Accuracy of digitization of bony landmarks for measuring change in scapular attitude
Accuracy of digitization of bony landmarks for measuring change in scapular attitude
复制标题
用于测量肩胛姿态变化的骨性标志数字化的准确性
DOI：
10.1243/09544119jeim480
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
T. Oxland
中科院分区：
文献类型：
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作者：
D. Bourne;A. Choo;W. Regan;D. Macintyre;T. Oxland
摘要 数字化骨标志是一种用于测量肩胛位置的常用技术，但尚未根据金标准进行验证。本研究的目的是使用安装在肩胛骨针上的光电标记作为金标准，确定该技术对四种生理手臂运动的准确性。八名受试者的外侧肩胛骨中插入了骨钉。用光电探针对肩胛骨上的三个点进行数字化：肩胛冈内侧根、肩峰后外侧角和肩胛骨下角。本研究测试的四种主动运动是盂肱外展、盂肱水平内收、手在背后和向前伸。每个动作的三个不同位置的三个骨性标志被数字化六次。一名受试者的数据因销松动而被拒绝。特定位置的整体均方根值误差范围为 2.0° 至 12.5°。完全外展位置的均方根值要高得多。比其他位置的误差（后倾，12.5°；向上旋转，7.3°；内旋，12.0°）。看来骨性标志的数字化可能是测量肩胛姿态变化的有效方法，但需要注意以下几点：完全外展位置具有较高的均方根值。误差，肩胛骨的小运动具有较高的误差百分比。
Abstract Digitizing bony landmarks is a common technique used to measure scapular position, but it has not been validated against a gold standard. The aim of this study was to determine the accuracy of this technique for four physiological arm movements using optoelectronic markers mounted on scapular bone pins as a gold standard. Eight subjects had bone pins inserted into their lateral scapular spine. Three points were digitized on the scapula with an optoelectronic probe: the medial root of the scapular spine, the posterolateral corner of the acromion, and the inferior angle of the scapula. The four active movements tested in this study were glenohumeral abduction, glenohumeral horizontal adduction, hand behind back, and forward reaching. The three bony landmarks were digitized six times in three different positions for each movement. Data from one subject were rejected secondary to pin loosening. The overall position-specific r.m.s. errors ranged from 2.0° to 12.5°. The full abduction position had considerably higher r.m.s. errors than the other positions (posterior tipping, 12.5°; upward rotation, 7.3°; internal rotation, 12.0°). It appears that the digitization of bony landmarks may be a valid method for measuring changes in scapular attitude with the following caveats: the full abduction position has a high r.m.s. error, and small scapular motions have high percentage errors.