Stephen Bosi et al 2007 Phys. Med. Biol. 52 2893 doi:10.1088/0031-9155/52/10/017
Initial investigation of a novel light-scattering gel phantom for evaluation of optical CT scanners for radiotherapy gel dosimetry
Stephen Bosi1, Pourandokht Naseri1, Alicia Puran1, Justin Davies1,2 and Clive Baldock1
Show affiliationsThere is a need for stable gel materials for phantoms used to validate optical computerized tomography (CT) scanners used in conjunction with radiation-induced polymerizing gel dosimeters. Phantoms based on addition of light-absorbing dyes to gelatine to simulate gel dosimeters have been employed. However, to more accurately simulate polymerizing gels one requires phantoms that employ light-scattering colloidal suspensions added to the gel. In this paper, we present the initial results of using an optical CT scanner to evaluate a novel phantom in which radiation-exposed polymer gels are simulated by the addition of colloidal suspensions of varying turbidity. The phantom may be useful as a calibration transfer standard for polymer gel dosimeters. The tests reveal some phenomena peculiar to light-scattering gels that need to be taken into account when calibrating polymer gel dosimeters.
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Issue 10 (21 May 2007)
Received 14 November 2006, in final form 8 March 2007
Published 1 May 2007
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Initial investigation of a novel light-scattering gel phantom for evaluation of optical CT scanners for radiotherapy gel dosimetry
Stephen Bosi et al 2007 Phys. Med. Biol. 52 2893
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