Practical evaluation of an analytical attenuation correction method for a non-uniform attenuator

Author

Ishikawa, Akira ; Ogawa, Koichi

Author_Institution

Dept. of Electon. Informatics, Hosei Univ., Tokyo, Japan

Volume

6

fYear

2004

fDate

16-22 Oct. 2004

Firstpage

3611

Abstract

This paper evaluates an analytical attenuation correction method for a non-uniform attenuator in single photon emission CT. For the analytical attenuation correction method we implemented Kunyansky´s formulation. The performance of this method was compared with that of the OS-EM method with a simulation phantom and an experiment phantom. The results of simulation showed that the analytical method could correct the effect of attenuation at the region where the attenuation coefficients were large. The results of experiments showed that the analytical method was superior to the iterative method and the reduction of scattered photons was very important for quantitative image reconstruction in the clinical setting.

Keywords

attenuators; image reconstruction; iterative methods; phantoms; single photon emission computed tomography; Kunyanskys formulation; OS-EM method; analytical attenuation correction method; experiment phantom; nonuniform attenuator; quantitative image reconstruction; scattered photon; simulation phantom; single photon emission CT; Analytical models; Attenuation; Attenuators; Computed tomography; Electromagnetic scattering; Image analysis; Image reconstruction; Imaging phantoms; Iterative methods; Particle scattering;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium Conference Record, 2004 IEEE

ISSN

1082-3654

Print_ISBN

0-7803-8700-7

Electronic_ISBN

1082-3654

Type

conf

DOI

10.1109/NSSMIC.2004.1466665

Filename

1466665