Abstract
We have built a dedicated PET system for breast cancer patient imaging. The modular detector is composed of a 9×9 array of 3×3×20 mm LSO scintillator crystals coupled to an optical fiber taper, which in turn is coupled to a Hamamatsu R5900-C8 position-sensitive photomultiplier tube. Two modules have been characterized with the following results: average intrinsic spatial resolution = 2.26 mm, average energy resolution = 19.5% at 511 keV, coincidence time resolution = 2.4 ns, and detector efficiency = 53% using a 350 keV energy threshold. To create the maxPET system, we have tiled 50 of these modular detectors into 5×5 arrays forming two parallel detector plates measuring 15cm × 15cm. Using a multiplexed sector readout scheme we have obtained singles flood histograms allowing identification of >90% of the 2025 crystals in each plate without any optimization. We are in the process of improving the crystal look-up tables and will fully characterize the complete imaging system. The data is acquired in projection mode or by rotating the plates to obtain tomographic datasets. The promising results from the individual detector modules support the feasibility of developing a high resolution, high sensitivity dedicated PET system for breast cancer applications.
| Original language | English (US) |
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| Title of host publication | IEEE Nuclear Science Symposium and Medical Imaging Conference |
| Editors | D. Merelli, J. Surget, M. Ulma |
| Volume | 3 |
| State | Published - Dec 1 2000 |
| Event | 2000 IEEE Nuclear Science Symposium Conference Record - Lyon, France Duration: Oct 15 2000 → Oct 20 2000 |
Other
| Other | 2000 IEEE Nuclear Science Symposium Conference Record |
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| Country/Territory | France |
| City | Lyon |
| Period | 10/15/00 → 10/20/00 |
ASJC Scopus subject areas
- Computer Vision and Pattern Recognition
- Industrial and Manufacturing Engineering