Document Detail

Assessment of the strength of individual 192Ir seeds in ribbons.
MedLine Citation:
PMID:  10587235     Owner:  NLM     Status:  MEDLINE    
Assessing the strength of individual seed-type sources in ribbon assembles remains a challenge in brachytherapy quality assurance. Geometries to measure a single source in the ribbon usually fail because of low signals if using very thick shielding to block the radiation from the other sources, or contributions from all the other sources if they are not shielded well. A normal well-type chamber with partial lead shielding forming a small slot provides a differential response along the chamber axis that, through a deconvolution/simultaneous-equations technique, sorts the contributions from each source, allowing the derivation of each source's strength.
B Thomadsen; L DeWerd; T McNutt; S DeWerd; D Schmidt
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Medical physics     Volume:  26     ISSN:  0094-2405     ISO Abbreviation:  Med Phys     Publication Date:  1999 Nov 
Date Detail:
Created Date:  1999-12-17     Completed Date:  1999-12-17     Revised Date:  2000-12-18    
Medline Journal Info:
Nlm Unique ID:  0425746     Medline TA:  Med Phys     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  2471-5     Citation Subset:  IM    
Department of Medical Physics, University of Wisconsin, Madison 53706, USA.
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MeSH Terms
Brachytherapy / instrumentation*,  standards
Iridium Radioisotopes / therapeutic use*
Models, Theoretical
Quality Assurance, Health Care
Radiation Protection
Radiotherapy Dosage / standards*
Reproducibility of Results
Reg. No./Substance:
0/Iridium Radioisotopes

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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