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Aspects of tumour demarcation in rats by means of laser-induced fluorescence and haematoporphyrin derivatives

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Author

Summary, in English

The effects of different parameters of interest for the localization of malignant tumours in situ by means of laser-induced fluorescence and haematoporphyrin derivatives were investigated. Such parameters are drug composition, drug concentration, laser pulse energy and excitation wavelength. In order to assess the relative merits of the two tumour-seeking agents Photofrin (haematoporphyrin derivative) and Photofrin II (dihaematoporphyrin ether) we have performed a comparative study on rat tissues. The results suggest that Photofrin is at least as good as the therapeutically more potent agent Photofrin II. A linear relation between drug dose and recorded porphyrin fluorescence intensity was also found. Using not only the porphyrin fluorescence, but also natural tissue autofluorescence, better tumour demarcation is observed when utilizing an excitation wavelength shorter than the porphyrin excitation peak at 405 nm.

Publishing year

1988

Language

English

Pages

239-248

Publication/Series

Lasers in Medical Science

Volume

3

Issue

239

Document type

Journal article

Publisher

Springer

Topic

  • Atom and Molecular Physics and Optics

Keywords

  • Autofluorescence
  • Cancer detection
  • Dihaematoporphyrin ether
  • Fluorescence
  • Haematoporphyrin derivative

Status

Published

ISBN/ISSN/Other

  • ISSN: 0268-8921