Numerical research of two-dimension temperature distribution in bio-tissue induced by pulse laser and continuum laser based on FEM

Ning Shan; Renjun Zhan; Heping Cui

doi:10.1117/12.2032018

17 September 2013 Numerical research of two-dimension temperature distribution in bio-tissue induced by pulse laser and continuum laser based on FEM

Ning Shan, Renjun Zhan, Heping Cui

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Proceedings Volume 8904, International Symposium on Photoelectronic Detection and Imaging 2013: High Power Lasers and Applications; 89040A (2013) https://doi.org/10.1117/12.2032018
Event: ISPDI 2013 - Fifth International Symposium on Photoelectronic Detection and Imaging, 2013, Beijing, China

Abstract

Laser has several advantages, such as strong anti-interference ability, quick speed, high power, agility and precision. It is widely applied in military and medicine fields. When laser acts on human body, biological tissue of human body will appear the phenomenon of ablation and carbonization and solidification. In order to effectively defend excess damage by laser, the thermal effect research of skin tissue should be carried out. The heating rate and thermal damage area should be studied. In the paper, thermal energy production and thermal exchange loss used in living tissue is analyzed. The rule of thermal transfer that is irradiated by high power laser is discussed. The model of two dimensional skin tissues is built. The two dimensional transient temperature distribution generated by laser irradiation in bio-tissue is numerical simulated using finite element method. The temperature change trend generated by pulse laser and continuum laser in different radial length and axial depth bio-tissue are studied respectively. The results show that FEM method can reflect the photothermal conversion of bio-tissue exactly. Temperature is the highest in the local tissue by laser irradiated directly. The highest temperature decreases along with increasing radial length and axial depth. The highest temperature rise generated by pulse laser is more than continuum laser’s. The highest temperature generated by pulse laser is not monotone increasing but is oscillation trend. The highest temperature generated by continuum laser is monotone increasing. The temperature rise mainly occurs in exodermis and derma. The temperature rise is not very significant in fat acid lining.

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Ning Shan, Renjun Zhan, and Heping Cui "Numerical research of two-dimension temperature distribution in bio-tissue induced by pulse laser and continuum laser based on FEM", Proc. SPIE 8904, International Symposium on Photoelectronic Detection and Imaging 2013: High Power Lasers and Applications, 89040A (17 September 2013); https://doi.org/10.1117/12.2032018

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KEYWORDS

Laser tissue interaction

Skin

Pulsed laser operation

Tissues

Finite element methods

Temperature metrology

Laser irradiation

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