Dfine thermal tissue
Answers
Answer:
As it was emphasized in the previous review article1, lasers are widely used in biology and medicine and the majority of the hospitals utilize modern laser systems for diagnostic and therapeutic applications. The medical laser applications are defined by the type of interaction between laser light and tissues. Knowledge of laser-tissue interaction can help doctors or surgeons to select the optimal laser systems and to modify the type of their therapy1-3. Therefore, we seek to review the mechanisms of laser- tissue interaction. In reference number 1, the optical properties of biological tissue such as absorption, scattering, penetration and fluorescence have been reviewed1. In this paper, we intend to study the thermal properties of the biological tissues. During all medical applications based on heating such as hair removal, cancer therapy or laser-induced interstitial thermotherapy (LITT), it is desirable to have a complete knowledge of temperature distribution in the tissue. Study of this temperature distribution requires knowledge about the thermal properties of biological tissues. The transportation of thermal energy in biological tissues is a complicated procedure including different phenomenological mechanisms such as thermal conduction, convection, radiation, metabolic activities and phase change2. If a biological tissue is illuminated by a laser light such as Neodymium-Doped Yttrium Aluminium Garnet (Nd:YAG) or Carbon Dioxide (CO2) laser, one can see multiple effects like coagulation, vaporization, carbonization or melting. These effects depend on the peak power and wavelength of the laser as well as the thermal properties of biological tissues
Answer:
Tissue that form the outer covering of the plant body is called DERMAL TISSUE.