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Kierkels RGJ, Hernandez V, Saez J, Angerud A, Hilgers GC, Surmann K, Schuring D, Minken AWH. Multileaf collimator characterization and modeling for a 1.5 T MR-linac using static synchronous and asynchronous sweeping gaps. Phys Med Biol 2024; 69:075004. [PMID: 38412538 DOI: 10.1088/1361-6560/ad2d7d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Accepted: 02/27/2024] [Indexed: 02/29/2024]
Abstract
Objective.The Elekta unity MR-linac delivers step-and-shoot intensity modulated radiotherapy plans using a multileaf collimator (MLC) based on the Agility MLC used on conventional Elekta linacs. Currently, details of the physical Unity MLC and the computational model within its treatment planning system (TPS)Monacoare lacking in published literature. Recently, a novel approach to characterize the physical properties of MLCs was introduced using dynamic synchronous and asynchronous sweeping gap (aSG) tests. Our objective was to develop a step-and-shoot version of the dynamic aSG test to characterize the Unity MLC and the computational MLC models in theMonacoandRayStationTPSs.Approach.Dynamic aSG were discretized into a step-and-shoot aSG by investigating the number of segments/sweep and the minimal number of monitor units (MU) per segment. The step-and-shoot aSG tests were compared to the dynamic aSG tests on a conventional linac at a source-to-detector distance of 143.5 cm, mimicking the Unity configuration. the step-and-shoot aSG tests were used to characterize the Unity MLC through measurements and dose calculations in both TPSs.Main results.The step-and-shoot aSGs tests with 100 segments and 5 MU/segment gave results very similar to the dynamic aSG experiments. The effective tongue-and-groove width of the Unity gradually increased up to 1.4 cm from the leaf tip end. The MLC models inRayStationandMonacoagreed with experimental data within 2.0% and 10%, respectively. The largest discrepancies inMonacowere found for aSG tests with >10 mm leaf interdigitation, which are non-typical for clinical plans.Significance.The step-and-shoot aSG tests accurately characterize the MLC in step-and-shoot delivery mode. The MLC model inRayStation2023B accurately describes the tongue-and-groove and leaf tip effects whereasMonacooverestimates the tongue-and-groove shadowing further away from the leaf tip end.
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Affiliation(s)
| | - Victor Hernandez
- Hospital Sant Joan de Reus, Department of Medical Physics, Reus, Spain
| | - Jordi Saez
- Hospital Clínic de Barcelona, Department of Radiation Oncology, Barcelona, Spain
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Hilgers GC, Ikink M, Potters I, Schuring D, Minken AW. Characterization of the on-board megavoltage imager in a magnetic resonance-guided radiotherapy machine for beam output checks. Phys Imaging Radiat Oncol 2024; 29:100558. [PMID: 38405429 PMCID: PMC10891347 DOI: 10.1016/j.phro.2024.100558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 02/12/2024] [Accepted: 02/12/2024] [Indexed: 02/27/2024] Open
Abstract
We characterized the on-board megavoltage imager (MVI) of a magnetic resonance-guided radiotherapy machine for beam output checks. Linearity and repeatability of its dose response were investigated. Alignment relative to the beam under clinical circumstances was evaluated for a year using daily measurements. Linearity and short-term repeatability were excellent. Long-term repeatability drifted 0.8 % per year, which can be overcome by monthly cross calibrations. Long-term alignment was stable. Thus, the MVI has suitable characteristics for beam output checks.
