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SU‐E‐T‐51: A National QA Audit of QA Systems Used for IMRT and VMAT Patient QA
Purpose: To independently validate patient‐specific quality assurance for IMRT and VMAT plans using the same set of treatment plans for all institutes. Methods: In February 2014 we devised a set of treatment plans: simple IMRT/VMAT plans; more complex IMRT/VMAT plans and a stereotactic VMAT plan, al...
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Published in: | Medical physics (Lancaster) 2015-06, Vol.42 (6Part12), p.3342-3342 |
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creator | Seravalli, E Houweling, A Van Gellekom, M Kaas, J Kuik, M Loeff, E Raaben, T De Pooter, J de Vries, W Van de Kamer, J |
description | Purpose:
To independently validate patient‐specific quality assurance for IMRT and VMAT plans using the same set of treatment plans for all institutes.
Methods:
In February 2014 we devised a set of treatment plans: simple IMRT/VMAT plans; more complex IMRT/VMAT plans and a stereotactic VMAT plan, all 6MV for both Varian and Elekta linacs. In total we used 5 Varian and 8 Elekta plans. The plans were imported in the institute's treatment planning system for dose computation on the phantom of the audit team and the institute's phantom. Additionally, 10x10 cm2 fields were made and computed on both phantoms. Next, the audit team performed measurements using the audit equipment. So far, 18 audits have been performed and we expect to have concluded the audits by June 2015. The measurements were performed using an ionization chamber (PinPoint, PTW), Gafchromic film and a 2D ionization chamber array, all in an octagonal phantom (Octavius, PTW, see Figure). Differences between the measured and computed 2D dose distributions were investigated using a gamma analysis with a 5%/1mm criterion for the stereotactic treatment plan and 3%/3mm for the other plans. Additionally, the participating centres performed QA measurements of the same treatment plans according to their local protocol and equipment.
Results:
For the 10x10 field on the phantom, the first 18 audits showed differences with respect to the planning of −0.21 (range: −1.8; 2.2)%. See Table 1 for more results. The findings compared well with the QA measurement results reported by the institutions according to their local protocols.
Conclusion:
These preliminary results demonstrate that such a national QA audit is feasible. Importing and computing the prepared treatment plans in the planning systems in use in the country is achievable. The local QA systems provided similar results as found with the audit. |
doi_str_mv | 10.1118/1.4924412 |
format | article |
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To independently validate patient‐specific quality assurance for IMRT and VMAT plans using the same set of treatment plans for all institutes.
Methods:
In February 2014 we devised a set of treatment plans: simple IMRT/VMAT plans; more complex IMRT/VMAT plans and a stereotactic VMAT plan, all 6MV for both Varian and Elekta linacs. In total we used 5 Varian and 8 Elekta plans. The plans were imported in the institute's treatment planning system for dose computation on the phantom of the audit team and the institute's phantom. Additionally, 10x10 cm2 fields were made and computed on both phantoms. Next, the audit team performed measurements using the audit equipment. So far, 18 audits have been performed and we expect to have concluded the audits by June 2015. The measurements were performed using an ionization chamber (PinPoint, PTW), Gafchromic film and a 2D ionization chamber array, all in an octagonal phantom (Octavius, PTW, see Figure). Differences between the measured and computed 2D dose distributions were investigated using a gamma analysis with a 5%/1mm criterion for the stereotactic treatment plan and 3%/3mm for the other plans. Additionally, the participating centres performed QA measurements of the same treatment plans according to their local protocol and equipment.
Results:
For the 10x10 field on the phantom, the first 18 audits showed differences with respect to the planning of −0.21 (range: −1.8; 2.2)%. See Table 1 for more results. The findings compared well with the QA measurement results reported by the institutions according to their local protocols.
