激光多普勒测速法：光纤移动伪影问题

Laser Doppler velocimetry: the problem of fibre movement artefact.

作者信息

Newson T P, Obeid A, Wolton R S, Boggett D, Rolfe P

出版信息

J Biomed Eng. 1987 Apr;9(2):169-72. doi: 10.1016/0141-5425(87)90030-6.

Abstract

The problem of fibre movement artefact in laser Doppler velocimetry recordings of skin blood flow has been investigated. Beat frequency spectra were obtained for a stationary target, unheated skin, heated skin (43.5 degrees C), with and without blood flow occluded for various induced amounts of fibre movement. Possible methods for either eliminating, or obtaining an indicator of, fibre movement artefact were considered. The solution proposed is to incorporate additional fibres terminating within the transducer to permit an index of fibre movement to be obtained that is independent of blood flow.

摘要

对激光多普勒血流仪记录皮肤血流时的光纤移动伪像问题进行了研究。针对静止目标、未加热皮肤、加热皮肤（43.5摄氏度），在不同诱导光纤移动量的情况下，分别在有和没有血流阻断的条件下获取了拍频光谱。考虑了消除光纤移动伪像或获取其指标的可能方法。所提出的解决方案是在换能器内纳入额外的光纤终端，以便获得一个与血流无关的光纤移动指标。