PDF(Pubmed)
Abstract：
(1) Background: The morphology of the pelvic cavity is important for decision-making in obstetrics. This study aimed to estimate the accuracy and reliability of pelvimetry measures obtained when radiologists manually label anatomical landmarks on three-dimensional (3D) pelvic models. A second objective was to design an automatic labeling method. (2) Methods: Three operators segmented 10 computed tomography scans each. Three radiologists then labeled 12 anatomical landmarks on the pelvic models, which allowed for the calculation of 15 pelvimetry measures. Additionally, an automatic labeling method was developed based on a reference pelvic model, including reference anatomical landmarks, matching the individual pelvic models. (3) Results: Heterogeneity among landmarks in radiologists\' labeling accuracy was observed, with some landmarks being rarely mislabeled by more than 4 mm and others being frequently mislabeled by 10 mm or more. The propagation to the pelvimetry measures was limited; only one out of the 15 measures reported a median error above 5 mm or 5°, and all measures showed moderate to excellent inter-radiologist reliability. The automatic method outperformed manual labeling. (4) Conclusions: This study confirmed the suitability of pelvimetry measures based on manual labeling of 3D pelvic models. Automatic labeling offers promising perspectives to decrease the demand on radiologists, standardize the labeling, and describe the pelvic cavity in more detail.
摘要：
（1）背景：盆腔形态对产科决策具有重要意义。这项研究旨在评估放射科医生在三维（3D）骨盆模型上手动标记解剖标志时获得的骨盆测量的准确性和可靠性。第二个目标是设计一种自动标记方法。(2)方法:3位操作者各分割10次计算机断层扫描。然后，三名放射科医生在骨盆模型上标记了12个解剖标志，这允许计算15项骨盆测量。此外,基于参考骨盆模型开发了一种自动标记方法，包括参考解剖标志，匹配各个骨盆模型。(3)结果：观察到放射科医生标记准确性中标志之间的异质性，一些地标很少被错误标记超过4毫米，而另一些则经常被错误标记10毫米或更多。向骨盆测量的传播是有限的；15项测量中只有一项报告中值误差超过5毫米或5°，所有措施都显示出中等至优秀的放射科医师间可靠性。自动方法优于手动标记。（4）结论：这项研究证实了基于3D骨盆模型的手动标记的骨盆测量措施的适用性。自动标签提供了有希望的观点，以减少对放射科医生的需求，标准化标签，并更详细地描述盆腔。
