A comparison of rotation- and blob-based system models for 3D SPECT with depth-dependent detector response.
Phys Med Biol
; 49(11): 2157-68, 2004 Jun 07.
Article
em En
| MEDLINE
| ID: mdl-15248570
ABSTRACT
We compare two different implementations of a 3D SPECT system model for iterative reconstruction, both of which compensate for non-uniform photon attenuation and depth-dependent system response. One implementation performs fast rotation of images represented using a basis of rectangular voxels, whereas the other represents images using a basis of rotationally symmetric volume elements. In our simulations the blob-based approach was found to slightly outperform the rotation-based one in terms of the bias-variance tradeoff in the reconstructed images. Their difference can be significant, however, in terms of computational load. The rotation-based method is faster for many typical SPECT reconstruction problems, but the blob-based one can be better-suited to cases where the reconstruction algorithm needs to process one volume element at a time.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Algoritmos
/
Análise Numérica Assistida por Computador
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Interpretação de Imagem Assistida por Computador
/
Aumento da Imagem
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Tomografia Computadorizada de Emissão de Fóton Único
/
Armazenamento e Recuperação da Informação
/
Imageamento Tridimensional
Tipo de estudo:
Diagnostic_studies
/
Evaluation_studies
/
Prognostic_studies
Limite:
Humans
Idioma:
En
Revista:
Phys Med Biol
Ano de publicação:
2004
Tipo de documento:
Article
País de afiliação:
Estados Unidos