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Methodology paper: a novel phantom setup for commissioning of scanned ion beam delivery and TPS

Jäkel, O. ; Ackermann, B. ; Ecker, S. ; Ellerbrock, M. ; Heeg, P. ; Henkner, K. ; Winter, M.

In: Radiation Oncology, 14 (2019), Nr. 77. pp. 1-8. ISSN 1748-717X

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Download (2MB) | Lizenz: Creative Commons LizenzvertragMethodology paper: a novel phantom setup for commissioning of scanned ion beam delivery and TPS by Jäkel, O. ; Ackermann, B. ; Ecker, S. ; Ellerbrock, M. ; Heeg, P. ; Henkner, K. ; Winter, M. underlies the terms of Creative Commons Attribution 4.0

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Abstract

Background: Commissioning of treatment planning systems (TPS) and beam delivery for scanned light ion beams is an important quality assurance task. This requires measurement of large sets of high quality dosimetric data in anthropomorphic phantoms to benchmark the TPS and dose delivery under realistic conditions.

Method: A novel measurement setup is described, which allows for an efficient collection of a large set of accurate dose data in complex phantom geometries. This setup allows dose measurements based on a set of 24 small volume ionization chambers calibrated in dose to water and mounted in a holder, which can be freely positioned in a water phantom with various phantoms mounted in front of the water tank. The phantoms can be scanned in a CT and a CT-based treatment planning can be performed for a direct benchmark of the dose calculation algorithm in various situations.

Results: The system has been used for acceptance testing in scanned light ion beam therapy at Heidelberg Ion Beam Therapy Center for scanned proton and carbon ion beams. It demonstrated to be useful to collect large amounts of high quality data for comparison with the TPS calculation using various phantom geometries.

Conclusion: The setup is an efficient tool for commissioning and verification of treatment planning systems. It is especially suited for dynamic beam delivery, as many data points can be obtained during a single plan delivery, but can be adapted also for other dynamic therapies, like rotational IMRT.

Item Type: Article
Journal or Publication Title: Radiation Oncology
Volume: 14
Number: 77
Publisher: BioMed Central
Place of Publication: London
Date Deposited: 01 Aug 2019 15:05
Date: 2019
ISSN: 1748-717X
Page Range: pp. 1-8
Faculties / Institutes: Service facilities > German Cancer Research Center (DKFZ)
Medizinische Fakultät Heidelberg > Heidelberg Ion-Beam Therapy Center (HIT)
Subjects: 610 Medical sciences Medicine
Uncontrolled Keywords: Scanning ion beam, TPS commissioning, Phantoms
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