PMID: 2494678Mar 1, 1989Paper

A two-dimensional pencil-beam algorithm for calculation of arc electron dose distributions

Physics in Medicine and Biology
K R HogstromGeorge Starkschall

Abstract

A two-dimensional pencil-beam algorithm is presented for the calculation of arc electron dose distributions in any plane that is perpendicular to the axis of rotation. The dose distributions are calculated by modelling the arced beam as a single broad beam defined by the irradiated surface of the patient. The algorithm is two-dimensional in that the anatomical cross section of the patient and the skin collimators are assumed identical in parallel planes outside the plane of calculation. The broad beam is modelled as a collection of strip beams, each strip beam being characterised by its planar fluence, mean projected angular direction and a root-mean-square spread about the mean direction. Using these parameters, the dose distribution is calculated using pencil-beam theory. Examples of strip-beam parameters and resulting dose distributions for patient geometries are presented. Features of the algorithm, which include (1) incorporation of pencil-beam theory for the calculation of dose in heterogeneous tissue, (2) run times of only about twice that of comparable-sized fixed electron fields and (3) the input requirement of only a single depth dose and four off-axis dose profiles of measured data, make the algorithm practical for c...Continue Reading

References

May 1, 1985·International Journal of Radiation Oncology, Biology, Physics·D D LeavittJ R Stewart
Apr 1, 1984·International Journal of Radiation Oncology, Biology, Physics·K R HogstromR S Fields
May 1, 1981·Physics in Medicine and Biology·K R HogstromP R Almond
Mar 1, 1982·Medical Physics·B L WernerF C Deibel

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Citations

Jul 3, 1998·Medical Physics·J A Antolak, K R Hogstrom
Dec 24, 2005·Medical Physics·Pai-Chun M ChiRobert A Boyd
Aug 11, 2006·Medical Physics·Pai-Chun M ChiJohn A Antolak
May 1, 1990·International Journal of Radiation Oncology, Biology, Physics·K R HogstromT Rich
Aug 28, 2007·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·Swamidas V JamemaShyam K Shrivastava
Jun 23, 2006·Physics in Medicine and Biology·Kenneth R Hogstrom, Peter R Almond
Jun 1, 1995·Physics in Medicine and Biology·K R RussellA Montelius
Nov 27, 2001·Physics in Medicine and Biology·R A BoydG Starkschall

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