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Proceedings Paper

Evaluation of scattered light distributions of cw-transillumination for functional diagnostic of rheumatic disorders in interphalangeal joints
Author(s): Viravuth Prapavat; Rijk Schuetz; Wolfram Runge; Juergen Beuthan; Gerhard J. Mueller
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Paper Abstract

This paper presents in-vitro-studies using the scattered intensity distribution obtained by cw- transillumination to examine the condition of rheumatic disorders of interphalangeal joints. Inflammation of joints, due to rheumatic diseases, leads to changes in the synovial membrane, synovia composition and content, and anatomic geometrical variations. Measurements have shown that these rheumatic induced inflammation processes result in a variation in optical properties of joint systems. With a scanning system the interphalangeal joint is transilluminated with diode lasers (670 nm, 905 nm) perpendicular to the joint cavity. The detection of the entire distribution of the transmitted radiation intensity was performed with a CCD camera. As a function of the structure and optical properties of the transilluminated volume we achieved distributions of scattered radiation which show characteristic variations in intensity and shape. Using signal and image processing procedures we evaluated the measured scattered distributions regarding their information weight, shape and scale features. Mathematical methods were used to find classification criteria to determine variations of the joint condition.

Paper Details

Date Published: 18 December 1995
PDF: 9 pages
Proc. SPIE 2626, Photon Propagation in Tissues, (18 December 1995); doi: 10.1117/12.228656
Show Author Affiliations
Viravuth Prapavat, Univ. Hospital Benjamin Franklin (Germany)
Rijk Schuetz, Laser- und Medizin-Technologie gGmbH (Germany)
Wolfram Runge, Univ. Hospital Benjamin Franklin (Germany)
Juergen Beuthan, Univ. Hospital Benjamin Franklin (Germany)
Gerhard J. Mueller, Univ. Hospital Benjamin Franklin and Laser- und Medizin-Technologie gGmbH (Germany)

Published in SPIE Proceedings Vol. 2626:
Photon Propagation in Tissues
Britton Chance; David T. Delpy; Gerhard J. Mueller, Editor(s)

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