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Proceedings Paper

Deriving attenuation coefficients from 3D CT data for SPECT Monte Carlo simulations
Author(s): Veronique Baccarne; A. Turzo; Yves Bizais; M. Farine
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Paper Abstract

Quantitation of nuclear medicine data is a major goal in medical imaging. It implies that photon attenuation, scatter and depth dependent spatial resolution be corrected for. Realistic, anthropomorphic numerical phantoms are needed to understand how these phenomena degrade nuclear medicine images, and to validate correction methods. We developed a Monte Carlo simulator which simulates photon transport in an anthropomorphic phantom. The main feature of our phantom consists in estimating the attenuation coefficient for the three main types of physical interaction from CT data and tissue nature in each voxel. The simulated data obtained with this approach show how accurate in terms of geometry and attenuation coefficient, a phantom must be defined to properly simulate scintigraphic acquisitions. It highlights the important of bone tissues in the formation of scatter as well as the influence of patient's morphology in attenuation phenomena.

Paper Details

Date Published: 2 May 1997
PDF: 11 pages
Proc. SPIE 3032, Medical Imaging 1997: Physics of Medical Imaging, (2 May 1997); doi: 10.1117/12.273982
Show Author Affiliations
Veronique Baccarne, Ecole Centrale de Nantes (Australia)
A. Turzo, Hopital de l'Univ. de Bretagne Occidental (France)
Yves Bizais, Hopital de l'Univ. de Bretagne Occidental (France)
M. Farine, Ecole Navale (France)

Published in SPIE Proceedings Vol. 3032:
Medical Imaging 1997: Physics of Medical Imaging
Richard L. Van Metter; Jacob Beutel, Editor(s)

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