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Affiliation(s)
| | - Marijke Ikink
- Radiotherapiegroep, Arnhem/Deventer, The Netherlands
| | - Ilona Potters
- Radiotherapiegroep, Arnhem/Deventer, The Netherlands
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Schuring D, Westendorp H, van der Bijl E, Bol GH, Crijns W, Delor A, Jourani Y, Ong CL, Penninkhof J, Kierkels R, Verbakel W, van de Water T, van de Kamer JB. The NCS code of practice for the quality assurance of treatment planning systems (NCS-35). Phys Med Biol 2023; 68:205017. [PMID: 37748504 DOI: 10.1088/1361-6560/acfd06] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 09/25/2023] [Indexed: 09/27/2023]
Abstract
A subcommittee of the Netherlands Commission on Radiation Dosimetry (NCS) was initiated in 2018 with the task to update and extend a previous publication (NCS-15) on the quality assurance of treatment planning systems (TPS) (Bruinviset al2005). The field of treatment planning has changed considerably since 2005. Whereas the focus of the previous report was more on the technical aspects of the TPS, the scope of this report is broader with a focus on a department wide implementation of the TPS. New sections about education, automated planning, information technology (IT) and updates are therefore added. Although the scope is photon therapy, large parts of this report will also apply to all other treatment modalities. This paper is a condensed version of these guidelines; the full version of the report in English is freely available from the NCS website (http://radiationdosimetry.org/ncs/publications). The paper starts with the scope of this report in relation to earlier reports on this subject. Next, general aspects of the commissioning process are addressed, like e.g. project management, education, and safety. It then focusses more on technical aspects such as beam commissioning and patient modeling, dose representation, dose calculation and (automated) plan optimisation. The final chapters deal with IT-related subjects and scripting, and the process of updating or upgrading the TPS.
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Affiliation(s)
- D Schuring
- Radiotherapiegroep, Radiation Oncology department, Arnhem/Deventer, The Netherlands
| | - H Westendorp
- Isala Hospital, Oncology department, Zwolle, The Netherlands
| | - E van der Bijl
- Radboud University Medical Center, Radiation Oncology department, Nijmegen, The Netherlands
| | - G H Bol
- University Medical Center Utrecht, Radiotherapy department, Utrecht, The Netherlands
| | - W Crijns
- KU Leuven-UZ Leuven, Oncology department, Radiation Oncology, Leuven, Belgium
| | - A Delor
- Institut Roi Albert II, Cliniques universitaires Saint-Luc, Radiation Oncology department, Brussels, Belgium
| | - Y Jourani
- Institut Jules Bordet-Université Libre de Bruxelles, Medical Physics department, Brussels, Belgium
| | - C Loon Ong
- Haga Hospital, Radiation Oncology department, The Hague, The Netherlands
| | - J Penninkhof
- Erasmus MC Cancer Institute-University Medical Center Rotterdam, Radiation Oncology department, Rotterdam, The Netherlands
| | - R Kierkels
- Radiotherapiegroep, Radiation Oncology department, Arnhem/Deventer, The Netherlands
| | - W Verbakel
- Amsterdam University Medical Centers-location VUmc, Radiation Oncology Department, Amsterdam, The Netherlands
| | - T van de Water
- Radiotherapeutic Institute Friesland, Leeuwarden, The Netherlands
| | - J B van de Kamer
- The Netherlands Cancer Institute, Department of Radiation Oncology, Amsterdam, The Netherlands
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Hilgers GC, Ikink M, Potters I, Schuring D. Beam output checks of a commercial high-field magnetic resonance-guided radiotherapy machine with its on-board megavoltage imager. Phys Imaging Radiat Oncol 2023; 25:100411. [PMID: 36687506 PMCID: PMC9852784 DOI: 10.1016/j.phro.2023.100411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 01/06/2023] [Accepted: 01/09/2023] [Indexed: 01/13/2023] Open
Abstract
Beam output checks of a commercial high-field magnetic resonance-guided radiotherapy machine can be performed with its on-board megavoltage imager (MVI). This is a fast and efficient method, but only recommended for daily checks. The aim of our study was to show its suitability for weekly checks by investigating its long-term agreement with the golden standard: ionization chamber measurements in a water tank. For one year, the output deviations obtained with both methods were compared. The difference was 0.1 ± 0.3 (1SD) percentage point. This indicated an excellent agreement, and translated into a tolerance level of ± 2 %.
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Affiliation(s)
- Guido C. Hilgers
- Corresponding author at: Department of Medical Physics, Radiotherapiegroep, Behandellocatie Deventer, Postbus 123, 7400 AC Deventer, The Netherlands.
