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

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posted on 2023-05-19, 04:13 authored by Bosi, SG, Baldock, C, Smee, R
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.

History

Publication title

Journal of Physics: Conference Series

Volume

250

Pagination

1-5

ISSN

1742-6588

Department/School

Research Services

Publisher

Institute of Physics Publishing Ltd

Place of publication

United Kingdom

Rights statement

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.

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  • Open

Socio-economic Objectives

Other health not elsewhere classified

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