Standardisation of 18F by a coincidence method using full solid angle detectors.

Details

Serval ID
serval:BIB_38407AE94E0E
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Standardisation of 18F by a coincidence method using full solid angle detectors.
Journal
Applied Radiation and Isotopes
Author(s)
Nedjadi Y., Bailat C., Caffari Y., Bochud F.
ISSN
1872-9800 (Electronic)
ISSN-L
0969-8043
Publication state
Published
Issued date
2010
Volume
68
Number
7-8
Pages
1309-1313
Language
english
Notes
Publication types: Journal Article
Publication Status: ppublish
Abstract
A solution of (18)F was standardised with a 4pibeta-4pigamma coincidence counting system in which the beta detector is a one-inch diameter cylindrical UPS89 plastic scintillator, positioned at the bottom of a well-type 5''x5'' NaI(Tl) gamma-ray detector. Almost full detection efficiency-which was varied downwards electronically-was achieved in the beta-channel. Aliquots of this (18)F solution were also measured using 4pigamma NaI(Tl) integral counting and Monte Carlo calculated efficiencies as well as the CIEMAT-NIST method. Secondary measurements of the same solution were also performed with an IG11 ionisation chamber whose equivalent activity is traceable to the Système International de Référence through the contribution IRA-METAS made to it in 2001; IRA's degree of equivalence was found to be close to the key comparison reference value (KCRV). The (18)F activity predicted by this coincidence system agrees closely with the ionisation chamber measurement and is compatible within one standard deviation of the other primary measurements. This work demonstrates that our new coincidence system can standardise short-lived radionuclides used in nuclear medicine.
Keywords
Fluorine Radioisotopes/standards, Methods, Nuclear Medicine/methods, Reference Standards, Scintillation Counting/instrumentation, Scintillation Counting/methods
Pubmed
Web of science
Create date
02/09/2011 18:10
Last modification date
20/08/2019 13:27
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