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Journal of Biomedical Optics

Respiratory function monitoring using a real-time three-dimensional fiber-optic shaping sensing scheme based upon fiber Bragg gratings
Author(s): Thomas D. P. Allsop; Ranjeet Bhamber; Glynn D. Lloyd; Martin R. Miller; Andrew Dixon; David J. Webb; Juan Diego Ania-Castañon; Ian Bennion
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Paper Abstract

An array of in-line curvature sensors on a garment is used to monitor the thoracic and abdominal movements of a human during respiration. The results are used to obtain volumetric changes of the human torso in agreement with a spirometer used simultaneously at the mouth. The array of 40 in-line fiber Bragg gratings is used to produce 20 curvature sensors at different locations, each sensor consisting of two fiber Bragg gratings. The 20 curvature sensors and adjoining fiber are encapsulated into a low-temperature-cured synthetic silicone. The sensors are wavelength interrogated by a commercially available system from Moog Insensys, and the wavelength changes are calibrated to recover curvature. A three-dimensional algorithm is used to generate shape changes during respiration that allow the measurement of absolute volume changes at various sections of the torso. It is shown that the sensing scheme yields a volumetric error of 6%. Comparing the volume data obtained from the spirometer with the volume estimated with the synchronous data from the shape-sensing array yielded a correlation value 0.86 with a Pearson's correlation coefficient p<0.01.

Paper Details

Date Published: 1 November 2012
PDF: 10 pages
J. Biomed. Opt. 17(11) 117001 doi: 10.1117/1.JBO.17.11.117001
Published in: Journal of Biomedical Optics Volume 17, Issue 11
Show Author Affiliations
Thomas D. P. Allsop, Aston Univ. (United Kingdom)
Ranjeet Bhamber, Instituto de Òptica (Spain)
Glynn D. Lloyd, Moog Insensys Ltd. (United Kingdom)
Martin R. Miller, Univ. of Birmingham (United Kingdom)
Andrew Dixon, Umeco Process Material Ltd. (United Kingdom)
David J. Webb, Aston Univ. (United Kingdom)
Juan Diego Ania-Castañon, Instituto de Òptica (Spain)
Ian Bennion, Aston Univ. (United Kingdom)

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