Photoablation

摘要

Abstract: There are three principal classes of laser tissue interactions. All three can be used to remove malignant tissue either by biological digestion or immediate removal i.e., photovaporization or photodecomposition. This paper discusses a semiempirical theory of the so-called photoablation process and the thermal side effects of the surrounding tissue. Describing the photoablation process requires differentiation to be made between very short laser pulse durations ($LS$mu@s) i.e., the laser pulse is finished before the ejection of the decomposed tissue material starts, and long-pulse durations in the microsecond time domain where irradiation and ejection become a continuous process. This paper discusses the ablation with very short pulse durations and shows that the photoablation process is a microscale fast thermal explosion.!32