Title :
Combined cone-beam and parallel-beam approach to SPECT
Author :
Krol, A. ; Salgado, R.B. ; Feiglin, D.H. ; Gangal, K.R. ; Hardikar, A.S. ; Thomas, F.D. ; Lipson, E.D. ; Bordikar, A. ; Coman, I.L.
Author_Institution :
Dept. of Radiol., SUNY Upstate Med. Univ., Syracuse, NY, USA
Abstract :
Each detector on a multi-headed gamma camera can be equipped with parallel-beam (PBC) or cone-beam collimators (CBC). While PBC can provide truncation-free SPECT projection sets, CBC offers increased sensitivity in a limited field-of-view (FOV). Combined PBC and CBC SPECT data acquisition may allow increased sensitivity within CBC FOV with significantly reduced truncation artifacts in the reconstructed images. In this paper the combined CBC&PBC SPECT method is evaluated using synthetic and experimental data. We envision application of CBC&PBC SPECT in scintimammography.
Keywords :
image reconstruction; mammography; medical image processing; single photon emission computed tomography; combined cone-beam and parallel-beam approach; cone-beam collimators; limited field-of-view; parallel-beam collimators; reconstructed images; scintimammography; sensitivity; truncation artifacts; truncation-free SPECT projection sets; Biomedical imaging; Cameras; Collimators; Data acquisition; Gamma ray detection; Gamma ray detectors; Image reconstruction; Imaging phantoms; Radiology; Single photon emission computed tomography;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2002 IEEE
Print_ISBN :
0-7803-7636-6
DOI :
10.1109/NSSMIC.2002.1239498
