PMID: 6410420Jun 1, 1983Paper

Calculation of electron beam dose distributions for arbitrarily shaped fields

Physics in Medicine and Biology
I A BruinvisR Van der Laarse

Abstract

A method for the calculation of absorbed dose distributions of arbitrarily shaped electron beams is presented. Isodose distributions and output factors of treatment fields can be predicted with good accuracy, without the need for any dose measurement in the actual field. A Gaussian pencil beam model is employed with two different pencil beams for each electron beam energy. The values of the parameters of the pencil beam dose distributions are determined from a set of measurements of broad beam distributions; in this way the influence of electrons scattered by the applicator walls is taken into account. The dose distribution of electrons scattered from high atomic number metal frames, which define the treatment field contour at the skin, is calculated separately and added. This calculation is based on experimentally derived data. The method has been tested for beams with 6, 10, 14 and 20 MeV electron energy. The distance between calculated and measured isodose lines with values between 10 and 90% is under 0.3 cm. The difference between calculated and measured output factors does not exceed 2%.

References

Jan 1, 1979·International Journal of Radiation Oncology, Biology, Physics·F H Edwards, C W Coffey
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Jan 1, 1980·Acta Radiologica. Oncology·I Lax, A Brahme
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Citations

Jan 1, 1990·The British Journal of Radiology·D JonesM D Hafermann
Apr 1, 1988·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·I A Bruinvis, W A Mathol
Jun 23, 2006·Physics in Medicine and Biology·Kenneth R Hogstrom, Peter R Almond
Feb 1, 1989·Physics in Medicine and Biology·H M Kooy, H Rashid
Jun 1, 1995·Physics in Medicine and Biology·K R RussellA Montelius
Jun 12, 1998·Physics in Medicine and Biology·M G KarlssonB Zackrisson
Dec 30, 1998·Physics in Medicine and Biology·A KapurA L Boyer

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