Title :
3D attenuation correction for PET using uncollimated flood source transmission measurements
Author :
Hiltz, L.G. ; Harvey, P.J. ; Howse, D.C. ; McKee, B.T.A.
Author_Institution :
Queen´´s Univ., Kingston, Ont., Canada
Abstract :
A method is presented for attenuation correction for The Queen´s University 3-D PET (positron emission tomography) system using a flood source. Transmission data are coarsely binned into projections and the scatter contribution is subtracted. The emission data are not sorted into projections, so that these transmissions data are used to correct emission events at backprojection time either by direct calculation of the attenuation correction factors or by reconstruction of an attenuation image followed by reprojection. In this case, the latter method yields lower noise in the corrected emission image
Keywords :
computerised tomography; radioisotope scanning and imaging; 3D attenuation correction; Queen´s University 3D PET system; attenuation image; coarsely binned data; image reconstruction; medical diagnostic imaging; nuclear medicine; positron emission tomography; reprojection; uncollimated flood source transmission measurements; Attenuation measurement; Detectors; Filtering; Floods; High-resolution imaging; Image reconstruction; Imaging phantoms; Positron emission tomography; Scattering; Spatial resolution;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference, 1992., Conference Record of the 1992 IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-0884-0
DOI :
10.1109/NSSMIC.1992.301092
