Below-knee residual limb shape change measurement and visualization
Below-knee residual limb shape change measurement and visualization
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DOI：
10.1016/s0003-9993(98)90355-0
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发表时间：
1998-07-01
影响因子：
4.3
通讯作者：
Vannier, MW
中科院分区：
文献类型：
--
作者：
Commean, PK;Brunsden, BS;Vannier, MW
目的：测量和可视化假体内和假体之间残肢的形状变化(变形)的能力是改善假体适合性评估的重要步骤。目的：建立戴用假体后膝关节下残肢软组织形态变化的测量和可视化方法，以检测微小的形态变化(小于或等于30 mm)。设计：利用螺旋X线计算机断层成像技术，从假体配合度较差的假体中原位获取假体和残肢的三维体积数据。提出了一种新的总和投影深度阴影柱面映射技术，用于测量和可视化形状的微小变化。根据体积数据，利用多平面重建图像和柱状图测量放置在残肢皮肤表面的小铅标记物的相对位移。结果：从总和投影柱面图测量皮肤表面的形状变化或变形，其精度和准确度分别为1 mm和2 mm。结论：这些新的基于图像的测量和可视化方法为测量和显示不同假肢内和不同假体之间的残肢形状变化提供了一种可行的手段。(C)1998年由美国康复医学大会和美国物理医学和康复学会主办。
Objective: The ability to measure and visualize shape change (deformation) of a residual limb within and between prostheses is an important step toward improved prosthetic fit assessment. The objective was to develop measurement and visualization methods for below-knee residual limb soft tissue shape change after donning and loading a prosthesis to detect small shape changes (30mm or less).Design: Spiral X-ray computed tomography imaging was utilized to acquire 3D volumetric data of the below-knee residual limb and prosthesis in situ from poor- and a good-fitting prostheses without and with a load. A new sum projection depth-shaded cylindrical mapping technique to measure and visualize small changes in shape was developed. From the volumetric data, the relative displacement of small lead markers placed on the residual limb's skin surface were measured using multiplanar reconstruction images and cylindrical maps. Displacement measurements averaging 15mm or less were obtained.Results: The precision and accuracy was 1mm and 2mm, respectively, when measuring the shape change or deformation of the skin surface from the sum projection cylindrical maps. The skin surface deformation was at least 7mm or greater when comparing marker locations between scans with the prostheses in situ,Conclusion: These new image-based measurement and visualization methods provide a feasible means for measuring and displaying lower extremity residual limb shape change within and between different prostheses with and without loading. (C) 1998 by the American Congress of Rehabilitation Medicine ann the American Academy of Physical Medicine and Rehabilitation.