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Schuring D, Kierkels R, Hilgers G, Potters I, den Hartogh M, Jeene P, Surmann K. PO-1678 Monitor unit range check as an alternative for secondary dose calculation in online MR-guided RT. Radiother Oncol 2022. [DOI: 10.1016/s0167-8140(22)03642-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Antonissen K, van Dijk - Stoltenborg I, Brouwer - Ezendam K, Lindeboom - Smit T, den Hartogh M, Schuring D, Jeene P. OC-0134 Patient-reported treatment experience is comparable for MR-linac and conventional linac. Radiother Oncol 2022. [DOI: 10.1016/s0167-8140(22)02510-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Jourani Y, Delor A, Crijns W, Bol G, Kierkels R, Ong C, Penninkhof J, van der Bijl E, van de Water T, Verbakel W, Schuring D, Westendorp R, van de Kamer J. PH-0547 Quality assurance of Treatment Planning Systems: upgrading the NCS report 15. Radiother Oncol 2021. [DOI: 10.1016/s0167-8140(21)07357-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Van Nunen A, De Graaf A, Budiharto T, Schuring D. PO-1100 Validation of Atlas Based Segmentation for OAR in the brain. Radiother Oncol 2019. [DOI: 10.1016/s0167-8140(19)31520-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Schuring D, Van Nunen A, Van Aarle F, Nunen TJ, Budiharto T. PO-0941 Can dose gradient-based plan optimisations compete with autoplanning for optimal prostate plans? Radiother Oncol 2019. [DOI: 10.1016/s0167-8140(19)31361-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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van Nunen A, van der Toorn P, Budiharto T, Schuring D. Optimal image guided radiation therapy strategy for organs at risk sparing in radiotherapy of the prostate including pelvic lymph nodes. Radiother Oncol 2018; 127:68-73. [DOI: 10.1016/j.radonc.2018.02.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Revised: 02/09/2018] [Accepted: 02/11/2018] [Indexed: 10/17/2022]
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Meessen S, De Beer F, Van Haaren P, Schuring D. PO-1000: Immobilisation systems for brain treatment: are individual head supports needed for stable fixation? Radiother Oncol 2017. [DOI: 10.1016/s0167-8140(17)31436-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Van Nunen A, Budiharto T, De Vocht B, Schuring D. PO-1009: Evaluation of setup margins using cone-beam CT for prostate and pelvic nodes irradiation. Radiother Oncol 2017. [DOI: 10.1016/s0167-8140(17)31445-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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de Smet M, Schuring D, Nijsten S, Verhaegen F. Accuracy of dose calculations on kV cone beam CT images of lung cancer patients. Med Phys 2016; 43:5934. [DOI: 10.1118/1.4964455] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
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Mans A, Schuring D, Arends MP, Vugts CAJM, Wolthaus JWH, Lotz HT, Admiraal M, Louwe RJW, Öllers MC, van de Kamer JB. The NCS code of practice for the quality assurance and control for volumetric modulated arc therapy. Phys Med Biol 2016; 61:7221-7235. [PMID: 27649474 DOI: 10.1088/0031-9155/61/19/7221] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
In 2010, the NCS (Netherlands Commission on Radiation Dosimetry) installed a subcommittee to develop guidelines for quality assurance and control for volumetric modulated arc therapy (VMAT) treatments. The report (published in 2015) has been written by Dutch medical physicists and has therefore, inevitably, a Dutch focus. This paper is a condensed version of these guidelines, the full report in English is freely available from the NCS website www.radiationdosimetry.org. After describing the transition from IMRT to VMAT, the paper addresses machine quality assurance (QA) and treatment planning system (TPS) commissioning for VMAT. The final section discusses patient specific QA issues such as the use of class solutions, measurement devices and dose evaluation methods.
