Improving spatial resolution in SPECT with the combination of PSPMT based detector and iterative reconstruction algorithms.
Comput Med Imaging Graph
; 27(4): 307-13, 2003.
Article
en En
| MEDLINE
| ID: mdl-12631516
ABSTRACT
This paper investigates the possibility of developing a SPECT system that combines the high spatial resolution of position sensitive photomultiplier tubes (PSPMTs) with the excellent performance of iterative reconstruction algorithms. A small field of view (FOV) camera based on a PSPMT and a pixelized scintillation crystal made of CsI(Tl) have been used for the acquisition of the projections. With the use of maximum likelihood expectation maximization (ML-EM) and ordered subsets expectation maximization (OSEM) slices of the object are obtained while three-dimensional (3D) reconstruction of the object is carried out using a modified marching cubes (MMC) algorithm. The spatial resolution of tomographic images obtained with the system was 2-3mm. The spatial resolution of a conventional system that uses filtered backprojection (FBP) for slices reconstruction was more than 9 mm.
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Bases de datos:
MEDLINE
Asunto principal:
Algoritmos
/
Tomografía Computarizada de Emisión de Fotón Único
Límite:
Humans
Idioma:
En
Revista:
Comput Med Imaging Graph
Asunto de la revista:
DIAGNOSTICO POR IMAGEM
Año:
2003
Tipo del documento:
Article
País de afiliación:
Grecia