Comparison of IPSM 1990 photon dosimetry code of practice with IAEA TRS-398 and AAPM TG-51.

2.50
Hdl Handle:
http://hdl.handle.net/10541/69742
Title:
Comparison of IPSM 1990 photon dosimetry code of practice with IAEA TRS-398 and AAPM TG-51.
Authors:
Vargas-Castrillón, Silvia T; Cutanda Henriquez, Francisco
Abstract:
Several codes of practice for photon dosimetry are currently used around the world, supported by different organizations. A comparison of IPSM 1990 with both IAEA TRS-398 and AAPM TG-51 has been performed. All three protocols are based on the calibration of ionization chambers in terms of standards of absorbed dose to water, as it is the case with other modern codes of practice. This comparison has been carried out for photon beams of nominal energies: 4 MV, 6 MV, 8 MV, 10 MV and 18 MV. An NE 2571 graphite ionization chamber was used in this study, cross-calibrated against an NE 2611A Secondary Standard, calibrated in the National Physical Laboratory (NPL). Absolute dose in reference conditions was obtained using each of these three protocols including: beam quality indices, beam quality conversion factors both theoretical and NPL experimental ones, correction factors for influence quantities and absolute dose measurements. Each protocol recommendations have been strictly followed. Uncertainties have been obtained according to the ISO Guide to the Expression of Uncertainty in Measurement. Absorbed dose obtained according to all three protocols agree within experimental uncertainty. The largest difference between absolute dose results for two protocols is obtained for the highest energy: 0.7% between IPSM 1990 and IAEA TRS-398 using theoretical beam quality conversion factors.
Affiliation:
NW Medical Physics, Christie Hospital NHS Foundation Trust, Manchester, UK. stvcastrillon@hotmail.com
Citation:
Comparison of IPSM 1990 photon dosimetry code of practice with IAEA TRS-398 and AAPM TG-51. 2009, 10 (1):2810 J Appl Clin Med Phys
Journal:
Journal of Applied Clinical Medical Physics
Issue Date:
2009
URI:
http://hdl.handle.net/10541/69742
PubMed ID:
19223831
Type:
Article
Language:
en
ISSN:
1526-9914
Appears in Collections:
All Christie Publications ; Christie Medical Physics and Engineering Research

Full metadata record

DC FieldValue Language
dc.contributor.authorVargas-Castrillón, Silvia T-
dc.contributor.authorCutanda Henriquez, Francisco-
dc.date.accessioned2009-06-04T16:24:51Z-
dc.date.available2009-06-04T16:24:51Z-
dc.date.issued2009-
dc.identifier.citationComparison of IPSM 1990 photon dosimetry code of practice with IAEA TRS-398 and AAPM TG-51. 2009, 10 (1):2810 J Appl Clin Med Physen
dc.identifier.issn1526-9914-
dc.identifier.pmid19223831-
dc.identifier.urihttp://hdl.handle.net/10541/69742-
dc.description.abstractSeveral codes of practice for photon dosimetry are currently used around the world, supported by different organizations. A comparison of IPSM 1990 with both IAEA TRS-398 and AAPM TG-51 has been performed. All three protocols are based on the calibration of ionization chambers in terms of standards of absorbed dose to water, as it is the case with other modern codes of practice. This comparison has been carried out for photon beams of nominal energies: 4 MV, 6 MV, 8 MV, 10 MV and 18 MV. An NE 2571 graphite ionization chamber was used in this study, cross-calibrated against an NE 2611A Secondary Standard, calibrated in the National Physical Laboratory (NPL). Absolute dose in reference conditions was obtained using each of these three protocols including: beam quality indices, beam quality conversion factors both theoretical and NPL experimental ones, correction factors for influence quantities and absolute dose measurements. Each protocol recommendations have been strictly followed. Uncertainties have been obtained according to the ISO Guide to the Expression of Uncertainty in Measurement. Absorbed dose obtained according to all three protocols agree within experimental uncertainty. The largest difference between absolute dose results for two protocols is obtained for the highest energy: 0.7% between IPSM 1990 and IAEA TRS-398 using theoretical beam quality conversion factors.en
dc.language.isoenen
dc.subjectPhoton Beam Dosimetryen
dc.subjectCode of Practiceen
dc.subjectAbsorbed Dose to Wateren
dc.titleComparison of IPSM 1990 photon dosimetry code of practice with IAEA TRS-398 and AAPM TG-51.en
dc.typeArticleen
dc.contributor.departmentNW Medical Physics, Christie Hospital NHS Foundation Trust, Manchester, UK. stvcastrillon@hotmail.comen
dc.identifier.journalJournal of Applied Clinical Medical Physicsen
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