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Affiliation(s)
- Anton Mans
- Department of Radiation Oncology, Netherlands Cancer Institute, Amsterdam, The Netherlands
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De Smet M, Schuring D, Nijsten S, Verhaegen F. EP-1811: Accuracy of dose calculations on CBCT scans of lung cancer patients using a vendor-specific approach. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)33062-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Fontanarosa D, Witte M, Meijer G, Shakirin G, Steenhuijsen J, Schuring D, van Herk M, Lambin P. Probabilistic evaluation of target dose deterioration in dose painting by numbers for stage II/III lung cancer. Pract Radiat Oncol 2015; 5:e375-82. [DOI: 10.1016/j.prro.2015.01.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2014] [Revised: 11/27/2014] [Accepted: 01/06/2015] [Indexed: 11/25/2022]
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Fairchild A, Langendijk JA, Nuyts S, Scrase C, Tomsej M, Schuring D, Gulyban A, Ghosh S, Weber DC, Budach W. Quality assurance for the EORTC 22071-26071 study: dummy run prospective analysis. Radiat Oncol 2014; 9:248. [PMID: 25424399 PMCID: PMC4311463 DOI: 10.1186/s13014-014-0248-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2014] [Accepted: 11/04/2014] [Indexed: 11/10/2022] Open
Abstract
Purpose The phase III 22071–26071 trial was designed to evaluate the addition of panitumumab to adjuvant chemotherapy plus intensity modulated radiotherapy (IMRT) in locally advanced resected squamous cell head and neck cancer. We report the results of the dummy run (DR) performed to detect deviations from protocol guidelines. Methods and Materials DR datasets consisting of target volumes, organs at risk (OAR) and treatment plans were digitally uploaded, then compared with reference contours and protocol guidelines by six central reviewers. Summary statistics and analyses of potential correlations between delineations and plan characteristics were performed. Results Of 23 datasets, 20 (87.0%) GTVs were evaluated as acceptable/borderline, along with 13 (56.5%) CTVs and 10 (43.5%) PTVs. All PTV dose requirements were met by 73.9% of cases. Dose constraints were met for 65.2-100% of mandatory OARs. Statistically significant correlations were observed between the subjective acceptability of contours and the ability to meet dose constraints for all OARs (p ≤ 0.01) except for the parotids and spinal cord. Ipsilateral parotid doses correlated significantly with CTV and PTV volumes (p ≤ 0.05). Conclusions The observed wide variations in treatment planning, despite strict guidelines, confirms the complexity of development and quality assurance of IMRT-based multicentre studies for head and neck cancer. Electronic supplementary material The online version of this article (doi:10.1186/s13014-014-0248-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Alysa Fairchild
- Department of Radiation Oncology, Cross Cancer Institute, 11560 University Avenue, T6G 1Z2, Edmonton, AB, Canada.
| | - Johannes A Langendijk
- Department of Radiation Oncology, University of Groningen, University Medical Centre Groningen, Groningen, The Netherlands.
| | - Sandra Nuyts
- Department of Radiation Oncology, University Hospital Leuven, KU Leuven, Leuven, Belgium.
| | | | - Milan Tomsej
- Department of Radiotherapy, CHU Charleroi, Charleroi, Belgium. .,EORTC Quality Assurance in Radiotherapy Team, Brussels, Belgium.
| | - Danny Schuring
- Department of Radiotherapy, Catharina Hospital, Eindhoven, The Netherlands.
| | - Akos Gulyban
- Department of Radiation Oncology, University Hospital of Liege, Liege, Belgium.
| | - Sunita Ghosh
- Department of Experimental Oncology, Cross Cancer Institute, Edmonton, Canada.
| | - Damien C Weber
- EORTC Quality Assurance in Radiotherapy Team, Brussels, Belgium. .,Centre for Proton Therapy, Paul Scherrer Institute, Villigen, Switzerland.
| | - Wilfried Budach
- Department of Radiation Oncology, Heinrich Heine University, Dusseldorf, Germany.