Conclusion:
These preliminary results demonstrate that such a national QA audit is feasible. Importing and computing the prepared treatment plans in the planning systems in use in the country is achievable. The local QA systems provided similar results as found with the audit.</description><identifier>ISSN: 0094-2405</identifier><identifier>EISSN: 2473-4209</identifier><identifier>DOI: 10.1118/1.4924412</identifier><language>eng</language><publisher>American Association of Physicists in Medicine</publisher><subject>Computer systems ; Intensity modulated radiation therapy ; Ionization chambers ; Linear accelerators ; Medical treatment planning ; Quality assurance</subject><ispartof>Medical physics (Lancaster), 2015-06, Vol.42 (6Part12), p.3342-3342</ispartof><rights>2015 American Association of Physicists in Medicine</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids></links><search><creatorcontrib>Seravalli, E</creatorcontrib><creatorcontrib>Houweling, A</creatorcontrib><creatorcontrib>Van Gellekom, M</creatorcontrib><creatorcontrib>Kaas, J</creatorcontrib><creatorcontrib>Kuik, M</creatorcontrib><creatorcontrib>Loeff, E</creatorcontrib><creatorcontrib>Raaben, T</creatorcontrib><creatorcontrib>De Pooter, J</creatorcontrib><creatorcontrib>de Vries, W</creatorcontrib><creatorcontrib>Van de Kamer, J</creatorcontrib><title>SU‐E‐T‐51: A National QA Audit of QA Systems Used for IMRT and VMAT Patient QA</title><title>Medical physics (Lancaster)</title><description>Purpose:
To independently validate patient‐specific quality assurance for IMRT and VMAT plans using the same set of treatment plans for all institutes.
Methods:
In February 2014 we devised a set of treatment plans: simple IMRT/VMAT plans; more complex IMRT/VMAT plans and a stereotactic VMAT plan, all 6MV for both Varian and Elekta linacs. In total we used 5 Varian and 8 Elekta plans. The plans were imported in the institute's treatment planning system for dose computation on the phantom of the audit team and the institute's phantom. Additionally, 10x10 cm2 fields were made and computed on both phantoms. Next, the audit team performed measurements using the audit equipment. So far, 18 audits have been performed and we expect to have concluded the audits by June 2015. The measurements were performed using an ionization chamber (PinPoint, PTW), Gafchromic film and a 2D ionization chamber array, all in an octagonal phantom (Octavius, PTW, see Figure). Differences between the measured and computed 2D dose distributions were investigated using a gamma analysis with a 5%/1mm criterion for the stereotactic treatment plan and 3%/3mm for the other plans. Additionally, the participating centres performed QA measurements of the same treatment plans according to their local protocol and equipment.
Results:
For the 10x10 field on the phantom, the first 18 audits showed differences with respect to the planning of −0.21 (range: −1.8; 2.2)%. See Table 1 for more results. The findings compared well with the QA measurement results reported by the institutions according to their local protocols.
Conclusion:
These preliminary results demonstrate that such a national QA audit is feasible. Importing and computing the prepared treatment plans in the planning systems in use in the country is achievable. The local QA systems provided similar results as found with the audit.</description><subject>Computer systems</subject><subject>Intensity modulated radiation therapy</subject><subject>Ionization chambers</subject><subject>Linear accelerators</subject><subject>Medical treatment planning</subject><subject>Quality assurance</subject><issn>0094-2405</issn><issn>2473-4209</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><recordid>eNp10L9OwzAQBnALgUQoDLyBV4YUn3P5Y7aoKqVSA4WmrJHj2FJQmqA4CGXjEXhGngSXdmX4dDf87oaPkGtgUwBIbmGKgiMCPyEexzjwkTNxSjzGBPocWXhOLqx9Y4xFQcg8km-2P1_fc5fcJYQ7mtJHOdRdKxv6nNL0o6oH2pn9vhntoHeWbq2uqOl6usxecirbir5maU7X7ky3g5OX5MzIxuqr45yQ_H6ezx781dNiOUtXvoo595VSJlQaVCV1kEgwKkYRSo6qFCE3QVRxnahYOhVFHITQyCMWlbFKoETEYEJuDm9V31nba1O89_VO9mMBrNi3UUBxbMNZ_2A_60aP_8MiW__5X8hEXlo</recordid><startdate>201506</startdate><enddate>201506</enddate><creator>Seravalli, E</creator><creator>Houweling, A</creator><creator>Van Gellekom, M</creator><creator>Kaas, J</creator><creator>Kuik, M</creator><creator>Loeff, E</creator><creator>Raaben, T</creator><creator>De Pooter, J</creator><creator>de