
Authors:	Moser, Nathalie Skawran, Stephan Steigmiller, Klaus Röhrnbauer, Barbara Winklehner, Thomas Reiner, Cäcilia S. Betschart, Cornelia
et. al:	No
DOI:	10.3390/diagnostics14090923 10.21256/zhaw-31120
Published in:	Diagnostics
Volume(Issue):	14
Issue:	9
Page(s):	923
Issue Date:	29-Apr-2024
Publisher / Ed. Institution:	MDPI
ISSN:	2075-4418
Language:	English
Subjects:	3D-PICS; MRI; Levator ani; Morphometry; Nulliparous; Pelvic floor muscles
Subject (DDC):	616: Internal medicine and diseases
Abstract:	Background: The levator ani muscle (LAM) is crucial for pelvic floor stability, yet its quantitative MRI assessment is only a recent focus. Our study aims to standardize the quantitative analysis of the LAM morphology within the 3D Pelvic Inclination Correction System (3D-PICS). Methods: We analyzed 35 static MR datasets from nulliparous women examining the pubovisceral (PVM), iliococcygeal (ICM), coccygeal (COC), and puborectal muscle (PRM). The PVM consists of three origin-insertion pairs, namely the puboanal (PAM), puboperineal (PPM) and pubovaginal muscle (PVaM). The analysis included a quantitative examination of the morphology of LAM, focusing on the median location (x/y/z) (x: anterior–posterior, y: superior–inferior, z: left–right) of the origin and insertion points (a), angles (b) and lengths (c) of LAM. Inter-rater reliability was calculated. Results: Interindividual variations in 3D coordinates among muscle subdivisions were shown. In all, 93% of all origin and insertion points were found within an SD of <8 mm. Angles to the xz-plane range between −15.4° (right PRM) and 40.7° (left PAM). The PRM is the largest pelvic muscle in static MRI. The ICC indicated moderate-to-good agreement between raters. Conclusions: The accurate morphometry of the LAM and its subdivisions, along with reliable inter-rater agreement, was demonstrated, enhancing the understanding of normal pelvic anatomy in young nulliparous women.
URI:	https://digitalcollection.zhaw.ch/handle/11475/31120
Fulltext version:	Published version
License (according to publishing contract):	CC BY 4.0: Attribution 4.0 International
Departement:	School of Engineering
Organisational Unit:	Institute of Mechanical Systems (IMES)
Appears in collections:	Publikationen School of Engineering

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Moser, N., Skawran, S., Steigmiller, K., Röhrnbauer, B., Winklehner, T., Reiner, C. S., & Betschart, C. (2024). Quantitative 3D analysis of levator ani muscle subdivisions in nulliparous women : MRI feasibility study. Diagnostics, 14(9), 923. https://doi.org/10.3390/diagnostics14090923

Moser, N. et al. (2024) ‘Quantitative 3D analysis of levator ani muscle subdivisions in nulliparous women : MRI feasibility study’, Diagnostics, 14(9), p. 923. Available at: https://doi.org/10.3390/diagnostics14090923.

N. Moser et al., “Quantitative 3D analysis of levator ani muscle subdivisions in nulliparous women : MRI feasibility study,” Diagnostics, vol. 14, no. 9, p. 923, Apr. 2024, doi: 10.3390/diagnostics14090923.

MOSER, Nathalie, Stephan SKAWRAN, Klaus STEIGMILLER, Barbara RÖHRNBAUER, Thomas WINKLEHNER, Cäcilia S. REINER und Cornelia BETSCHART, 2024. Quantitative 3D analysis of levator ani muscle subdivisions in nulliparous women : MRI feasibility study. Diagnostics. 29 April 2024. Bd. 14, Nr. 9, S. 923. DOI 10.3390/diagnostics14090923

Moser, Nathalie, Stephan Skawran, Klaus Steigmiller, Barbara Röhrnbauer, Thomas Winklehner, Cäcilia S. Reiner, and Cornelia Betschart. 2024. “Quantitative 3D Analysis of Levator Ani Muscle Subdivisions in Nulliparous Women : MRI Feasibility Study.” Diagnostics 14 (9): 923. https://doi.org/10.3390/diagnostics14090923.

Moser, Nathalie, et al. “Quantitative 3D Analysis of Levator Ani Muscle Subdivisions in Nulliparous Women : MRI Feasibility Study.” Diagnostics, vol. 14, no. 9, Apr. 2024, p. 923, https://doi.org/10.3390/diagnostics14090923.