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Proceedings Paper

Joint energy-spatial model for formation of a gamma image sequence indexed in energy
Author(s): Christian Faye; Mai K. Nguyen; Luc Eglin; Patrick Duvaut
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Paper Abstract

This paper proposes a realistic joint energy-spatial description of the various phenomena encountered in low energy gamma imagery: Compton diffusion, photoelectric absorption, collimator and detector behavior, shot noise affecting the images. This physical model takes into account the full energy dimension of the scattered photons, and can construct a series of images indexed in energy. It is based on the last generation of SPECT (single photon emission computed tomography) medical gamma cameras which operate in list mode (both the coordinates and the energy of the (gamma) photons are measured), in the energy range [50 - 500 keV]. In the model proposed, two hypotheses are made: (1) only the first order scattering is considered, (2) the diffusing medium is homogeneous. This model is computationally light and could lead to the development of new enhancing techniques using the energy dimension.

Paper Details

Date Published: 28 May 1999
PDF: 11 pages
Proc. SPIE 3659, Medical Imaging 1999: Physics of Medical Imaging, (28 May 1999); doi: 10.1117/12.349503
Show Author Affiliations
Christian Faye, Ecole Nationale Superieure de l'Electronique et de ses Applications (France)
Mai K. Nguyen, Ecole Nationale Superieure de l'Electronique et de ses Applications (France)
Luc Eglin, Ecole Nationale Superieure de l'Electronique et de ses Applications (France)
Patrick Duvaut, Ecole Nationale Superieure de l'Electronique et de ses Applications (France)


Published in SPIE Proceedings Vol. 3659:
Medical Imaging 1999: Physics of Medical Imaging
John M. Boone; James T. Dobbins, Editor(s)

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