Einführung in die gewebeoptik und optische dosimetrie

Translated title of the contribution: Introduction to tissue optics and optical dosimetry

J. Eichler, Beop-Min Kim

Research output: Contribution to journalArticle

Abstract

The spatial distribution of radiation during medical laser application is determined by the characteristics of the beam (power, time, beam geometry) and the optical properties of the tissue. The irradiance E (in W/m2) describes the primary laser beam. Scattered radiation, in turn, is taken into account by the fluence rate φ (also in W/m2). The basic parameters of tissue optics are the absorption coefficient μa, the scattering coefficient μs and the anisotropy factor g. In addition, derived parameters are also used, i. e., total attenuation coefficient μt, reduced scattering coefficient μs′, effective attenuation coefficient μeff, mean free path of a photon d and penetration depth δ. Further tissue properties are the diffuse reflectance Rd and the back-scattering factor k. In an one-dimensional model the fluence rate φ in tissue is a nearly exponential function characterized by the penetration depth δ. At the tissue surface, the relationship exists φ=kE. This model is compared with the results of a computer program based on the finite element method.

Original languageGerman
Pages (from-to)195-200
Number of pages6
JournalZeitschrift fur Medizinische Physik
Volume11
Issue number3
Publication statusPublished - 2001 Oct 16
Externally publishedYes

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Lasers
Radiation
Anisotropy
Photons
Software

Keywords

  • Laser medicine
  • Optical dosimetry
  • Optics
  • Tissue

ASJC Scopus subject areas

  • Biophysics

Cite this

Einführung in die gewebeoptik und optische dosimetrie. / Eichler, J.; Kim, Beop-Min.

In: Zeitschrift fur Medizinische Physik, Vol. 11, No. 3, 16.10.2001, p. 195-200.

Research output: Contribution to journalArticle

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