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Van den Bosch M, Van den Berg H, De Jaeger K, Hagelaar E, Palmen M, Steenhuijsen J, Schuring D. PO-0871: Plan-of-the-day strategy in IMRT treatment of cervical cancer ñ when to use and when not. Radiother Oncol 2014. [DOI: 10.1016/s0167-8140(15)30989-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Van Den Bosch M, Van Den Berg H, De Jaeger K, Hagelaar E, Palmen M, Schuring D. Optimizing PTV for IMRT of Cervical Cancer Using Structure-Specific Margins. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.1887] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Unipan M, Schuring D, van Barneveld S, van Aarle F, Habraken A, van der Toorn P. PO-0710: The necessity and effectiveness of adaptive replanning of patients having large prostate rotations. Radiother Oncol 2013. [DOI: 10.1016/s0167-8140(15)33016-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Holt A, Van Gestel D, Arends MP, Korevaar EW, Schuring D, Kunze-Busch MC, Louwe RJ, van Vliet-Vroegindeweij C. Multi-institutional comparison of volumetric modulated arc therapy vs. intensity-modulated radiation therapy for head-and-neck cancer: a planning study. Radiat Oncol 2013; 8:26. [PMID: 23369221 PMCID: PMC3599974 DOI: 10.1186/1748-717x-8-26] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2012] [Accepted: 12/28/2012] [Indexed: 11/10/2022] Open
Abstract
Background Compared to static beam Intensity-Modulated Radiation Therapy (IMRT), the main advantage of Volumetric Modulated Arc Therapy (VMAT) is a shortened delivery time, which leads to improved patient comfort and possibly smaller intra-fraction movements. This study aims at a treatment planner-independent comparison of radiotherapy treatment planning of IMRT and VMAT for head-and-neck cancer performed by several institutes and based on the same CT- and contouring data. Methods Five institutes generated IMRT and VMAT plans for five oropharyngeal cancer patients using either Pinnacle3 or Oncentra Masterplan to be delivered on Elekta linear accelerators. Results Comparison of VMAT and IMRT plans within the same patient and institute showed significantly better sparing for almost all OARs with VMAT. The average mean dose to the parotid glands and oral cavity was reduced from 27.2 Gy and 39.4 Gy for IMRT to 25.0 Gy and 36.7 Gy for VMAT, respectively. The dose conformity at 95% of the prescribed dose for PTVboost and PTVtotal was 1.45 and 1.62 for IMRT and 1.37 and 1.50 for VMAT, respectively. The average effective delivery time was reduced from 13:15 min for IMRT to 5:54 min for VMAT. Conclusions Independently of institution-specific optimization strategies, the quality of the VMAT plans including double arcs was superior to step-and-shoot IMRT plans including 5–9 beam ports, while the effective treatment delivery time was shortened by ~50% with VMAT.
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Affiliation(s)
- Andrea Holt
- Department of Radiation Oncology, The Netherlands Cancer Institute - Antoni van Leeuwenhoek Hospital, Plesmanlaan 121, Amsterdam, CX 1066, The Netherlands
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Steenhuijsen J, Schuring D, Rosario T, Bal M, Meijer G. EP-1388 DELIVERY ACCURACY OF TREATMENT PLANS FOR DOSE PAINTING BY NUMBERS. Radiother Oncol 2012. [DOI: 10.1016/s0167-8140(12)71721-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Schuring D, Steenhuijsen J, Bal M, Meijer G. OC-0552 DOSE PAINTING BY NUMBERS: HOW MANY SEGMENTS ARE NEEDED TO CREATE CLINICALLY ACCEPTABLE PLANS? Radiother Oncol 2012. [DOI: 10.1016/s0167-8140(12)70891-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Meijer G, Steenhuijsen J, Bal M, De Jaeger K, Schuring D, Theuws J. Dose painting by contours versus dose painting by numbers for stage II/III lung cancer: Practical implications of using a broad or sharp brush. Radiother Oncol 2011; 100:396-401. [DOI: 10.1016/j.radonc.2011.08.048] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2011] [Revised: 08/29/2011] [Accepted: 08/30/2011] [Indexed: 01/07/2023]
