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Monte Carlo simulation of the Compton scattering technique applied to characterize diagnostic x‐ray spectra
Author(s) -
Gallardo S.,
Ródenas J.,
Verdú G.
Publication year - 2004
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 - 10.1118/1.1759827
Subject(s) - monte carlo method , collimated light , compton scattering , physics , optics , scattering , computational physics , spectrometer , detector , spectral line , photon , beam (structure) , laser , statistics , mathematics , astronomy
The quality control of x‐ray tubes for medical radiodiagnostic services is very important for such devices. Therefore, the development of new procedures to characterize the x‐ray primary beam is highly interesting in order to obtain an accurate assessment of the actual photon spectrum. The Compton scattering technique is very useful to determine x‐ray spectra (in the 10–150 kVp range), avoiding a pile‐up effect in the detector since a large room is not usually available to apply other techniques. In this work, this process has been simulated using a Monte Carlo code, MCNP 4C . Some geometrical models have been developed and different techniques have been studied in order to improve statistics and accuracy in the acquisition of Pulse Height Distribution (PHD). The effect of both the collimation of the primary beam and the scattering angle of the spectrometer has been analyzed. Results obtained using simulation models have been compared with experimental measurements.