Characterisation of the half-field beam penumbra for a variety of blocking set-ups

Smith, Shaun, Kairn, Tanya, Crowe, Scott, Asena, Andre, & Trapp, Jamie (2015) Characterisation of the half-field beam penumbra for a variety of blocking set-ups. Journal of Physics: Conference Series, 573(1), 012073.

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Abstract

Measurements of half-field beam penumbra were taken using EBT2 film for a variety of blocking techniques. It was shown that minimizing the SSD reduces the penumbra as the effects of beam divergence are diminished. The addition of a lead block directly on the surface provides optimal results with a 10-90% penumbra of 0.53 ± 0.02 cm. To resolve the uncertainties encountered in film measurements, future Monte Carlo measurements of halffield penumbras are to be conducted.

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ID Code: 80030
Item Type: Journal Article
Refereed: Yes
Additional URLs:
Keywords: radiotherapy, penumbra, half field
DOI: 10.1088/1742-6596/573/1/012073
ISSN: 1742-6596
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
Funding:
Copyright Statement: Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
Deposited On: 14 Jan 2015 23:12
Last Modified: 06 Sep 2016 03:18

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