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Proceedings Paper

Photothermal modulation of x-ray phase contrast images
Author(s): Christopher M. Laperle; Guohua Cao; Theron J. Hamilton; Christoph Rose-Petruck; Gerald J. Diebold
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Paper Abstract

The in-line x-ray phase-contrast imaging method relies on changes in index of refraction within a body to produce image contrast. In soft tissue, index of refraction variations arise from density changes so that phase contrast imaging provides a map of density gradients within a body. An intense, short pulse laser beam that is differentially absorbed by an object within a body will produce a thermal wave with an associated density change that propagates outwardly from the interface between the object and the body. Experiments are described where a pulsed Nd:YLF laser is synchronized to an image intensifier to record the effects of the energy deposited by a pulsed laser.

Paper Details

Date Published: 13 February 2007
PDF: 5 pages
Proc. SPIE 6437, Photons Plus Ultrasound: Imaging and Sensing 2007: The Eighth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics, 64371N (13 February 2007); doi: 10.1117/12.729196
Show Author Affiliations
Christopher M. Laperle, Brown Univ. (United States)
Guohua Cao, Brown Univ. (United States)
Theron J. Hamilton, Brown Univ. (United States)
Christoph Rose-Petruck, Brown Univ. (United States)
Gerald J. Diebold, Brown Univ. (United States)


Published in SPIE Proceedings Vol. 6437:
Photons Plus Ultrasound: Imaging and Sensing 2007: The Eighth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics
Alexander A. Oraevsky; Lihong V. Wang, Editor(s)

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