SKELETAL TRACKING WITH SKELETAL FIXATION

步态分析在临床环境中的使用已经变得广泛。 评估患者的行走模式需要依附 皮肤表面的光学靶标。来自监测的数据 患者行走时这些靶点的位置提供了 为客观的人体运动研究奠定基础。在评估这些方面 数据，目标位置指示骨架的假设 位置通常会被忽略。 这项研究的目的是评估产生的误差的大小 通过使用皮肤包裹的目标追踪骨骼系统。到目前为止， 四名受试者的步态已经被测试使用表面-和 固定在小腿上的骨装靶子。结果表明，该系统具有较高的可靠性。 运动学误差主要发生在围绕和沿着长轴的 小腿。对这些错误进行建模似乎并不可行 仅考虑软组织的被动运动。 与标准步态分析相关的误差的量化 程序在测试验证过程中很重要。在.期间 在过去的一年里，我们在几次尝试中都失败了 靶点在股骨，同时保持可接受的水平 受试者舒适度和膝关节运动。我们已经放弃了更多 尝试股骨固定，并在7月终止了方案 1996年。

The use of gait analysis in clinical settings has become widespread. Evaluation of a patient's walking pattern requires the attachment of optical targets to the skin's surface. Data derived from monitoring the location of these targets while the patient walks provide the basis for objective human movement studies. In evaluating these data, the assumption that target positions indicate skeletal position is routinely ignored. This study's purpose is to evaluate the magnitude of error produced by tracking the skeletal system using skin-mounted targets. To date, the gait's of four subjects have been tested using surface- and bone-mounted targets affixed to the shank. The results indicate that kinematic errors occur primarily about and along the long axis of the lower leg. It does not appear feasible to model these errors taking into account only the passive motion of soft tissues. Quantification of the errors associated with standard gait analysis procedures is important in the test validation process. During the past year, we failed in several attempts to gain rigid fixation on the targets to the femur while maintaining an acceptable level of subject comfort and knee joint motion. We have abandoned further attempts at femoral fixation and terminated the protocol in July 1996.