Title :
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
fDate :
31 Oct-6 Nov 1993
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;
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
DOI :
10.1109/NSSMIC.1993.373550
