Efficient methodologies for system matrix modelling in iterative image reconstruction for rotating high-resolution PET

Ortuño Fisac, Juan Enrique; Kontaxakis Antoniadis, Georgios; Rubio Guivernau, José Luis; Guerra Gutiérrez, Pedro y Santos Lleo, Andres de (2010). Efficient methodologies for system matrix modelling in iterative image reconstruction for rotating high-resolution PET. "PHYSICS IN MEDICINE AND BIOLOGY", v. 55 (n. 7); pp. 1833-1861. ISSN 0031-9155. https://doi.org/10.1088/0031-9155/55/7/004.

Descripción

Título: Efficient methodologies for system matrix modelling in iterative image reconstruction for rotating high-resolution PET
Autor/es:
  • Ortuño Fisac, Juan Enrique
  • Kontaxakis Antoniadis, Georgios
  • Rubio Guivernau, José Luis
  • Guerra Gutiérrez, Pedro
  • Santos Lleo, Andres de
Tipo de Documento: Artículo
Título de Revista/Publicación: PHYSICS IN MEDICINE AND BIOLOGY
Fecha: 2010
Volumen: 55
Materias:
Escuela: E.T.S.I. Telecomunicación (UPM)
Departamento: Ingeniería Electrónica
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

Texto completo

[img]
Vista Previa
PDF (Document Portable Format) - Se necesita un visor de ficheros PDF, como GSview, Xpdf o Adobe Acrobat Reader
Descargar (1MB) | Vista Previa

Resumen

A fully 3D iterative image reconstruction algorithm has been developed for high-resolution PET cameras composed of pixelated scintillator crystal arrays and rotating planar detectors, based on the ordered subsets approach. The associated system matrix is precalculated with Monte Carlo methods that incorporate physical effects not included in analytical models, such as positron range effects and interaction of the incident gammas with the scintillator material. Custom Monte Carlo methodologies have been developed and optimized for modelling of system matrices for fast iterative image reconstruction adapted to specific scanner geometries, without redundant calculations. According to the methodology proposed here, only one-eighth of the voxels within two central transaxial slices need to be modelled in detail. The rest of the system matrix elements can be obtained with the aid of axial symmetries and redundancies, as well as in-plane symmetries within transaxial slices. Sparse matrix techniques for the non-zero system matrix elements are employed, allowing for fast execution of the image reconstruction process. This 3D image reconstruction scheme has been compared in terms of image quality to a 2D fast implementation of the OSEM algorithm combined with Fourier rebinning approaches. This work confirms the superiority of fully 3D OSEM in terms of spatial resolution, contrast recovery and noise reduction as compared to conventional 2D approaches based on rebinning schemes. At the same time it demonstrates that fully 3D methodologies can be efficiently applied to the image reconstruction problem for high-resolution rotational PET cameras by applying accurate pre-calculated system models and taking advantage of the system's symmetries.

Más información

ID de Registro: 13623
Identificador DC: http://oa.upm.es/13623/
Identificador OAI: oai:oa.upm.es:13623
Identificador DOI: 10.1088/0031-9155/55/7/004
URL Oficial: http://iopscience.iop.org/0031-9155/55/7/004/
Depositado por: Memoria Investigacion
Depositado el: 21 Nov 2012 11:38
Ultima Modificación: 21 Abr 2016 12:57
  • Open Access
  • Open Access
  • Sherpa-Romeo
    Compruebe si la revista anglosajona en la que ha publicado un artículo permite también su publicación en abierto.
  • Dulcinea
    Compruebe si la revista española en la que ha publicado un artículo permite también su publicación en abierto.
  • Recolecta
  • e-ciencia
  • Observatorio I+D+i UPM
  • OpenCourseWare UPM