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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Penney, B.C. Rajeevan, N. Bushe, K.S. Hademenos, G. King, M.A. de Vries, D.J. Moore, S.C. |
| Copyright Year | 1991 |
| Description | Author affiliation: Dept. of Nucl. Med., Massachusetts Univ. Med. Center, Worcester, MA, USA (Penney, B.C.; Rajeevan, N.; Bushe, K.S.; Hademenos, G.; King, M.A.) |
| Abstract | Measurements from water-filled phantoms were used to adapt the dual photopeak window scatter correction method to In-111 imaging. The ratio of the counts in a 226-246-keV window to those in a 247-274-keV window was found to correlate well (r=0.99) with a scatter fraction measure for a 226-274-keV window. To apply this dual photopeak window method to the 171-keV peak, the scatter spill-down from the 247-keV peak was estimated using an image recorded with a 195-225-keV window. This image was blurred and scaled to estimate more accurately the spill-down into each of the two 171 -keV photopeak windows, the scaling and blurring being estimated using Monte Carlo simulations for average scatter and blurring conditions. These estimated spill-down images were subtracted from the two 171-keV photopeak windows (160-170 and 171-184 keV, respectively). The ratio of the remaining counts in the 160-170 keV window to those in the 171-184 keV window correlated well. (r=0.975) with a scatter fraction measure in the 171-keV peak. Pixel-by-pixel application of the method to point source images reduced global measures of the scatter fraction magnitude by an average factor of 6.8 for the 171-keV photopeak and by an average factor of 5.7 for the 247-keV photopeak. |
| Starting Page | 1866 |
| Ending Page | 1873 |
| File Size | 755020 |
| Page Count | 8 |
| File Format | |
| ISBN | 0780305132 |
| DOI | 10.1109/NSSMIC.1991.259239 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 1991-11-02 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Electromagnetic scattering Particle scattering Biomedical measurements Pixel Biomedical imaging Energy resolution Detectors Cancer Nuclear medicine Biomedical engineering |
| Content Type | Text |
| Resource Type | Article |
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