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Proceedings Paper

Pulsed photothermal radiometry of port-wine stains
Author(s): Thomas E. Milner; J. Stuart Nelson; N. Q. Tran; Abraham Katzir; Lars Othar Svaasand; Steven L. Jacques
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Paper Abstract

The application of pulsed photothermal radiometry (PPTR) diagnostics to characterize port wine stain (PWS) lesions is discussed. Influence of epidermal absorbance and PWS depth on the PPTR signal is analyzed using an in-vitro model of PWS skin consisting of multilayered collagen films. An instrument is constructed and used for patient and animal model PPTR measurements. When an infrared fiber is incorporated, the instrumentation facilitates convenient skin-site accessibility. Modulation of the PPTR signal and homodyne detection substantially improve the system signal-to-noise ratio over previous methods. Given the measured PPTR signal, an algorithm computes the initial temperature distribution in the PWS skin immediately after the laser pulse. The use and limitations of the algorithm are presented and discussed.

Paper Details

Date Published: 7 July 1993
PDF: 9 pages
Proc. SPIE 1882, Laser-Tissue Interaction IV, (7 July 1993); doi: 10.1117/12.147677
Show Author Affiliations
Thomas E. Milner, Beckman Laser Institute and Medical Clinic (United States)
J. Stuart Nelson, Beckman Laser Institute and Medical Clinic (United States)
N. Q. Tran, Beckman Laser Institute and Medical Clinic (United States)
Abraham Katzir, Tel Aviv Univ. (Israel)
Lars Othar Svaasand, Univ. of Trondheim (Norway)
Steven L. Jacques, Univ. of Texas M.D. Anderson Cancer Ctr. (United States)

Published in SPIE Proceedings Vol. 1882:
Laser-Tissue Interaction IV
Steven L. Jacques; Abraham Katzir, Editor(s)

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