Consistency, precision, and accuracy of optical and electromagnetic shape-capturing systems for digital measurement of residual-limb anthropometrics of persons with transtibial amputation
Consistency, precision, and accuracy of optical and electromagnetic shape-capturing systems for digital measurement of residual-limb anthropometrics of persons with transtibial amputation
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DOI：
10.1682/jrrd.2006.08.0088
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发表时间：
2007-01-01
影响因子：
--
通讯作者：
Geil, Mark D.
中科院分区：
文献类型：
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作者：
Geil, Mark D.
计算机辅助设计 (CAD) 和计算机辅助制造系统已适应假肢的特定用途，为从业者提供了一种方法来数字化捕获患者肢体的形状，使用软件修改接受腔模型，并自动制造用于制造接受腔的正模型或接受腔本身。捕获的数字形状是三维 (3-D) 模型，从中可以轻松获得标准人体测量数据。本研究记录了经胫骨截肢者残肢的三个泡沫正模型的 CAD 形状文件中的 6 个常见人体测量尺寸。使用两个系统来获得残肢的 3D 模型：非接触式光学系统和接触式电磁场系统，并由经验丰富的从业者和假肢学生进行测量。测量结果一致；所有测量的平均范围（最大值和最小值之差）为 0.96 厘米。两个系统都提供了相似的结果，并且两个小组都一致地使用了这些系统。学生的一致性比从业者稍好一些，但没有达到临床显着的程度。与传统测量结果相比，结果也毫不逊色，与手工测量的差异约为 5 毫米。这些结果表明常规使用数字形状捕获来收集患者体积信息。
Computer-aided design (CAD) and computer-aided manufacturing systems have been adapted for specific use in prosthetics, providing practitioners with a means to digitally capture the shape of a patient's limb, modify the socket model using software, and automatically manufacture either a positive model to be used in the fabrication of a socket or the socket itself The digital shape captured is a three-dimensional (3-D) model from which standard anthropometric measures can be easily obtained. This study recorded six common anthropometric dimensions from CAD shape files of three foam positive models of the residual limbs of persons with transtibial amputations. Two systems were used to obtain 3-D models of the residual limb, a noncontact optical system and a contact-based electromagnetic field system, and both experienced practitioners and prosthetics students conducted measurements. Measurements were consistent; the mean range (difference of maximum and minimum) across all measurements was 0.96 cm. Both systems provided similar results, and both groups used the systems consistently. Students were slightly more consistent than practitioners but not to a clinically significant degree. Results also compared favorably with traditional measurement, with differences versus hand measurements about 5 mm. These results suggest the routine use of digital shape capture for collection of patient volume information.