A method for the assessment of the output of irregularly shaped electron fields

The British Journal of Radiology
D JonesM D Hafermann

Abstract

A simple approach to the calculation of dose in cone-collimated electron fields is presented. The method accounts for variations in lateral scatter with field size using a Clarkson Integration. The reduction in output by an irregularly shaped aperture is evaluated based on measurements of the output at various distances from the aperture in a field 2.5 cm in diameter. The first 14 months of clinical use were analysed and it is shown that in 42 out of 600 calculations, the cutout factor was less than 0.95 and that in 77% of these, the calculation method was accurate to +/- 3%.

References

Mar 1, 1979·International Journal of Radiation Oncology, Biology, Physics·P J BiggsK P Doppke
Feb 1, 1989·Physics in Medicine and Biology·H M Kooy, H Rashid
Jun 1, 1983·Physics in Medicine and Biology·I A BruinvisR Van der Laarse
Sep 1, 1984·Medical Physics·S C SharmaB Jose

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Citations

Mar 31, 2016·World Journal of Radiology·James C L Chow
Aug 1, 2007·Physics in Medicine and Biology·James C L Chow, Grigor N Grigorov
Mar 7, 2006·Journal of Applied Clinical Medical Physics·James C L Chow, Scott Newman

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