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Article: A novel compound 6D-offset simulating phantom and quality assurance program for stereotactic image-guided radiation therapy system

TitleA novel compound 6D-offset simulating phantom and quality assurance program for stereotactic image-guided radiation therapy system
Authors
Keywords6D compound offset
6D phantom
ExacTrac
IGRT
Quality assurance
Issue Date2013
Citation
Journal of Applied Clinical Medical Physics, 2013, v. 14, n. 6, p. 100-116 How to Cite?
AbstractA comprehensive quality assurance (QA) device cum program was developed for the commissioning and routine testing of the 6D IGRT systems. In this article, both the new QA system and the BrainLAB IGRT system which was added onto a Varian Clinac were evaluated. A novel compound 6D-offset simulating phantom was designed and fabricated in the Prince of Wales Hospital (PWH), Hong Kong. The QA program generated random compound 6D-offset values. The 6D phantom was simply set up and shifted accordingly. The BrainLAB ExacTrac X-ray IGRT system detected the offsets and then corrected the phantom position automatically through the robotic couch. Routine QA works facilitated data analyses of the detection errors, the correction errors, and the correlations. Fifty sets of data acquired in 2011 in PWH were thoroughly analyzed. The 6D component detection errors and correction errors of the IGRT system were all within ± 1 mm and ± 1° individually. Translational and rotational scalar resultant errors were found to be 0.50 ± 0.27mm and 0.54 ± 0.23°, respectively. Most individual component errors were shown to be independent of their original offset values. The system characteristics were locally established. The BrainLAB 6D IGRT system added onto a regular linac is sufficiently precise for stereotactic RT. This new QA methodology is competent to assure the IGRT system overall integrity. Annual grand analyses are recommended to check local system consistency and for external cross-comparison. The target expansion policy of 1.5 mm 3D margin from CTV to PTV is confirmed for this IGRT system currently in PWH.
Persistent Identifierhttp://hdl.handle.net/10722/325266
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorNgar, Dennis Yuen Kan-
dc.contributor.authorCheung, Michael Lok Man-
dc.contributor.authorKam, Michael Koon Ming-
dc.contributor.authorPoon, Wai Sang-
dc.contributor.authorChan, Anthony Tak Cheung-
dc.date.accessioned2023-02-27T07:31:05Z-
dc.date.available2023-02-27T07:31:05Z-
dc.date.issued2013-
dc.identifier.citationJournal of Applied Clinical Medical Physics, 2013, v. 14, n. 6, p. 100-116-
dc.identifier.urihttp://hdl.handle.net/10722/325266-
dc.description.abstractA comprehensive quality assurance (QA) device cum program was developed for the commissioning and routine testing of the 6D IGRT systems. In this article, both the new QA system and the BrainLAB IGRT system which was added onto a Varian Clinac were evaluated. A novel compound 6D-offset simulating phantom was designed and fabricated in the Prince of Wales Hospital (PWH), Hong Kong. The QA program generated random compound 6D-offset values. The 6D phantom was simply set up and shifted accordingly. The BrainLAB ExacTrac X-ray IGRT system detected the offsets and then corrected the phantom position automatically through the robotic couch. Routine QA works facilitated data analyses of the detection errors, the correction errors, and the correlations. Fifty sets of data acquired in 2011 in PWH were thoroughly analyzed. The 6D component detection errors and correction errors of the IGRT system were all within ± 1 mm and ± 1° individually. Translational and rotational scalar resultant errors were found to be 0.50 ± 0.27mm and 0.54 ± 0.23°, respectively. Most individual component errors were shown to be independent of their original offset values. The system characteristics were locally established. The BrainLAB 6D IGRT system added onto a regular linac is sufficiently precise for stereotactic RT. This new QA methodology is competent to assure the IGRT system overall integrity. Annual grand analyses are recommended to check local system consistency and for external cross-comparison. The target expansion policy of 1.5 mm 3D margin from CTV to PTV is confirmed for this IGRT system currently in PWH.-
dc.languageeng-
dc.relation.ispartofJournal of Applied Clinical Medical Physics-
dc.subject6D compound offset-
dc.subject6D phantom-
dc.subjectExacTrac-
dc.subjectIGRT-
dc.subjectQuality assurance-
dc.titleA novel compound 6D-offset simulating phantom and quality assurance program for stereotactic image-guided radiation therapy system-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1120/jacmp.v14i6.4297-
dc.identifier.pmid24257294-
dc.identifier.scopuseid_2-s2.0-84888393574-
dc.identifier.volume14-
dc.identifier.issue6-
dc.identifier.spage100-
dc.identifier.epage116-
dc.identifier.eissn1526-9914-
dc.identifier.isiWOS:000326931100009-

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