Nyström L, Söderkvist I, Wedin P A
Department of Biomedical Engineering, University Hospital, Umeå, Sweden.
J Biomech. 1994 Oct;27(10):1291-4. doi: 10.1016/0021-9290(94)90283-6.
When studying skeleton movements by using implanted landmarks and Roentgen stereo photogrammetric analysis (RSA), some identification problems arise. One is to put the same label on a landmark at different examinations, another is to use the correct pairs of landmark images in order to compute a correct three-dimensional position of each landmark. We will present some methods that can be used as a support for solving these problems. We will also show how it is possible to detect and exclude landmarks that are loose and landmarks that have large measurement errors in their positions.
在通过植入标志物和X射线立体摄影测量分析（RSA）研究骨骼运动时，会出现一些识别问题。一个问题是在不同检查中给同一个标志物贴上相同的标签，另一个问题是使用正确的标志物图像对，以便计算每个标志物的正确三维位置。我们将介绍一些可用于辅助解决这些问题的方法。我们还将展示如何检测并排除位置松动的标志物以及位置测量误差较大的标志物。