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Hurkmans CW, van Lieshout M, Schuring D, van Heumen MJ, Cuijpers JP, Lagerwaard FJ, Widder J, van der Heide UA, Senan S. Quality Assurance of 4D-CT Scan Techniques in Multicenter Phase III Trial of Surgery Versus Stereotactic Radiotherapy (Radiosurgery or Surgery for Operable Early Stage (Stage 1A) Non–Small-Cell Lung Cancer [ROSEL] Study). Int J Radiat Oncol Biol Phys 2011; 80:918-27. [DOI: 10.1016/j.ijrobp.2010.08.017] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2010] [Revised: 07/29/2010] [Accepted: 08/01/2010] [Indexed: 12/25/2022]
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Meijer G, Bal M, de Jaeger K, Schuring D, Steenhuijsen J, Theuws J. 324 oral DOSE PAINTING BY CONTOURS VERSUS DOSE PAINTING BY NUMBERS FOR LOCALLY ADVANCED LUNG TUMOURS; PRACTICAL IMPLICATIONS OF USING A BROAD OR SHARP BRUSH. Radiother Oncol 2011. [DOI: 10.1016/s0167-8140(11)70446-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Meijer G, Migchielsen J, Schuring D, van der Toorn P, Weterings J, De Wildt M, Bal M. Early Clinical Experience with an Online IGART Protocol for Bladder Cancer Patients by In-room Plan Selection Based on CBCT Images. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Hurkmans C, Schuring D, van Lieshout M, van Dert-Barneveld S, van Heumen M, Cuijpers J, Lagerwaard F, Widder J, van der Heide U, Senan S. Quality Assurance of Stereotactic Radiotherapy Techniques for a Randomized Phase III Trial Comparing Surgery to Radiosurgery (ROSEL) for Stage Ia NSCLC. Int J Radiat Oncol Biol Phys 2009. [DOI: 10.1016/j.ijrobp.2009.07.1565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Meijer G, Migchielsen J, Schuring D, Van der Toorn P, Weterings J, de Wildt M. ONLINE IGART FOR BLADDER CANCER PATIENTS BY IN-ROOM PLAN SELECTION BASED ON CBCT IMAGES. Radiother Oncol 2009. [DOI: 10.1016/s0167-8140(12)72652-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Schuring D, Meijer G, van Aarle F, Cassee J, Scheenstra T, Schmeets I. SMARTARC FOR HEAD AND NECK PATIENTS, HOW MANY ARCS ARE NEEDED? Radiother Oncol 2009. [DOI: 10.1016/s0167-8140(12)73106-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Hurkmans CW, Cuijpers JP, Lagerwaard FJ, Widder J, van der Heide UA, Schuring D, Senan S. Recommendations for implementing stereotactic radiotherapy in peripheral stage IA non-small cell lung cancer: report from the Quality Assurance Working Party of the randomised phase III ROSEL study. Radiat Oncol 2009; 4:1. [PMID: 19138400 PMCID: PMC2631491 DOI: 10.1186/1748-717x-4-1] [Citation(s) in RCA: 197] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2008] [Accepted: 01/12/2009] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND A phase III multi-centre randomised trial (ROSEL) has been initiated to establish the role of stereotactic radiotherapy in patients with operable stage IA lung cancer. Due to rapid changes in radiotherapy technology and evolving techniques for image-guided delivery, guidelines had to be developed in order to ensure uniformity in implementation of stereotactic radiotherapy in this multi-centre study. METHODS/DESIGN A Quality Assurance Working Party was formed by radiation oncologists and clinical physicists from both academic as well as non-academic hospitals that had already implemented stereotactic radiotherapy for lung cancer. A literature survey was conducted and consensus meetings were held in which both the knowledge from the literature and clinical experience were pooled. In addition, a planning study was performed in 26 stage I patients, of which 22 were stage 1A, in order to develop and evaluate the planning guidelines. Plans were optimised according to parameters adopted from RTOG trials using both an algorithm with a simple homogeneity correction (Type A) and a more advanced algorithm (Type B). Dose conformity requirements were then formulated based on these results. CONCLUSION Based on current literature and expert experience, guidelines were formulated for this phase III study of stereotactic radiotherapy versus surgery. These guidelines can serve to facilitate the design of future multi-centre clinical trials of stereotactic radiotherapy in other patient groups and aid a more uniform implementation of this technique outside clinical trials.
