On the use of positron counting for radio-assay in nuclear pharmaceutical production

Maneuski, D. , Giacomelli, F., Lemaire, C., Pimlott, S. , Plenevaux, A., Owens, J., O'Shea, V. and Luxen, A. (2017) On the use of positron counting for radio-assay in nuclear pharmaceutical production. Applied Radiation and Isotopes, 125, pp. 9-14. (doi: 10.1016/j.apradiso.2017.03.021) (PMID:28390998)

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Abstract

Current techniques for the measurement of radioactivity at various points during PET radiopharmaceutical production and R&D are based on the detection of the annihilation gamma rays from the radionuclide in the labelled compound. The detection systems to measure these gamma rays are usually variations of NaI or CsF scintillation based systems requiring costly and heavy lead shielding to reduce background noise. These detectors inherently suffer from low detection efficiency, high background noise and very poor linearity. They are also unable to provide any reasonably useful position information. A novel positron counting technique is proposed for the radioactivity assay during radiopharmaceutical manufacturing that overcomes these limitations. Detection of positrons instead of gammas offers an unprecedented level of position resolution of the radiation source (down to sub-mm) thanks to the nature of the positron interaction with matter. Counting capability instead of charge integration in the detector brings the sensitivity down to the statistical limits at the same time as offering very high dynamic range and linearity from zero to any arbitrarily high activity. This paper reports on a quantitative comparison between conventional detector systems and the proposed positron counting detector.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:O'Shea, Professor Val and Maneuski, Dr Dima and Pimlott, Dr Sally
Authors: Maneuski, D., Giacomelli, F., Lemaire, C., Pimlott, S., Plenevaux, A., Owens, J., O'Shea, V., and Luxen, A.
College/School:College of Medical Veterinary and Life Sciences > School of Medicine, Dentistry & Nursing
College of Science and Engineering > School of Physics and Astronomy
Journal Name:Applied Radiation and Isotopes
Publisher:Elsevier
ISSN:0969-8043
ISSN (Online):1872-9800
Published Online:24 March 2017
Copyright Holders:Copyright © 2017 The Authors
First Published:First published in Applied Radiation and Isotopes 125:9-14
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
600011Experimental Particle PhysicsAnthony DoyleScience & Technologies Facilities Council (STFC)ST/K001205/1P&A - PHYSICS & ASTRONOMY