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The "push-pull" dosimeter: When two pigments are better than one


Bosi, SG and Baldock, C and Smee, R, The "push-pull" dosimeter: When two pigments are better than one, Journal of Physics: Conference Series, 250, (1) pp. 1-5. ISSN 1742-6588 (2010) [Refereed Article]


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Copyright 2010 IOP Publishing. Published under licence in Journal of Physics: Conference Series by IOP Publishing Ltd.Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

DOI: doi:10.1088/1742-6596/250/1/012010


A new kind of gel dosimeter (the "push-pull" dosimeter) is proposed which would contain two spectrally complementary pigments, one which darkens with increasing dose and another which bleaches. The bleaching pigment would be optimised for high sensitivity and the darkening pigment for low sensitivity. By employing dual pigments optimised independently, the usual requisite compromises between sensitivity at low dose and accuracy at high dose would be relaxed. Such a gel, after exposure would be read using two successive optical CT scans employing two different scan wavelengths. The use of dual pigments could also reduce the occurrence of regions of high optical attenuation which generate artefacts in optical CT. This paper also presents results of simulations of the behaviour of such a gel when scanned using optical cone beam CT.

Item Details

Item Type:Refereed Article
Keywords:gel dosimeter, optical attenuation, computerized tomography
Research Division:Physical Sciences
Research Group:Medical and biological physics
Research Field:Medical physics
Objective Division:Health
Objective Group:Other health
Objective Field:Other health not elsewhere classified
UTAS Author:Baldock, C (Professor Clive Baldock)
ID Code:116147
Year Published:2010
Deposited By:Strategic Research Funding
Deposited On:2017-05-02
Last Modified:2017-09-25
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