Thermal impact of carbon-dioxide laser with tissue
Description
The primary aim of this study is to understand the general features of thermal impact of carbon dioxide laser with tissue. Because of high water content in tissue one expects that the thermal parameters of water are close to those of tissue. Accordingly, measurements of crater dimensions and temperature distribution in irradiated tissue are compared with values calculated from a theoretical 'water' model of tissue. The thermal parameters of water are found to be similar to those of tissue Few studies of basic carbon dioxide laser interaction with crater effects included have been carried out in the past. In this work crater volume, depth, diameters with different laser power, exposure time have been measured. Temperature history at different positions around crater have been measured and compared with calculated values. We find they are in qualitative agreement. The result may be understood within the framework of energy conservation and heat conduction The measurements are compared with the results of computer modeling of the process. The model cotreats the effect of convection heat loss on surface, the heat conduction percentage, and determines which variables (laser power, exposure time, and spot size) most strongly contribute to the temperature history, maximum temperature, and other features of interest