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Affiliation(s)
- Coen W Hurkmans
- Department of Radiation Therapy, Catharina Hospital, Eindhoven, The Netherlands
| | - Johan P Cuijpers
- Department of Radiation Oncology, VU University Medical Center, Amsterdam, The Netherlands
| | - Frank J Lagerwaard
- Department of Radiation Oncology, VU University Medical Center, Amsterdam, The Netherlands
| | - Joachim Widder
- Department of Radiation Oncology, University Medical Center Groningen, Groningen, The Netherlands
| | - Uulke A van der Heide
- Department of Radiation Oncology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Danny Schuring
- Department of Radiation Therapy, Catharina Hospital, Eindhoven, The Netherlands
| | - Suresh Senan
- Department of Radiation Oncology, VU University Medical Center, Amsterdam, The Netherlands
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Schuring D, Hurkmans CW. Developing and evaluating stereotactic lung RT trials: what we should know about the influence of inhomogeneity corrections on dose. Radiat Oncol 2008; 3:21. [PMID: 18662379 PMCID: PMC2515326 DOI: 10.1186/1748-717x-3-21] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2008] [Accepted: 07/28/2008] [Indexed: 12/13/2022] Open
Abstract
Purpose To investigate the influence of inhomogeneity corrections on stereotactic treatment plans for non-small cell lung cancer and determine the dose delivered to the PTV and OARs. Materials and methods For 26 patients with stage-I NSCLC treatment plans were optimized with unit density (UD), an equivalent pathlength algorithm (EPL), and a collapsed-cone (CC) algorithm, prescribing 60 Gy to the PTV. After optimization the first two plans were recalculated with the more accurate CC algorithm. Dose parameters were compared for the three different optimized plans. Dose to the target and OARs was evaluated for the recalculated plans and compared with the planned values. Results For the CC algorithm dose constraints for the ratio of the 50% isodose volume and the PTV, and the V20 Gy are harder to fulfill. After recalculation of the UD and EPL plans large variations in the dose to the PTV were observed. For the unit density plans, the dose to the PTV varied from 42.1 to 63.4 Gy for individual patients. The EPL plans all overestimated the PTV dose (average 48.0 Gy). For the lungs, the recalculated V20 Gy was highly correlated to the planned value, and was 12% higher for the UD plans (R2 = 0.99), and 15% lower for the EPL plans (R2 = 0.96). Conclusion Inhomogeneity corrections have a large influence on the dose delivered to the PTV and OARs for SBRT of lung tumors. A simple rescaling of the dose to the PTV is not possible, implicating that accurate dose calculations are necessary for these treatment plans in order to prevent large discrepancies between planned and actually delivered doses to individual patients.
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Affiliation(s)
- Danny Schuring
- Catharina-hospital, Department of radiotherapy, Michelangelolaan 2, PO box 1350, 5602 ZA, Eindhoven, The Netherlands.
