全自动测量脊柱冠状面射线照片中的 Cobb 角度

Kenneth Chen, C. Stotter, T. Klestil, J. Mitterer, C. Lepenik, S. Nehrer
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引用次数: 0

摘要

背景/目的:脊柱侧弯是一种三维结构畸形,其特征是脊柱的侧向和旋转弯曲。目前评估脊柱侧弯的金标准方法是在冠状面射线照片中使用 Cobb 角测量脊柱侧弯。Cobb角测量的互变性高达10°。本研究的目的是描述和评估一种全自动测量 Cobb 角的方法的性能,该方法使用市售的人工智能(AI)模型,在超过 17,000 张图像上进行了训练,并研究其与参考标准之间的颞侧/侧后方一致性。方法:本研究共包括 196 张 AP/PA 全脊柱 X 光片。参考标准由四位放射科医生制定,定义为他们的 Cobb 角度测量值的中位数。另外,基于人工智能的软件 IB Lab SQUIRREL(1.0 版)也对相同的射线照片进行了 Cobb 角测量。结果:将读者的 Cobb 角末端椎体选择与人工智能的输出结果进行比较后,194 个曲率被认为是有效的性能评估,显示末端椎体选择的准确率为 88.58%。人工智能的性能显示出非常低的绝对偏差,在 Cobb 角测量中,与参考标准的平均差和标准差为 0.16° ± 0.35°。参考标准与人工智能测量结果的 ICC 比较值为 0.97。结论:与放射科医生相比,人工智能模型在确定椎体末端方面表现出良好的结果,在自动测量 Cobb 角方面表现出优异的结果,可作为临床实践和研究中的可靠工具。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Fully Automated Measurement of Cobb Angles in Coronal Plane Spine Radiographs
Background/Objectives: scoliosis is a three-dimensional structural deformity characterized by lateral and rotational curvature of the spine. The current gold-standard method to assess scoliosis is the measurement of lateral curvature of the spine using the Cobb angle in coronal plane radiographs. The interrater variability for Cobb angle measurements reaches up to 10°. The purpose of this study was to describe and assess the performance of a fully automated method for measuring Cobb angles using a commercially available artificial intelligence (AI) model trained on over 17,000 images, and investigate its interrater/intrarater agreement with a reference standard. Methods: in total, 196 AP/PA full-spine radiographs were included in this study. A reference standard was established by four radiologists, defined as the median of their Cobb angle measurements. Independently, an AI-based software, IB Lab SQUIRREL (version 1.0), also performed Cobb angle measurements on the same radiographs. Results: after comparing the readers’ Cobb angle end vertebrae selection to the AI’s outputs, 194 curvatures were considered valid for performance assessment, displaying an accuracy of 88.58% in end vertebrae selection. The AI’s performance showed very low absolute bias, with a mean difference and standard deviation of differences from the reference standard of 0.16° ± 0.35° in the Cobb angle measurements. The ICC comparing the reference standard and the AI’s measurements was 0.97. Conclusions: the AI model demonstrated good results in the determination of end vertebrae and excellent results in automated Cobb angle measurements compared to radiologists and could serve as a reliable tool in clinical practice and research.
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