A means to accommodate residual limb movement during optical scanning: a technical note.
A means to accommodate residual limb movement during optical scanning: a technical note.
复制标题
光学扫描期间适应残肢运动的方法：技术说明。
DOI：
10.1109/tnsre.2008.2003388
复制
发表时间：
2008
期刊：
影响因子：
--
通讯作者：
Lee,GregoryS
中科院分区：
文献类型：
--
作者：
Sanders,JoanE;Lee,GregoryS
描述了一种用于校正对象运动的技术，同时成像具有经胫骨截肢的人的残肢。在残肢上放置小的反射标记，然后使用两个固定的摄像头在扫描过程中跟踪它们的运动。标记位置测量被用来生成适当的平移和旋转变换矩阵，以便可以在1.5-S扫描间隔期间校正肢体运动。评估测试表明，对于中等(2-4 mm)到高(5-8 mm)运动的情况，性能良好。当使用运动校正时，与不使用运动校正时相比，测试扫描和静止参考扫描之间的平均绝对横截面面积的差异减小了大约一半。该算法在夸张运动(GES 9 Mm)的情况下失效，特别是在标记所包含的区域之外的区域。开发的方法在需要高分辨率形状测量的假肢研究中很有用，例如在需要关注残肢形状或体积变化的情况下。
A technique is described for correcting for subject movement while imaging the residual limb of a person with a transtibial amputation. Small reflective markers were placed on the residual limb, and then their motions tracked during scanning using two stationary cameras. The marker position measurements were used to generate appropriate translational and rotational transformation matrices so that limb motion could be corrected for during the 1.5-s scan interval. Evaluation tests showed good performance for moderate (2-4 mm) to high (5-8 mm) motion cases. The difference in mean absolute cross-sectional area between the test scan and a stationary reference scan was reduced by approximately one half when motion correction was used compared with when motion correction was not used. The algorithm broke down for exaggerated motion (ges 9 mm) cases, particularly in areas outside the region encompassed by the markers. The developed method is useful in prosthetics research where high resolution shape measurement is needed, for example in cases where residual limb shape or volume change is of interest.