Volumetric segmentation analysis of the levator ani muscle using magnetic resonance imaging in pelvic floor function assessment

IF 1.4 4区 医学 Q3 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING
Diagnostic and interventional radiology Pub Date : 2024-07-08 Epub Date: 2024-02-20 DOI:10.4274/dir.2024.232586
Ayşenur Buz Yaşar, Rüveyde Begüm Yüzok, Emine Dağıstan
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引用次数: 0

Abstract

Purpose: In this case-control study, we aimed to evaluate how muscle volume affects pelvic floor function by analyzing the levator ani muscle (LAM) using volumetric segmentation in addition to standard magnetic resonance (MR) defecography assessments.

Methods: We enrolled 85 patients with varying degrees of pelvic floor dysfunction (PFD) and 85 age- and gender-matched controls in this retrospective study. All patients had MR defecography images, while all controls had pelvic MR images obtained for other reasons. Group comparisons were performed using independent samples t-tests and Mann-Whitney U tests. The receiver operating curve (ROC) was constructed to establish a cut-off value for a normal LAM volume. Interrater reliability was assessed by calculating the intraclass correlation coefficient. A P value of less than 0.05 was considered statistically significant.

Results: Volumetric measurements revealed that the control group had higher LAM volumes, and the ROC curve analysis indicated a cut-off value of 38934.3 mm3 with a sensitivity of 0.812 and specificity of 0.8 for PFD assessment using LAM volumetric measurement. Gender did not significantly affect LAM volume in the control group.

Conclusion: Alongside the useful structural and functional information acquired from MR defecography images, volumetric analysis, and three-dimensional reconstructions of LAM may help to improve the accuracy of the diagnosis.

利用磁共振成像对盆底功能评估中的提肛肌进行体积分割分析。
目的:在这项病例对照研究中,我们的目的是在标准磁共振(MR)排便造影评估的基础上,通过对提肛肌进行体积分割分析,评估肌肉体积对盆底功能的影响:在这项回顾性研究中,我们招募了 85 名患有不同程度盆底功能障碍 (PFD) 的患者和 85 名年龄和性别匹配的对照组患者。所有患者都有磁共振排便造影图像,而所有对照组都有因其他原因获得的盆腔磁共振图像。采用独立样本 t 检验和 Mann-Whitney U 检验进行组间比较。通过构建接收器操作曲线(ROC)来确定正常 LAM 体积的临界值。通过计算类内相关系数来评估相互之间的可靠性。P值小于0.05为具有统计学意义:容积测量显示,对照组的 LAM 容积较大,ROC 曲线分析表明,使用 LAM 容积测量评估 PFD 的临界值为 38934.3 mm3,灵敏度为 0.812,特异度为 0.8。在对照组中,性别对 LAM 体积没有明显影响:结论:除了从磁共振排便造影图像中获得有用的结构和功能信息外,LAM 的体积分析和三维重建也有助于提高诊断的准确性。
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来源期刊
Diagnostic and interventional radiology
Diagnostic and interventional radiology Medicine-Radiology, Nuclear Medicine and Imaging
自引率
4.80%
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0
期刊介绍: Diagnostic and Interventional Radiology (Diagn Interv Radiol) is the open access, online-only official publication of Turkish Society of Radiology. It is published bimonthly and the journal’s publication language is English. The journal is a medium for original articles, reviews, pictorial essays, technical notes related to all fields of diagnostic and interventional radiology.
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