A Method for Measurement of Water Temperature in Micro-Region Using Near Infrared Light

Author

Kakuta, N. ; Li, F. ; Yamada, Y.

Author_Institution

Dept. of Mechanical Eng. & Intelligent Syst., Univ. Electro-Communications, Chofu

fYear

2005

fDate

6/27/1905 12:00:00 AM

Firstpage

3145

Lastpage

3148

Abstract

We have proposed a method for non-invasively measuring the temperature changes of water in a micro-region using near infrared (NIR) light. The goal of this study is to measure the temperature changes of biological cells or tissues. This method is on the basis of the phenomenon that the NIR absorption spectrum of water depends on temperature. First, in order to confirm whether a right irradiation for the temperature measurement itself affects the water temperature, we calculated the temperature rise caused by the optical absorption. Next, absorbance spectra in the wavelength range of 1300 - 2000 nm of water with a thickness of 100 and 500 mum were measured by a micro-spectrometer. The measured spectra with temperature-dependence were calibrated using a regression analysis. The standard error of calibration was 0.6degC for 100 mum-thickness

Keywords

bio-optics; biomedical measurement; biothermics; calibration; infrared spectra; light absorption; regression analysis; 100 to 500 mum; 1300 to 2000 nm; NIR absorption spectrum; absorbance spectra; biological cells; biological tissues; calibration; microregion; microspectrometer; near infrared light; optical absorption; regression analysis; water temperature changes; Biological cells; Biological tissues; Biomedical optical imaging; Calibration; Electromagnetic wave absorption; Regression analysis; Temperature dependence; Temperature measurement; Thickness measurement; Wavelength measurement; Temperature; absorption spectrum; microscopy; near-infrared (NIR); water;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 2005. IEEE-EMBS 2005. 27th Annual International Conference of the

Conference_Location

Shanghai

Print_ISBN

0-7803-8741-4

Type

conf

DOI

10.1109/IEMBS.2005.1617142

Filename

1617142