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Proceedings Paper

Clinical use of pulsed photothermal radiometry
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. A PPTR signal of a PWS in response to pulsed laser exposure is shown to consist of an initial `T-jump' due to epidermal melanin absorption and a `delayed thermal wave' resulting from laser generated heat in subsurface blood vessels diffusing to the skin surface. A prototype PPTR instrument incorporating an infrared fiber is constructed which facilitates convenient skin-site accessibility. Laser heating of the infrared collection optics results in an artifactual signal which overestimates the initial `T-jump.' Magnitude of the error is measured and a method to eliminate it is suggested.

Paper Details

Date Published: 1 July 1993
PDF: 7 pages
Proc. SPIE 1876, Lasers in Otolaryngology, Dermatology, and Tissue Welding, (1 July 1993); doi: 10.1117/12.147019
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. 1876:
Lasers in Otolaryngology, Dermatology, and Tissue Welding
R. Rox Anderson; Lawrence S. Bass; Stanley M. Shapshay; John V. White; Rodney A. White, Editor(s)

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