Dr. Hasan Kar Profile

Dr. Hasan Kar

Consultant at VDI Technologiezentrum GmbH

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Proceedings Article | 1 March 1992 Paper

Tissue photoablation process with short-pulsed lasers

Gerhard Mueller, Klaus Doerschel, Hasan Kar

Proceedings Volume 1524, (1992) https://doi.org/10.1117/12.57727

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Since Hippocrates, physicians have three weapons to fight malignant diseases of the human body: Quae medicamenta non sanat, ferrum sanat; quae ferrum non sanat, ignis sanat; and quae vero ignis non sanat, insanabilia reputari oportet. Today there are various possibilities to use the ''fire'': electrical and optical cauterization; mono- and bipolar rf-surgery; ionizing radiation for tumor treatment; and last but not least, the laser of laser tissue interactions, all can be used to remove malignant tissue either by biological digestion or immediate ablation, i.e., photovaporization or photodecomposition. This paper will discuss a semiempirical theory of the so-called photoablation process and the thermal side effects of the surrounding tissue. The term ''Photoablation; has to be well differentiated with the terms photovaporization, photodisruption and photofragmentation. As will be shown in this paper, photoablation is a microscale fast thermal explosion.

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