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

Stephen G. Bosi, Pourandokht Naseri, Clive Baldock

Research output: Contribution to journalArticle

14 Citations (Scopus)
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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.
Original languageEnglish
Pages (from-to)2427-2434
Number of pages8
JournalApplied Optics
Volume48
Issue number13
DOIs
Publication statusPublished - 2009
Externally publishedYes

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