Title :
Analytic 3D scatter correction in PET using the Klein-Nishina equation
Author :
Bowen, Chris ; Michel, Christian ; Nahmias, Claude
Author_Institution :
McMaster Univ., Hamilton, Ont., Canada
fDate :
30 Oct-5 Nov 1994
Abstract :
A method for estimating the scatter point spread functions (PSF´s) for use in convolution subtraction scatter correction is proposed. These PSF´s are derived from the Klein-Nishina (K-N) differential cross section equation using a single scatter approximation and require only the attenuation correction factors (ACF´s) of a transmission scan as inputs to describe the distribution of matter in the object. The PSF´s are described in projection space and are intended to be accurate for non-uniform attenuation objects with sources at any location within the objects. The analytic scatter correction theory has been tested by comparison with experimental and Monte Carlo calculated scatter profiles for point sources in water-filled cylinders
Keywords :
gamma-ray scattering; positron emission tomography; 511 keV; Klein-Nishina equation; PET scatter correction; analytic 3D scatter correction; medical diagnostic imaging; nonuniform attenuation objects; nuclear medicine; subject matter distribution; transmission scan; water-filled cylinders; Attenuation; Convolution; Detectors; Electromagnetic scattering; Equations; Monte Carlo methods; Particle scattering; Positron emission tomography; Solids; Testing;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference, 1994., 1994 IEEE Conference Record
Conference_Location :
Norfolk, VA
Print_ISBN :
0-7803-2544-3
DOI :
10.1109/NSSMIC.1994.474635
