| Download | - View final version: Determination of the output of the linac-MR system, installed at the Cross Cancer Institute, using alanine dosimeters traceable to the Canadian primary standard of absorbed dose to water (PDF, 1.1 MiB)
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| DOI | Resolve DOI: https://doi.org/10.4224/40003125 |
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| Author | Search for: McEwen, Malcolm1ORCID identifier: https://orcid.org/0000-0002-8699-0089; Search for: Muir, Bryan1; Search for: Yip, Eugene; Search for: Oliver, Patricia; Search for: Tari, Shima; Search for: Wood, Tania; Search for: Johnson, Neil; Search for: Reynolds Michael |
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| Affiliation | - National Research Council of Canada. Metrology Research Centre
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| Format | Text, Technical Report |
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| Subject | alanine; MR-linac; dosimetry |
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| Abstract | The National Research Council of Canada has developed a capability for using alanine dosimeters to measure absorbed dose to water at therapy dose levels in Co-60 and MV photon beams. The stated uncertainty in the determination of dose using such dosimeters in a clinical radiation beam is estimated to be less than 1 % for doses in the range 10 Gy to 100 Gy. This NRC capability was applied to the linac-MR installed at the Cross Cancer Institute to provide external validation of the dose measured by medical physicists at the centre using standard dosimetry protocols and ionization chambers. Control dosimeters were used to investigate any impact of shipping, no significant effect was seen. The dose was determined from the alanine measurements using a calibration in a Co-60 zero-magnetic field combined with correction factors for the actual irradiation field being a ~ 7 MV x-ray beam in a 0.5 T magnetic field (1.005 and 0.998 respectively). The agreement between stated and measured doses was better than 1 %, less than the combined k=1 uncertainty of the alanine and ion chamber dose measurements. |
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| Publication date | 2023-01 |
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| Publisher | National Research Council of Canada |
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| Series | |
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| Language | English |
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| Peer reviewed | No |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | a50d3fb3-9e6c-4f22-99dc-91ba97946d86 |
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| Record created | 2023-07-31 |
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| Record modified | 2023-08-08 |
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