Vries, W</creator><creator>Van de Kamer, J</creator><general>American Association of Physicists in Medicine</general><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>201506</creationdate><title>SU‐E‐T‐51: A National QA Audit of QA Systems Used for IMRT and VMAT Patient QA</title><author>Seravalli, E ; Houweling, A ; Van Gellekom, M ; Kaas, J ; Kuik, M ; Loeff, E ; Raaben, T ; De Pooter, J ; de Vries, W ; Van de Kamer, J</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c722-cccf5ce1cdae38a1fc7495a24cb952f36d2e8c7acf5662199e42606b7c81b4443</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>Computer systems</topic><topic>Intensity modulated radiation therapy</topic><topic>Ionization chambers</topic><topic>Linear accelerators</topic><topic>Medical treatment planning</topic><topic>Quality assurance</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Seravalli, E</creatorcontrib><creatorcontrib>Houweling, A</creatorcontrib><creatorcontrib>Van Gellekom, M</creatorcontrib><creatorcontrib>Kaas, J</creatorcontrib><creatorcontrib>Kuik, M</creatorcontrib><creatorcontrib>Loeff, E</creatorcontrib><creatorcontrib>Raaben, T</creatorcontrib><creatorcontrib>De Pooter, J</creatorcontrib><creatorcontrib>de Vries, W</creatorcontrib><creatorcontrib>Van de Kamer, J</creatorcontrib><collection>CrossRef</collection><jtitle>Medical physics (Lancaster)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Seravalli, E</au><au>Houweling, A</au><au>Van Gellekom, M</au><au>Kaas, J</au><au>Kuik, M</au><au>Loeff, E</au><au>Raaben, T</au><au>De Pooter, J</au><au>de Vries, W</au><au>Van de Kamer, J</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>SU‐E‐T‐51: A National QA Audit of QA Systems Used for IMRT and VMAT Patient QA</atitle><jtitle>Medical physics (Lancaster)</jtitle><date>2015-06</date><risdate>2015</risdate><volume>42</volume><issue>6Part12</issue><spage>3342</spage><epage>3342</epage><pages>3342-3342</pages><issn>0094-2405</issn><eissn>2473-4209</eissn><abstract>Purpose:
To independently validate patient‐specific quality assurance for IMRT and VMAT plans using the same set of treatment plans for all institutes.
Methods:
In February 2014 we devised a set of treatment plans: simple IMRT/VMAT plans; more complex IMRT/VMAT plans and a stereotactic VMAT plan, all 6MV for both Varian and Elekta linacs. In total we used 5 Varian and 8 Elekta plans. The plans were imported in the institute's treatment planning system for dose computation on the phantom of the audit team and the institute's phantom. Additionally, 10x10 cm2 fields were made and computed on both phantoms. Next, the audit team performed measurements using the audit equipment. So far, 18 audits have been performed and we expect to have concluded the audits by June 2015. The measurements were performed using an ionization chamber (PinPoint, PTW), Gafchromic film and a 2D ionization chamber array, all in an octagonal phantom (Octavius, PTW, see Figure). Differences between the measured and computed 2D dose distributions were investigated using a gamma analysis with a 5%/1mm criterion for the stereotactic treatment plan and 3%/3mm for the other plans. Additionally, the participating centres performed QA measurements of the same treatment plans according to their local protocol and equipment.
Results:
For the 10x10 field on the phantom, the first 18 audits showed differences with respect to the planning of −0.21 (range: −1.8; 2.2)%. See Table 1 for more results. The findings compared well with the QA measurement results reported by the institutions according to their local protocols.
Conclusion:
These preliminary results demonstrate that such a national QA audit is feasible. Importing and computing the prepared treatment plans in the planning systems in use in the country is achievable. The local QA systems provided similar results as found with the audit.</abstract><pub>American Association of Physicists in Medicine</pub><doi>10.1118/1.4924412</doi><tpages>1</tpages></addata></record> |
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source | Wiley-Blackwell Read & Publish Collection |
subjects | Computer systems Intensity modulated radiation therapy Ionization chambers Linear accelerators Medical treatment planning Quality assurance |
title | SU‐E‐T‐51: A National QA Audit of QA Systems Used for IMRT and VMAT Patient QA |
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