Analysis of the theory of thermal damage in biological tissues caused by Laser beam

Document Type: Conference Proceedings

Author

Department of Physics, Payame Noor University, Tehran, Iran

Abstract

Introduction: In laser surgery, the laser beam can evaporate and cut the tissue like a small surgical knife when the tissue temperature is heated to 100 degrees Celsius. a complete understanding of the distribution of damage in both pathologic tissue and surrounding tissue is necessary. Although the test is the most realistic solution for treating medical problems, for this reason, theoretical investigation of thermal damage in laser tissue is used as an alternative method.
 
Materials and Methods: The diffusion of laser light in the tissue is initially solved using a robust seven-fluid model in the cylindrical coordinate system. The spatial distribution of the absorbed laser energy is introduced into the environmental transfer equation to solve the temperature response. Heat damage to tissues is determined according to the amount of dental protein by using the equation of the rate process.
 
Results: Heat damage to tissues is determined according to the amount of dental protein by using the equation of the rate process. It has been found that significant protein denaturation can occur when the temperature is over 53 ° C.
Conclusion: When a tissue radiates with a continuous laser beam with constant power in time, the damage parameter is also stored even after the laser is shut down. The most serious tissue damage occurs after laser radiation, when the temperature is about 53 ° C.

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