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Title: Heat Transfer in Laser Tumor Excision
Authors: Chen, Alan
Cheung, Edwin
Lee, Steven
Picuri, John
Shih, Tsung Li
Keywords: heat transfer, laser, tumor,
Issue Date: 13-Jul-2004
Series/Report no.: 2004;6
Abstract: Cancer is an ongoing disease that is present in a majority of the population. Laser surgery provides minimally invasive techniques to excise tumors in humans. This method allows quicker recoveries and fewer complications. This study analyzes the effectiveness of excision of tumor tissue using a CO2 laser. By using computer aided design and finite element analysis, we model a cylindrical tumor tissue with 0.3cm in diameter and height. A flux of 282mmW from the laser and a convection coefficient of KmmW???26105 were applied when designing this model. Our results produced temperature contour plots at several time intervals, all showing precise laser excision with minimal inadvertent tissue damage (less than 0.006 mm in depth after excising approximately 0.15 mm of tissue in depth). Sensitivity analysis indicate that changes in material properties such as conductivity, convection, specific heat, density, and laser power have minimal affects on the temperature profile.
Appears in Collections:BEE 4530 - 2004 Student Papers

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