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Near‐infrared photo‐excited emission from tissues treated at different temperature levels
Author(s) -
Tang Jing,
Zhang Gang,
Zeng Fanan,
Ho Ping Pei,
Alfano R. R.
Publication year - 2001
Publication title -
lasers in surgery and medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.888
H-Index - 112
eISSN - 1096-9101
pISSN - 0196-8092
DOI - 10.1002/lsm.1080
Subject(s) - intensity (physics) , emission intensity , infrared , excited state , radiant intensity , laser , materials science , analytical chemistry (journal) , muscle tissue , chemistry , optics , optoelectronics , luminescence , atomic physics , anatomy , medicine , radiation , chromatography , physics
Background and Objective There is a lack of methods to evaluate the extent of thermal treatment of biological tissue. The intensity of the near‐infrared (NIR) emission photo‐excitation was investigated from tissue undergoing different levels of heat treatment. Study Design/Materials and Methods Chicken muscle was heated in an oven at different temperature levels ranging from 40°C until burn‐off. The spectral emission intensity from these heat‐treated tissues was measured with a CCD camera and the intensity was calculated. Results The emission intensity increased proportionally with respect to the extent of treatment temperature until burning. Linear relationships between treatment temperature and the emission intensity from tissue samples were found in three temperature ranges: from 40 to 160°C, from 165 to 220°C, and from 225 to 250°C. Conclusions The change in tissue damage after heat treatment could be detected by measuring the NIR emission intensity from the thermally damaged tissues. Lasers Surg. Med. 29:18–22, 2001. © 2001 Wiley‐Liss, Inc.