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Proceedings Paper

Combined x-ray/electron/optical Monte Carlo code based on PENELOPE and DETECT-II
Author(s): Aldo Badano; Josep Sempau; Jonathan S. Boswell
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Paper Abstract

We describe MANTIS (Monte carlo x-rAy electroN opTical Imaging Simulation), a tool for simulating imaging systems that tracks x rays, electrons, and optical photons in the same geometric model. The x-ray and electron transport and involved physics models are from the PENELOPE package and include elastic and inelastic scattering, and bremsstrahlung from 100 eV to 1 GeV. The optical transport and corresponding physics models are from DETECT-II and include Fresnel refraction and reflection at material boundaries, bulk absorption and scattering. X rays are generated using the flexible source description from PENELOPE. When x rays or electrons interact and deposit energy in the scintillator, the code generates a number of optical quanta at that location, according to a model for the conversion process. The optical photons are then tracked until they reach an absorption event that in some cases contributes to the electronic signal. We demonstrate the capabilities of the new tool with respect to x-ray source, object to be imaged, and detector models. Of particular importance is the improved geometric description of structured phosphors that can handle tilted columns in needle-like phosphor screens. Examples of the simulation output with respect to signal blur and pulse-height distributions of the scintillation light are discussed and compared with previously published experimental results.

Paper Details

Date Published: 20 April 2005
PDF: 7 pages
Proc. SPIE 5745, Medical Imaging 2005: Physics of Medical Imaging, (20 April 2005); doi: 10.1117/12.596726
Show Author Affiliations
Aldo Badano, FDC Ctr. for Devices and Radiological Health (United States)
Josep Sempau, Univ. Politecnica de Catalunya (Spain)
Jonathan S. Boswell, FDC Ctr. for Devices and Radiological Health (United States)

Published in SPIE Proceedings Vol. 5745:
Medical Imaging 2005: Physics of Medical Imaging
Michael J. Flynn, Editor(s)

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