Evaluation of a method to quantify posture and scapula position using biplanar radiography

IF 1.7 4区 医学 Q3 ENGINEERING, BIOMEDICAL
S. Bousigues , L. Gajny , W. Skalli , X. Ohl , P. Tétreault , N. Hagemeister
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Abstract

Background

Recent studies have stated the relevance of having new parameters to quantify the position and orientation of the scapula with patients standing upright. Although biplanar radiography can provide 3D reconstructions of the scapula and the spine, it is not yet possible to acquire these images with patients in the same position.

Methods

Two pairs of images were acquired, one for the 3D reconstruction of the spine and ribcage and one for the 3D reconstruction of the scapula. Following 3D reconstructions, scapular alignment was performed in two stages, a coarse alignment based on manual annotations of landmarks on the clavicle and pelvis, and an adjusted alignment. Clinical parameters were computed: protraction, internal rotation, tilt and upward rotation. Reproducibility was assessed on an in vivo dataset of upright biplanar radiographs. Accuracy was assessed using supine cadaveric CT-scans and digitally reconstructed radiographs.

Findings

The mean error was less than 2° for all clinical parameters, and the 95 % confidence interval for reproducibility ranged from 2.5° to 5.3°.

Interpretation

The confidence intervals were lower than the variability measured between participants for the clinical parameters assessed, which indicates that this method has the potential to detect different patterns in pathological populations.

使用双平面射线摄影量化姿势和肩胛骨位置的方法评估
背景最近的研究表明,在患者直立的情况下,有必要使用新的参数来量化肩胛骨的位置和方向。虽然双平面放射摄影可提供肩胛骨和脊柱的三维重建,但目前还无法在患者处于相同体位时获取这些图像。方法获取两对图像,一对用于脊柱和肋骨的三维重建,另一对用于肩胛骨的三维重建。三维重建后,肩胛骨对齐分两个阶段进行,一个是根据锁骨和骨盆上的地标进行人工标注的粗对齐,另一个是调整后的对齐。计算临床参数:前伸、内旋、倾斜和上旋。再现性是通过直立双平面X光片的活体数据集进行评估的。结果所有临床参数的平均误差均小于2°,可重复性的95%置信区间在2.5°到5.3°之间。释义就所评估的临床参数而言,置信区间低于参与者之间测得的变异性,这表明该方法有可能检测出病理人群中的不同模式。
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来源期刊
Medical Engineering & Physics
Medical Engineering & Physics 工程技术-工程:生物医学
CiteScore
4.30
自引率
4.50%
发文量
172
审稿时长
3.0 months
期刊介绍: Medical Engineering & Physics provides a forum for the publication of the latest developments in biomedical engineering, and reflects the essential multidisciplinary nature of the subject. The journal publishes in-depth critical reviews, scientific papers and technical notes. Our focus encompasses the application of the basic principles of physics and engineering to the development of medical devices and technology, with the ultimate aim of producing improvements in the quality of health care.Topics covered include biomechanics, biomaterials, mechanobiology, rehabilitation engineering, biomedical signal processing and medical device development. Medical Engineering & Physics aims to keep both engineers and clinicians abreast of the latest applications of technology to health care.
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