Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Projector Model for Efficient List-Mode Reconstruction in PET Scanners with Parallel Planar Detectors
Year:2011
Research Areas
  • Medical equipment,
  • Electronic technology and of the communications,
  • Electronics engineering
Information
Abstract
We have developed a new projector model specifically tailored for fast list?mode tomographic reconstructions in Positron emission tomography (PET) scanners with parallel planar detectors. The model provides an accurate estimation of the probability distribution of coincidence events defined by pairs of scintillating crystals. This distribution is parameterized with 2D elliptical Gaussian functions defined in planes perpendicular to the main axis of the tube of response (TOR). The parameters of these Gaussian functions have been obtained by fitting Monte Carlo simulations that include positron range, acolinearity of gamma rays, as well as detector attenuation and scatter effects. The proposed model has been applied efficiently to list-mode reconstruction algorithms. Evaluation with Monte Carlo simulations over a rotating high resolution PET scanner indicates that this model allows to obtain better recovery to noise ratio in OSEM (ordered-subsets, expectationmaximization) reconstruction, if compared to list-mode reconstruction with symmetric circular Gaussian TOR model, and histogram-based OSEM with precalculated system matrix using Monte Carlo simulated models and symmetries.
International
Si
Congress
IEEE Nuclear Science Symposium Conference
960
Place
Valencia, España
Reviewers
Si
ISBN/ISSN
1082-3654
10.1109/NSSMIC.2011.6153800
Start Date
23/09/2011
End Date
29/09/2011
From page
4180
To page
4183
IEEE Nuclear Science Symposium Conference Record
Participants
  • Autor: Juan Enrique Ortuño Fisac (UPM)
  • Autor: Giancarlo Sportelli . (UPM)
  • Autor: Pedro Guerra Gutierrez (UPM)
  • Autor: Andres de Santos Lleo (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Tecnología de imágenes biomédicas
  • Centro o Instituto I+D+i: Centro de tecnología Biomédica CTB
  • Departamento: Ingeniería Electrónica
S2i 2020 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)