Numerical simulation of changes in the electric properties of biological tissues under local heating by laser radiation

Abstract

The mathematical model that describes the local heating of biological tissues by optical radiation is introduced. Changes of the electric properties of biological tissues in such process can be used as a reliable tool for analyzing heating and damage degrees of tissues.

Radiofrequency impedance monitoring of the biological tissues under local heating by optical radiation

“…An alternative way for the reduction of the contribution of the contact resistance effect can be the application of the four-electrode method. A good agreement between the experimental data and simulation results was also demonstrated (see Figures 9,11,12). However, it is necessary to mention a relatively simplistic nature of the modeling approach.…”

“…The experimental results were compared with the solutions of the direct problem of mathematical modeling based on the equations presented in the paper [11]. Involved electrical and optical properties of investigated tissue samples were measured separately.…”

“…The mathematical 3D model of local heating of biological tissues by laser radiation was developed relying on the equations presented in the paper [11].…”

“…In addition, monitoring of the thermal damage of tissues can be performed using methods based on an ultrasound imaging [10]. Another approach recently proposed in our previous paper [11], suggested measurements of radio frequency (RF) electrical properties of tissues in the process of local optical irradiation.…”