Main problems and new results on dosimetry in laser medicine

Gerhard J. Mueller; Klaus Doerschel; Brita J. Schaldach

doi:10.1117/12.23735

1 September 1990 Main problems and new results on dosimetry in laser medicine

Gerhard J. Mueller, Klaus Doerschel, Brita J. Schaldach

Proceedings Volume 1353, First International Conference on Lasers and Medicine; (1990) https://doi.org/10.1117/12.23735
Event: First International Conference on Lasers and Medicine, 1990, Tashkent, Uzbekistan

Abstract

Lasers as a therapeutic tool have been used in medicine since 1961, but there are only a few papers on Dosimetry1. Considering the question how to measure the effective dose for a given medical procedure it is not sufficient to monitor the laser output precisely as a source of electromagnetic radiation but in addition one has to take into account the optical and thermal properties of human tissue as a target for the impinging laser radiation as well as the biological reaction of living tissue. Fig. 1 shows a sketch of the spectral behaviour of human skin. In the UV, the penetration depth turns out to be nearly zero, the maximum is at 780-800 urn and in the mid JR at 10 m the penetration depth becomes shallow again. The penetration depth for most tissue varies from jm in the Uv and mid JR to about one centimeter in the visible red and near JR region. The differentpenetration depth and the different interaction times from picoseconds to minutes give rise to the various effects of laser tissue interaction2. This is quite different from the situation for ionizing radiation.

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Gerhard J. Mueller, Klaus Doerschel, and Brita J. Schaldach "Main problems and new results on dosimetry in laser medicine", Proc. SPIE 1353, First International Conference on Lasers and Medicine, (1 September 1990); https://doi.org/10.1117/12.23735

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