- Title
- Linear-accelerator x-ray output: a multicentre chamber-based intercomparison study in Australia and New Zealand
- Creator
- Ebert, M. A.; Howlett, S. J.; Harrison, K.; Cornes, D.; Hamilton, C. S.; Denham, J. D.
- Relation
- Australasian Physical & Engineering Sciences in Medicine Vol. 31, Issue 4, p. 268-279
- Relation
- http://www.acpsem.org.au/index.php/journal.html
- Publisher
- Australasian College of Physical Scientists and Engineers in Medicine
- Resource Type
- journal article
- Date
- 2008
- Description
- This paper describes the process and results of a survey of linear accelerator outputs as part of an Australasian Level III Dosimetry Intercomparison. This study involved the measurement of accelerator output under reference conditions ('Level 1') with a small-volume ionisation chamber in water for 47 beams at 36 radiotherapy centres using the IAEA TRS 398 dose-to-water protocol. The mean ratio of measured to locally-determined accelerator output was 1.003 ± 0.009 (1 standard deviation) with a range from 0.981 to 1.024. No correlation could be found between output ratio and accelerator type or local output calibration protocol. The small-volume chamber used satisfied most requirements for the study though showed some variation in sensitivity via repeated cross-calibration with a chamber calibrated at a primary standards laboratory.
- Subject
- TRS 398; radiotherapy; audit; dosimetry intercomparison
- Identifier
- http://hdl.handle.net/1959.13/40072
- Identifier
- uon:4545
- Identifier
- ISSN:0158-9938
- Language
- eng
- Full Text
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