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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 13 — May. 1, 2009
  • pp: 2427–2434

Light-scattering-induced artifacts in a complex polymer gel dosimetry phantom

Stephen G. Bosi, Pourandokht Naseri, and Clive Baldock  »View Author Affiliations


Applied Optics, Vol. 48, Issue 13, pp. 2427-2434 (2009)
http://dx.doi.org/10.1364/AO.48.002427


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Abstract

Certain polymer gels become turbid on exposure to ionizing radiation, a property exploited in medical dosimetry to produce three-dimensional dose maps for radiotherapy. These maps can be read using optical computed tomography (CT). A test phantom of complex shape (“layered tube”) was developed to investigate the optical properties of polymer gel dosimeters when read using optical CT. Extinction coefficient profiles from tomographically reconstructed slices of the phantom exhibited several artifacts. A simple model invoking scattered light in the gel was able to account for all artifacts, which in a real dosimeter may have been mistaken for other phenomena, resulting in incorrect readings of dose.

© 2009 Optical Society of America

OCIS Codes
(120.3890) Instrumentation, measurement, and metrology : Medical optics instrumentation
(170.6960) Medical optics and biotechnology : Tomography
(290.2648) Scattering : Stray light

ToC Category:
Medical Optics and Biotechnology

History
Original Manuscript: November 21, 2008
Manuscript Accepted: February 24, 2009
Published: April 22, 2009

Virtual Issues
Vol. 4, Iss. 7 Virtual Journal for Biomedical Optics

Citation
Stephen G. Bosi, Pourandokht Naseri, and Clive Baldock, "Light-scattering-induced artifacts in a complex polymer gel dosimetry phantom," Appl. Opt. 48, 2427-2434 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-13-2427


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