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Proceedings Paper

Fully distributed chirped FBG sensor and application in laser-induced interstitial thermotherapy
Author(s): Chenglin Li; Na Chen; Zhenyi Chen; Tingyun Wang
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Paper Abstract

In the laser induced interstitial thermotherapy (LITT), real-timely detecting the temperature distribution of the cured tissue is a bottleneck. In this paper, a fully distributed chirped Fiber Bragg grating (FBG) sensor, which is of small size, immune from electromagnetic interference (EMI) and high sensitivity, is proposed to solve this problem. An experiment simulation of LITT is set up, and only one chirped FBG is used to detect the dynamic spectral variation with different laser power. Meanwhile, a high-efficiency spectra inversion algorithm named MSAE of FBG is utilized to demodulate the system and obtain the temperature distribution. The spatial resolution is 0.25mm and the running time of demodulation is tens of seconds, which can help doctors control the laser parameters such as the laser power and the treatment time to guarantee the security of the therapy.

Paper Details

Date Published: 25 November 2009
PDF: 6 pages
Proc. SPIE 7634, Optical Sensors and Biophotonics, 76340D (25 November 2009); doi: 10.1117/12.852040
Show Author Affiliations
Chenglin Li, Shanghai Univ. (China)
Na Chen, Shanghai Univ. (China)
Zhenyi Chen, Shanghai Univ. (China)
Tingyun Wang, Shanghai Univ. (China)


Published in SPIE Proceedings Vol. 7634:
Optical Sensors and Biophotonics

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