Calibration of pre-cut iridium-192 wires for low dose rate interstitial brachytherapy using a Farmer-type ionization chamber.

2.50
Hdl Handle:
http://hdl.handle.net/10541/85436
Title:
Calibration of pre-cut iridium-192 wires for low dose rate interstitial brachytherapy using a Farmer-type ionization chamber.
Authors:
Vollans, S E; Wilkinson, James M
Abstract:
A technique, originally developed for calibrating small low activity caesium sources, which uses a Farmer-type ionization chamber, has been further developed for use with iridium wires. Correction factors have been generated to account for the finite source and detector sizes, and attenuation in the source carriers. The air kerma calibration factor for heavily filtered 280 kV X-rays was used for reference back to the National Standard. The results of this calibration method have been compared with the calibration figures given by the manufacturers over a 5 year period for the emissions from 50 batches of wires of varying strengths. Agreement to within +/- 3.2% was achieved in all cases, establishing that the method is satisfactory for acceptance testing purposes. The mean agreement was good to within 0.2%, but the possibility of a systematic error of between 1% and 3% existing both in this method and in the method used by the manufacturer is discussed.
Affiliation:
North Western Medical Physics, Christie Hospital, Manchester, UK.
Citation:
Calibration of pre-cut iridium-192 wires for low dose rate interstitial brachytherapy using a Farmer-type ionization chamber. 2000, 73 (866):201-5 Br J Radiol
Journal:
The British Journal of Radiology
Issue Date:
Feb-2000
URI:
http://hdl.handle.net/10541/85436
PubMed ID:
10884735
Type:
Article
Language:
en
ISSN:
0007-1285
Appears in Collections:
All Christie Publications

Full metadata record

DC FieldValue Language
dc.contributor.authorVollans, S Een
dc.contributor.authorWilkinson, James Men
dc.date.accessioned2009-11-05T15:11:51Z-
dc.date.available2009-11-05T15:11:51Z-
dc.date.issued2000-02-
dc.identifier.citationCalibration of pre-cut iridium-192 wires for low dose rate interstitial brachytherapy using a Farmer-type ionization chamber. 2000, 73 (866):201-5 Br J Radiolen
dc.identifier.issn0007-1285-
dc.identifier.pmid10884735-
dc.identifier.urihttp://hdl.handle.net/10541/85436-
dc.description.abstractA technique, originally developed for calibrating small low activity caesium sources, which uses a Farmer-type ionization chamber, has been further developed for use with iridium wires. Correction factors have been generated to account for the finite source and detector sizes, and attenuation in the source carriers. The air kerma calibration factor for heavily filtered 280 kV X-rays was used for reference back to the National Standard. The results of this calibration method have been compared with the calibration figures given by the manufacturers over a 5 year period for the emissions from 50 batches of wires of varying strengths. Agreement to within +/- 3.2% was achieved in all cases, establishing that the method is satisfactory for acceptance testing purposes. The mean agreement was good to within 0.2%, but the possibility of a systematic error of between 1% and 3% existing both in this method and in the method used by the manufacturer is discussed.en
dc.language.isoenen
dc.subject.meshBrachytherapy-
dc.subject.meshCalibration-
dc.subject.meshIridium Radioisotopes-
dc.subject.meshRadiometry-
dc.subject.meshReference Standards-
dc.titleCalibration of pre-cut iridium-192 wires for low dose rate interstitial brachytherapy using a Farmer-type ionization chamber.en
dc.typeArticleen
dc.contributor.departmentNorth Western Medical Physics, Christie Hospital, Manchester, UK.en
dc.identifier.journalThe British Journal of Radiologyen
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