Ultrasonic measurement of postural stability and control

Proceedings of Computer Based Medical Systems Pub Date : 1997-03-11 DOI:10.1109/CBMS.1997.596427

S. Badjou, G. Powers, M. Tanas

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引用次数: 2

Abstract

The study of postural sway is of special interest because of its applications in clinical medicine. Currently, the most accurate device used to study postural sway is the force platform. It is however costly and nonportable. The authors introduce an alternative system that consists of a computer-interfaced ultrasonic device. Ultrasound is emitted by sonar and bounces back from the subject's body. The amplitude of motion of the center of gravity is calculated and displayed graphically in real time. They, and several researchers, have determined that the mean speed of sway is a parameter that could be used to quantify postural sway. They developed software to filter system noise and calculate the mean speed of sway accurately. They tested the sensitivity and reliability by performing measurements of a fixed distance, and of the anterior-posterior and medical-lateral sways of thirty young healthy subjects, 15 males and 15 females. The error on the mean speed of sway was found to be less than 1%. This is no less accurate than the best sway instruments they know of. The results are consistent with force-platform measurements, and demonstrate the reliability of the system, as a means to study accurately postural control.

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超声波测量的姿势稳定性和控制

体位摇摆的研究因其在临床医学中的应用而受到特别关注。目前，用于研究体位摇摆最精确的装置是力台。然而，它是昂贵的和不可携带的。作者介绍了一种由计算机接口超声装置组成的替代系统。超声波是由声纳发射的，并从被测者的身体反射回来。计算了重心的运动幅度，并以图形方式实时显示。他们和几位研究人员已经确定，平均摇摆速度是一个可以用来量化姿势摇摆的参数。他们开发了软件来过滤系统噪声并精确计算平均摇摆速度。他们对30名年轻健康受试者(15名男性和15名女性)进行了固定距离的测量，并测量了前后摆动和医学侧向摆动，从而测试了这种方法的灵敏度和可靠性。平均摇摆速度误差小于1%。这不比他们所知道的最好的摇摆仪器差。结果与力平台测量结果一致，证明了该系统的可靠性，可作为研究精确姿态控制的手段。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of Computer Based Medical Systems

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