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Sobczyk D, Hesen J, van Grondelle J, Schuring D, de Jong A, van Santen R. Adsorption Assisted Desorption of NH3on γ-Alumina Studied with Positron Emission Profiling. Catal Letters 2004. [DOI: 10.1023/b:catl.0000019328.16620.1d] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Koriabkina AO, de Jong AM, Schuring D, van Grondelle J, van Santen RA. Influence of the Acid Sites on the Intracrystalline Diffusion of Hexanes and Their Mixtures within MFI-Zeolites. J Phys Chem B 2002. [DOI: 10.1021/jp014464a] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alina O. Koriabkina
- Laboratory of Inorganic Chemistry and Catalysis, Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, and Accelerator Laboratory, Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Arthur M. de Jong
- Laboratory of Inorganic Chemistry and Catalysis, Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, and Accelerator Laboratory, Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Danny Schuring
- Laboratory of Inorganic Chemistry and Catalysis, Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, and Accelerator Laboratory, Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Joop van Grondelle
- Laboratory of Inorganic Chemistry and Catalysis, Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, and Accelerator Laboratory, Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Rutger A. van Santen
- Laboratory of Inorganic Chemistry and Catalysis, Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, and Accelerator Laboratory, Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
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Noordhoek NJ, Schuring D, de Gauw FJMM, Anderson BG, de Jong AM, de Voigt MJA, van Santen RA. In Situ Study of Alkane Conversion on Pt-Loaded Acidic Zeolites. Ind Eng Chem Res 2002. [DOI: 10.1021/ie010455c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Niels J. Noordhoek
- Accelerator Laboratory, Department of Applied Physics, and Department of Inorganic Chemistry and Catalysis, Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Danny Schuring
- Accelerator Laboratory, Department of Applied Physics, and Department of Inorganic Chemistry and Catalysis, Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Frank J. M. M. de Gauw
- Accelerator Laboratory, Department of Applied Physics, and Department of Inorganic Chemistry and Catalysis, Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Bruce G. Anderson
- Accelerator Laboratory, Department of Applied Physics, and Department of Inorganic Chemistry and Catalysis, Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Arthur M. de Jong
- Accelerator Laboratory, Department of Applied Physics, and Department of Inorganic Chemistry and Catalysis, Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Martien J. A. de Voigt
- Accelerator Laboratory, Department of Applied Physics, and Department of Inorganic Chemistry and Catalysis, Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Rutger A. van Santen
- Accelerator Laboratory, Department of Applied Physics, and Department of Inorganic Chemistry and Catalysis, Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
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Schuring D, Koriabkina AO, de Jong AM, Smit B, van Santen RA. Adsorption and Diffusion of n-Hexane/2-Methylpentane Mixtures in Zeolite Silicalite: Experiments and Modeling. J Phys Chem B 2001. [DOI: 10.1021/jp010158l] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- D. Schuring
- Laboratory of Inorganic Chemistry and Catalysis and Accelerator Laboratory, Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, and Department of Chemical Engineering, University of Amsterdam, Nieuwe Achtergracht 166, 1018 WV Amsterdam, The Netherlands
| | - A. O. Koriabkina
- Laboratory of Inorganic Chemistry and Catalysis and Accelerator Laboratory, Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, and Department of Chemical Engineering, University of Amsterdam, Nieuwe Achtergracht 166, 1018 WV Amsterdam, The Netherlands
| | - A. M. de Jong
- Laboratory of Inorganic Chemistry and Catalysis and Accelerator Laboratory, Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, and Department of Chemical Engineering, University of Amsterdam, Nieuwe Achtergracht 166, 1018 WV Amsterdam, The Netherlands
| | - B. Smit
- Laboratory of Inorganic Chemistry and Catalysis and Accelerator Laboratory, Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, and Department of Chemical Engineering, University of Amsterdam, Nieuwe Achtergracht 166, 1018 WV Amsterdam, The Netherlands
| | - R. A. van Santen
- Laboratory of Inorganic Chemistry and Catalysis and Accelerator Laboratory, Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, and Department of Chemical Engineering, University of Amsterdam, Nieuwe Achtergracht 166, 1018 WV Amsterdam, The Netherlands
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Schuring D, Jansen APJ, van Santen RA. Concentration and Chainlength Dependence of the Diffusivity of Alkanes in Zeolites Studied with MD Simulations. J Phys Chem B 2000. [DOI: 10.1021/jp9927698] [Citation(s) in RCA: 77] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- D. Schuring
- Schuit Institute of Catalysis, Laboratory of Inorganic Chemistry and Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - A. P. J. Jansen
- Schuit Institute of Catalysis, Laboratory of Inorganic Chemistry and Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - R. A. van Santen
- Schuit Institute of Catalysis, Laboratory of Inorganic Chemistry and Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
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