Published date:Apr 17 2018

Journal Title: KnE Energy

Issue title: The 2nd International Symposium "Physics, Engineering and Technologies for Biomedicine"

Pages:149–154

DOI: 10.18502/ken.v3i2.1806

M A Kolyvanovakolyvanova@physics.msu.ru

V A Klimanov

A N Moiseev

An analytical model of the dose kernel of pencil beam for photon with the Bremsstrahlung spectrum with maximum energy 6 MV was created in this work, which makes it possible to determine the primary and scattered components of the absorbed dose in water phantom with an acceptable error for practice. Using this model a simply method of dosimetry of small circular cross section 6 MV photon beam was proposed. It combines the absolute measurement of the absorbed dose in the water at the reference point for reference geometry with the calculation of the deep dose distribution by simple analytical formulas for circular beams with an arbitrary radius of the cross section.

Keywords: dose kernels, pencil beam, dosimetry, small photon beam, radiotherapy.

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