Development of a simulator for radiographic image optimization

Authors:
Mark Winslow;X. George Xu;Birsen Yazici
Affiliations:
Program of Nuclear Eng. and Eng. Physics, Rensselaer Polytechnic Institute, Troy, NY 12180, USA;Program of Nuclear Eng. and Eng. Physics, Rensselaer Polytechnic Institute, Troy, NY 12180, USA and Department of Biomedical Engineering, Rensselaer Polytechnic Institute, NES Building, Tibbits Av ...;Department of Electrical, Computer, & Systems Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
Venue:
Computer Methods and Programs in Biomedicine
Year:
2005

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Abstract

A software package, incorporating two computational patient phantoms, has been developed for optimizing X-ray radiographic imaging. A tomographic phantom, visible photographic Man tomographic phantom (VIP-Man), constructed from Visible Human anatomical color images is used to simulate the scattered portion of an X-ray system using the Electron Gamma Shower National Research Council (EGSnrc) Monte Carlo code. The primary portion of an X-ray image is simulated using the projection ray-tracing method through the Visible Human CT data set. To produce a realistic image, the software simulates quantum noise, blurring effects, lesions, detector absorption efficiency, and other imaging artifacts. The primary and scattered portions of an X-ray chest image are combined to form a final image for future observer studies and image quality analysis. Absorbed doses in organs and tissues of the segmented VIP-Man phantom were also obtained from the Monte Carlo simulations. This paper presents methods of the simulator and preliminary results.