Dosimetric evaluation of a patient-specific 3D-printed oral positioning stent for head-and-neck radiotherapy
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Description
As head-and-neck radiotherapy treatments become more complex and sophisticated, and the need to control and stabilise the positioning of intra-oral anatomy therefore becomes more important, leading the increasing use of oral positioning stents during head-and-neck radiotherapy simulation and delivery. As an alternative to the established practice of creating oral positioning stents using wax, this study investigated the use of a 3D printing technique. An Ender 5 3D printer (Creality 3D, Shenzhen, China) was used, with PLA+ \food-safe" polylactic acid lament (3D Fillies, Dandenong South, Australia), to produce a low-density 3D printed duplicate of a conventional wax stent. The physical and dosimetric effects of the two stents were evaluated using radiochromic film in a solid head phantom that was modifed to include flexible parts. The Varian Eclipse treatment planning system (Varian Medical Systems, Palo Alto, USA) was used to calculate the dose from two different head-and-neck treatment plans for the phantom with each of the two stents. Examination of the resulting four dose distributions showed that both stents effectively pushed sensitive oral tissues away from the treatment targets, even though most of the phantom was solid. Film measurements confirmed the accuracy of the dose calculations from the treatment planning system, despite the steep density gradients in the treated volume, and demonstrated that the 3D print could be a suitable replacement for the wax stent. This study demonstrated a useful method for dosimetrically testing novel oral positioning stents. We recommend the development of flexible phantoms for future studies.
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ID Code: | 210881 | ||||||||
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Item Type: | Contribution to Journal (Journal Article) | ||||||||
Refereed: | Yes | ||||||||
ORCID iD: |
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Additional Information: | Funding Information: Contributions to this work from Susannah Cleland, Scott B. Crowe, Elise Obereigner and Tania Poroa were supported by a Metro North Hospital and Health Service funded Herston Biofabrication Institute Programme Grant (no grant number). | ||||||||
Measurements or Duration: | 13 pages | ||||||||
Keywords: | radiation therapy, Additive manufacture, rapid prototyping, dosimetry | ||||||||
DOI: | 10.1007/s13246-021-01025-y | ||||||||
ISSN: | 2662-4737 | ||||||||
Pure ID: | 85624971 | ||||||||
Divisions: | Current > QUT Faculties and Divisions > Faculty of Science Current > Schools > School of Chemistry & Physics |
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Funding Information: | Contributions to this work from Susannah Cleland, Scott B. Crowe, Elise Obereigner and Tania Poroa were supported by a Metro North Hospital and Health Service funded Herston Biofabrication Institute Programme Grant (no grant number). | ||||||||
Copyright Owner: | Australasian College of Physical Scientists and Engineers in Medicine 2021 | ||||||||
Copyright Statement: | This work is covered by copyright. Unless the document is being made available under a Creative Commons Licence, you must assume that re-use is limited to personal use and that permission from the copyright owner must be obtained for all other uses. If the document is available under a Creative Commons License (or other specified license) then refer to the Licence for details of permitted re-use. It is a condition of access that users recognise and abide by the legal requirements associated with these rights. If you believe that this work infringes copyright please provide details by email to qut.copyright@qut.edu.au | ||||||||
Deposited On: | 04 Jun 2021 03:46 | ||||||||
Last Modified: | 25 May 2024 19:40 |
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