A low-cost real time virtual system for postural stability assessment at home
A low-cost real time virtual system for postural stability assessment at home
复制标题
DOI：
10.1016/j.cmpb.2014.06.020
复制
发表时间：
2014-11-01
影响因子：
6.1
通讯作者：
Spezialetti, Matteo
中科院分区：
文献类型：
--
作者：
Placidi, Giuseppe;Avola, Danilo;Spezialetti, Matteo
背景和目标：老年人和许多疾病中平衡控制系统的退化需要经常测量平衡条件。在临床实践中，通常通过使用测力平台来评估平衡控制在本文中，我们展示了如何一个简单的运动分析系统，基于三维摄像机和三维真实的时间模型重建的人体，可以用来收集信息通常记录的物理稳定平台。方法：描述和讨论了用于将人体模型重建为一组球体的算法。此外，还报告了实验测量和与物理稳定性平台收集的数据的比较。测量收集了一组6名健康受试者的平衡条件的变化是通过执行一个平衡task.Results的刺激：实验结果表明，超过95%的数据收集的方法是没有显着不同的经典平台所收集的，从而证实了所提出的系统的实用性。所提出的虚拟平衡评估系统可以以低成本（大约500美元）实现，并且由于这个原因，可以被认为是家用医疗设备。相反，不稳定测量平台的成本约为10，000美元，并且需要定期校准。建议的系统不需要定期校准，是必要的稳定测力平台，它是易于使用。在未来，所提出的系统集成度很低，除了作为稳定平台的仿真器之外，还可以用于真实的识别和跟踪头部、腿部、手臂和躯干，即收集由复杂的光电系统实际获得的信息。(C)2014爱思唯尔爱尔兰有限公司版权所有。
Back ground and objective: The degeneration of the balance control system in the elderly and in many pathologies requires measuring the equilibrium conditions very often. In clinical practice, equilibrium control is commonly evaluated by using a force platform (stabilometric platform) in a clinical environment.In this paper, we demonstrate how a simple movement analysis system, based on a 3D video camera and a 3D real time model reconstruction of the human body, can be used to collect information usually recorded by a physical stabilometric platform.Methods: The algorithm used to reconstruct the human body model as a set of spheres is described and discussed. Moreover, experimental measurements and comparisons with data collected by a physical stabilometric platform are also reported. The measurements were collected on a set of 6 healthy subjects to whom a change in equilibrium condition was stimulated by performing an equilibrium task.Results: The experimental results showed that more than 95% of data collected by the proposed method were not significantly different from those collected by the classic platform, thus confirming the usefulness of the proposed system.Conclusions: The proposed virtual balance assessment system can be implemented at low cost (about 500$) and, for this reason, can be considered a home use medical device. On the contrary, astabilometric platform has a cost of about 10,000$ and requires periodical calibration. The proposed system does not require periodical calibration, as is necessary for stabilometric force platforms, and it is easy to use. In future, the proposed system with little integration can be used, besides being an emulator of a stabilometric platform, also to recognize and track, in real time, head, legs, arms and trunk, that is to collect information actually obtained by sophisticated optoelectronic systems. (C) 2014 Elsevier Ireland Ltd. All rights reserved.