Attenuation correction and three-dimensional filter of SPET projections

Author

Berrah, H. ; Bourguignon, M. ; Bendriem, B. ; Syrota, A.

Author_Institution

C.E.A., Orsay, France

fYear

1993

fDate

31 Oct-6 Nov 1993

Firstpage

1543

Abstract

To improve quantification of Single Photon Emission Tomography (SPET) data, an analytical attenuation correction using measured attenuation coefficient maps and applied on projections has been developed. Projections corrected from attenuation require the use of an efficient filter because they are affected by noise. A three-dimensional (3D) Fourier filter has been developed. It is based on the relationship between spatial and angular frequencies. A significant improvement of the of the quantitative results (signal to noise ratio, resolution and contrast) has been observed on phantoms when compared to the routinely used filters. This method was also tested on cardiac and cerebral tomographic data

Keywords

gamma-ray absorption; medical image processing; single photon emission computed tomography; 3D Fourier filter; analytical attenuation correction; cardiac tomographic data; cerebral tomographic data; diagnostic nuclear medicine; efficient filter; image contrast; image resolution; medical diagnostic imaging; phantoms; signal to noise ratio; Attenuation measurement; Data analysis; Filters; Frequency; Imaging phantoms; Signal resolution; Signal to noise ratio; Single photon emission computed tomography; Spatial resolution; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium and Medical Imaging Conference, 1993., 1993 IEEE Conference Record.

Conference_Location

San Francisco, CA

Print_ISBN

0-7803-1487-5

Type

conf

DOI

10.1109/NSSMIC.1993.373550

Filename

373550