Calculation of electron contamination doses produced using blocking trays for 6 MV X-rays
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
Detail(s)
Original language | English |
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Pages (from-to) | 99-102 |
Journal / Publication | Radiation Measurements |
Volume | 35 |
Issue number | 2 |
Publication status | Published - 2002 |
Link(s)
Abstract
Calculation of electron contamination doses whilst using blocking trays in radiotherapy is achieved by comparison of measured absorbed dose within the first few centimeters of a water phantom. Electron contamination of up to 28% of maximum dose is produced at the central axis of the beam whilst using a 6 mm Perspex blocking tray for a 30 cm × 30 cm field. The electron contamination is spread over the entire field reducing slightly towards the edge of the beam. Electron contamination from block trays is also present outside the primary collimated X-ray beam with more than 20% of the maximum dose deposited at the surface, 5 cm outside the primary collimated beam at a field size of 40 cm × 40 cm. The electron contamination spectrum has been calculated from measured results. © 2002 Published by Elsevier Science Ltd.
Citation Format(s)
Calculation of electron contamination doses produced using blocking trays for 6 MV X-rays. / Butson, Martin J.; Cheung, Tsang; Yu, Peter K.N.
In: Radiation Measurements, Vol. 35, No. 2, 2002, p. 99-102.
In: Radiation Measurements, Vol. 35, No. 2, 2002, p. 99-102.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review