Joint energy-spatial model for formation of a gamma image sequence indexed in energy

Christian Faye; Mai K. Nguyen; Luc Eglin; Patrick Duvaut

doi:10.1117/12.349503

28 May 1999 Joint energy-spatial model for formation of a gamma image sequence indexed in energy

Christian Faye, Mai K. Nguyen, Luc Eglin, Patrick Duvaut

Proceedings Volume 3659, Medical Imaging 1999: Physics of Medical Imaging; (1999) https://doi.org/10.1117/12.349503
Event: Medical Imaging '99, 1999, San Diego, CA, United States

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.

Citation Download Citation

Christian Faye, Mai K. Nguyen, Luc Eglin, and Patrick Duvaut "Joint energy-spatial model for formation of a gamma image sequence indexed in energy", Proc. SPIE 3659, Medical Imaging 1999: Physics of Medical Imaging, (28 May 1999); https://doi.org/10.1117/12.349503

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