Memorias de investigación
Ponencias en congresos:
Projector Model for Efficient List-Mode Reconstruction in PET Scanners with Parallel Planar Detectors
Año:2011
Áreas de investigación
  • Equipo médico,
  • Tecnología electrónica y de las comunicaciones,
  • Industria electrónica
Datos
Descripción
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.
Internacional
Si
Nombre congreso
IEEE Nuclear Science Symposium Conference
Tipo de participación
960
Lugar del congreso
Valencia, España
Revisores
Si
ISBN o ISSN
1082-3654
DOI
10.1109/NSSMIC.2011.6153800
Fecha inicio congreso
23/09/2011
Fecha fin congreso
29/09/2011
Desde la página
4180
Hasta la página
4183
Título de las actas
IEEE Nuclear Science Symposium Conference Record
Esta actividad pertenece a memorias de investigación
Participantes
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Tecnología de imágenes biomédicas
  • Centro o Instituto I+D+i: Centro de tecnología Biomédica CTB
  • Departamento: Ingeniería Electrónica