Optical Devices Used To Measure Chest Wall Motion

A variety of optical techniques using lasers or small lamps and multiple video cameras can track the three-dimensional position of numerous points on the torso with high precision and temporal resolution. Optical reflectance motion analysis is one of these methods (18).


These techniques can measure displacements accurately for estimation of lung volume change and can provide detailed kinematic data for chest wall mechanics (see below). They are excellent for studying distortion of the chest wall.


Like other techniques described above, optical techniques are subject to artifacts from soft tissue movement. Most optical techniques are expensive and time-consuming, so they have been limited to research.

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