Research Library

Premium Monte Carlo calculation of effective attenuation coefficients for various compensator materials
du Plessis F. C. P.,
Willemse C. A.
Publication year2003
Publication title
medical physics
Resource typeJournals
PublisherAmerican Association of Physicists in Medicine
Effective attenuation coefficients for 6, 8, and 15 MV photon beams were derived and studied for various compensator materials for square beams with side lengths of 0.5, 1.0, 2.0, 3.0, and 5.0 cm. Calculations were based on depth dose data in water obtained from EGS4 based DOSXYZ Monte Carlo simulations. Depth dose data were calculated using different compensator materials as attenuators of variable thickness. The absorbed dose varied exponentially as a function of absorber thickness at any depth in water on the beam axis for all materials. The effective attenuation coefficient data were compared with measurements for wax, aluminum and brass with values from the literature. Theoretical narrow beam linear attenuation coefficients were calculated and compared with the Monte Carlo data. The effective attenuation coefficient data for all materials were parametrized as functions of field size and depth in water. The effective attenuation coefficient was also parametrized as a function of atomic number. It was found that the effective attenuation coefficients calculated from the DOSXYZ data using a simple source model correspond to measured data for wax, aluminum and brass and published data for lead.
Subject(s)attenuation , attenuation coefficient , beam (structure) , brass , computational physics , copper , mass attenuation coefficient , materials science , mathematics , metallurgy , monte carlo method , optics , physics , statistics
SCImago Journal Rank1.473

Seeing content that should not be on Zendy? Contact us.

This content is not available in your region!

Continue researching here.

Having issues? You can contact us here