Calculation of thermal effect in skin-tissue induced by laser
-
1.
Department of Optics & Electron Engineering, Ordnance Engineering College, Shijiazhuang 050003, China;
-
2.
State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments and Mechanology, Tsinghua University, Beijing 100084, China
-
Corresponding author:
NIU Yan-xiong, niuyanxiong@263.net
;
-
Received Date:
2007-06-06
Accepted Date:
2007-07-25
-
Abstract
In order to study near-infrared laser safety problem,the thermal model of biological tissue induced by continuous lasers was set up and the precise expression of transient temperature distribution induced by laser both in irradiation and diffusion process was obtained through discrete variable method.Taking skin tissue irradiated by chemical oxygen-iodine laser as an example,the skin temperature distribution was calculated and analyzed.The calculation showed that temperature increased with the power density and irradiation time,temperature of biological tissue subjected to the surface decreased slowly when the irradiation ended,but the temperature in the deep biological tissue increased at first and then decreased slowly.The analyzing result is in accordance with the relative experimental result,which proves the laser irradiation model correct.The result is helpful to the research of thermal damage induced by continuous laser in material.
-
-
References
|
[1]
|
SU Y,WAN M.High energy laser system[M].Beijing:National De-fence Industry Press,2004:5-9(in Chinese). |
|
[2]
|
LIU L,LI Zh J.Theoretical investigation of opto-thermal transfer in human dentine irradiated by Nd:YAG laser[J].Laser Technology,2006,30(4):373-376(in Chinese). |
|
[3]
|
WEI H J,HE B H,CHEN X M,et al.Pathological changes and thermal coagulation of human liver tissue induced changes in the optical penetration depths in vitro[J].Laser Technology,2007,31(1):31-34(in Chinese). |
|
[4]
|
THOMSEN B S L,THOMAS R J,WELCH A J.Modeling thermal damage in skin from 2000nm laser irradiation[J].Journal of Biomedical Optics,2006,11(6):064028/1-064028/15. |
|
[5]
|
CAIN C P,POLHAMUS G D,ROACH W P,et al.Porcine skin visible lesion thresholds for near-infrared lasers including modeling at two pulse durations and spot sizes[J].Journal of Biomedical Optics,2006,11(4):041109/1-041109/10. |
|
[6]
|
WEI H J,XING D,LU J J,et al.Total attenuation coefficients of human bladder at different lasers measured by using the direct and indirect methods in vitro[J].Laser Technology,2005,29(4):420-422(in Chinese). |
|
[7]
|
NIEMZ M H.Laser-tissue interactions fundamentals and applications[M].Beijing:Science Press,2005:53-61(in Chinese). |
|
[8]
|
YU Ch M.Heat conduction[M].Beijing:Higher Education Press,1984:40-45(in Chinese). |
|
[9]
|
LIU J,WANG C Ch.Heat conduction theory of biological tissue[M].Beijing:Science Press,1997:232-340(in Chinese). |
|
[10]
|
SHEN G P,XIE Sh S.Theoretical analysis and numerical simulation of temperature distribution for laser-irradiated skin tissue[J].Journal of Fujian Teachers University(Natural Science),2002,18(4):26-29(in Chinese). |
-
-
Proportional views
-
Map
DownLoad: