Use of 3D printed materials as tissue-equivalent phantoms

Kairn, Tanya, Crowe, Scott, & Markwell, Tim (2015) Use of 3D printed materials as tissue-equivalent phantoms. In Jaffray, David A. (Ed.) IFMBE Proceedings: World Congress on Medical Physics and Biomedical Engineering, Springer, Toronto, Canada, pp. 728-731.

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Abstract

This study used the specific example of 3D printing with acrylonitrile butadiene styrene (ABS) as a means to investigate the potential usefulness of benchtop rapid prototyping as a technique for producing patient specific phantoms for radiotherapy dosimetry. Three small cylinders and one model of a human lung were produced via in-house 3D printing with ABS, using 90%, 50%, 30% and 10% ABS infill densities. These phantom samples were evaluated in terms of their geometric accuracy, tissue equivalence and radiation hardness, when irradiated using a range of clinical radiotherapy beams. The measured dimensions of the small cylindrical phantoms all matched their planned dimensions, within 1mm. The lung phantom was less accurately matched to the lung geometry on which it was based, due to simplifications introduced during the phantom design process. The mass densities, electron densities and linear attenuation coefficients identified using CT data, as well as the results of film measurements made using megavoltage photon and electron beams, indicated that phantoms printed with ABS, using infill densities of 30% or more, are potentially useful as lung- and tissue-equivalent phantoms for patient-specific radiotherapy dosimetry. All cylindrical 3D printed phantom samples were found to be unaffected by prolonged radiation and to accurately match their design specifications. However, care should be taken to avoid oversimplifying anatomical structures when printing more complex phantoms.

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ID Code: 86643
Item Type: Conference Paper
Refereed: Yes
Additional Information: World Congress on Medical Physics and Biomedical Engineering, June 7-12, 2015, Toronto, Canada
Keywords: radiation therapy, rapid prototyping, lung phantom
DOI: 10.1007/978-3-319-19387-8_179
ISBN: 9783319193878
ISSN: 1433-9277
Subjects: Australian and New Zealand Standard Research Classification > PHYSICAL SCIENCES (020000) > OTHER PHYSICAL SCIENCES (029900) > Medical Physics (029903)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2015 Springer International Publishing Switzerland
Copyright Statement: The final publication is available at Springer via http://dx.doi.org/10.1007/978-3-319-19387-8_179
Deposited On: 19 Aug 2015 05:22
Last Modified: 01 Jul 2016 19:21

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