Combination of high resolution analytically computed uncollided flux images with low resolution Monte Carlo computed scattered flux images

• Published in: IEEE transactions on nuclear science Vol. 51; no. 1; pp. 212 - 217
• Main Authors: Tabary, J., Guillemaud, R., Mathy, F., Gliere, A., Hugonnard, P.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.02.2004; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Analytical models; Biomedical imaging; Computational modeling; Electromagnetic scattering; Image analysis; Image resolution; Monte Carlo methods; Optical computing; Particle scattering; Radiography; Studies
• ISSN: 0018-9499; 1558-1578
• DOI: 10.1109/TNS.2003.823038

A new computing model has been implemented in Sindbad, a simulation software dedicated to radiographic systems, to provide quite rapidly realistic radiographs of complex objects, including the scatter component of the photon flux. The new computing model consists of a coupling of two previous models: an analytical approach and a Monte Carlo one. The analytical simulation is used to compute a high resolution uncollided photon flux image whereas the Monte Carlo provides the scattered flux image. This latter image is computed as a scaling of a reduced fluence Monte Carlo scattered flux image. Scaling is possible thanks to the low resolution feature of the scattered flux image. After a detailed description of the method developed to perform the combination, we present a validation on a medical radiograph simulation. In spite of the quite complex geometry of the examined part and the large number of emitted photons, this new computing model provides a realistic radiograph with a good estimation of the scattered flux in a reasonable computation time.