Coincidence imaging using a standard dual head gamma camera
- 24 December 2002
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- Vol. 2 (10823654) , 1127-1131
- https://doi.org/10.1109/nssmic.1996.591591
Abstract
Coincidence electronics and a data acquisition system were developed to explore coincidence detection using a conventional dual head gamma camera. A high impedance pick-off circuit provides position and energy signals without interfering with normal camera operation. The signals are pulse-clipped to reduce pileup effects. Thin lead-tin-copper filters are used to reduce the flux of low energy photons to the detectors. The data are stored in list mode format. The measured coincidence timing resolution for the system is 9 nsec FWHM (450 kcps/detector) and the energy resolution is 11% (650 kcps/detector). The system sensitivity is 46 kcps//spl mu/Ci/cc for a 20 cm diameter (18 cm length) cylindrical phantom centered in the field of view. A scatter fraction of 31% was measured using the 20 cm cylindrical phantom. The sensitivity and scatter fraction measurements were made using a 450-575 keV energy window, 63.0 cm detector spacing, and 1 mm thick lead filters. The maximum recommended singles rate (full spectrum) for coincidence imaging is /spl sim/800 kcps per detector. The 3D reprojection algorithm has been implemented. Example images of the 3D Hoffman brain phantom and patient tumor images are shown.Keywords
This publication has 9 references indexed in Scilit:
- A data acquisition system for coincidence imaging using a conventional dual head gamma cameraPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Performance of a dual headed SPECT system modified for coincidence detectionPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Performance characteristics of a dual head SPECT scanner with PET capabilityPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Investigation of the performance of the General Electric ADVANCE positron emission tomograph in 3D modeIEEE Transactions on Nuclear Science, 1996
- A new clinical scintillation camera with pulse tail extrapolation electronicsIEEE Transactions on Nuclear Science, 1990
- Analytic 3D image reconstruction using all detected eventsIEEE Transactions on Nuclear Science, 1989
- Increased sensitivity and field of view for a rotating positron cameraPhysics in Medicine & Biology, 1984
- Use of Position Sensitive Detectors in Positron ImagingIEEE Transactions on Nuclear Science, 1980
- Performance Parameters of a Positron Imaging CameraIEEE Transactions on Nuclear Science, 1976