Document Detail

A European quality assurance network for radiotherapy: dose measurement procedure.
MedLine Citation:
PMID:  7568377     Owner:  NLM     Status:  MEDLINE    
In the frame of the experimental implementation of a European quality assurance network for external radiotherapy, the methodology in the European Measuring Centre (MC) is presented. Mailed TL dosimeters are used for the check of the beam output and of the beam quality of photon beams. The thermoluminescent material is PTL 717 LiF powder. The readings were first performed on a manual, and then on an automatic reader, with standard deviations of the mean of 0.7% for one dosimeter. Corrections for supralinearity and for the energy dependence of the dosimeter response are applied. An original method has been developed to correct for the variation of the LiF response as a function of time. It is shown that the sensitivity of the powder changes during storage, leading to a kind of 'inverse fading'. The global uncertainty of the TL postal measurement procedure is estimated to be about 1.5% for the 60Co beams and 2% for the x-ray beams. Intercomparisons with the IAEA and with the EORTC have shown an agreement better than 2% for all energies. It can be concluded that the results of the MC are suitable for the requirements of a European quality assurance network.
S Derreumaux; J Chavaudra; A Bridier; V Rossetti; A Dutreix
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Physics in medicine and biology     Volume:  40     ISSN:  0031-9155     ISO Abbreviation:  Phys Med Biol     Publication Date:  1995 Jul 
Date Detail:
Created Date:  1995-11-21     Completed Date:  1995-11-21     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0401220     Medline TA:  Phys Med Biol     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  1191-208     Citation Subset:  IM    
Department of Physics, Institut Gustave-Roussy, Villejuif, France.
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MeSH Terms
Cobalt Radioisotopes
Gamma Rays
Quality Assurance, Health Care
Radiotherapy / instrumentation,  standards*
Radiotherapy Dosage*
Regression Analysis
Reproducibility of Results
Reg. No./Substance:
0/Cobalt Radioisotopes

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