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Monte Carlo studies of x‐ray scattering in transmission diagnostic radiology
Author(s) -
Barnea G.,
Dick C. E.
Publication year - 1986
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.595855
Subject(s) - monte carlo method , imaging phantom , scattering , physics , fluence , x ray , optics , detector , beam (structure) , computational physics , laser , statistics , mathematics
Monte Carlo methods have been used to simulate the scattering of x rays in polystyrene and water phantoms. In particular, the ratio of the scattered to total x‐ray fluence (scatter fraction) has been calculated for monoenergetic x‐ray beams in the energy region relevant to diagnostic radiology and nuclear medicine (30–660 keV). Simulations have been made for representative values of the pertinent geometrical factors; phantom thickness from 5 to 21 cm, x‐ray beam diameters of 10 and 25 cm, and scatterer‐to‐image‐plane separations from 0 to 20 cm. As a function of x‐ray energy, the scatter fraction was found to vary slowly between 30 and 100 keV, and to decrease between 100 and 660 keV. The present results were generated with a special transport code which included the effects of special geometries and the response of the x‐ray detector. With the inclusion of these effects, the results resolved inconsistencies and showed good agreement with previous measured and calculated data.