Abstract
In this study we investigate the use of dual energy transmission imaging, in simultaneous transmission-emission tomography. Transmission projection data are acquired using the two major photopeaks of 153Gd, at 44 keV and 99 keV. The degree of contamination of the data in the 44 keV window, by scattered 99 keV transmission photons, is investigated using Monte Carlo simulations. A new method is proposed to convert the two transmission maps measured at 44 keV and 99 keV to one appropriate for 99mTc. This transmission map is compared with one produced by scaling the 99 keV map, for the attenuation correction of 99mTc emission data. The use of dual energy transmission imaging is shown to improve the quantitative accuracy of the reconstructed emission maps. Dual energy transmission imaging is also shown to be more effective at visualizing areas of bone, particularly in truncated regions of the object.
Original language | English (US) |
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Pages | 1558-1562 |
Number of pages | 5 |
State | Published - 1995 |
Externally published | Yes |
Event | Proceedings of the 1994 Nuclear Science Symposium and Medical Imaging Conference. Part 1 (of 4) - Norfolk, VA, USA Duration: Oct 30 1994 → Nov 5 1994 |
Other
Other | Proceedings of the 1994 Nuclear Science Symposium and Medical Imaging Conference. Part 1 (of 4) |
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City | Norfolk, VA, USA |
Period | 10/30/94 → 11/5/94 |
ASJC Scopus subject areas
- Radiation
- Nuclear and High Energy Physics
- Radiology Nuclear Medicine and imaging