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Journal of Biomedical Optics

Color structured light system of chest wall motion measurement for respiratory volume evaluation
Author(s): Huijun Chen; Yuan Cheng; Dongdong Liu; Xiaodong Zhang; Jue Zhang; Chengli Que; Guangfa Wang; Jing Fang
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Paper Abstract

We present a structured light system to dynamically measure human chest wall motion for respiratory volume estimation. Based on a projection of an encoded color pattern and a few active markers attached to the trunk, respiratory volumes are obtained by evaluating the 3-D topographic changes of the chest wall in an anatomically consistent measuring region during respiration. Three measuring setups are established: a single-sided illuminating-recording setup for standing posture, an inclined single-sided setup for supine posture, and a double-sided setup for standing posture. Results are compared with the pneumotachography and show good agreement in volume estimations [correlation coefficient: R>0.99 (P<0.001) for all setups]. The isovolume tests present small variations of the obtained volume during the isovolume maneuver (standard deviation<0.085 L for all setups). After validation by the isovolume test, an investigation of a patient with pleural effusion using the proposed method shows pulmonary functional differences between the diseased and the contralateral sides of the thorax, and subsequent improvement of this imbalance after drainage. These results demonstrate the proposed optical method is capable of not only whole respiratory volume evaluation with high accuracy, but also regional pulmonary function assessment in different chest wall behaviors, with the advantage of whole-field measurement.

Paper Details

Date Published: 1 March 2010
PDF: 9 pages
J. Biomed. Opt. 15(2) 026013 doi: 10.1117/1.3368680
Published in: Journal of Biomedical Optics Volume 15, Issue 2
Show Author Affiliations
Huijun Chen, Peking Univ. (China)
Yuan Cheng, Peking Univ. First Hospital (China)
Dongdong Liu, Peking Univ. (China)
Xiaodong Zhang, Peking Univ. (China)
Jue Zhang, Peking Univ. (China)
Chengli Que, Peking Univ. First Hospital (China)
Guangfa Wang, Peking Univ. First Hospital (China)
Jing Fang, Peking Univ. (China)

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