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Performance assessment of a software-based coincidence processor for the EXPLORER total-body PET scanner
Edwin K Leung1,2,3, Martin S Judenhofer1, Simon R Cherry1,2
1Department of Biomedical Engineering, University of California, Davis, One Shields Avenue, Davis, CA 95616, United States of America.
Physics in Medicine and Biology
|August 29, 2018
Summary
Post-acquisition processing of positron emission tomography (PET) singles data on the EXPLORER scanner is feasible. Faster data storage, like PCIe SSDs, significantly improves processing speed for PET imaging.
Area of Science:
- Medical Imaging
- Nuclear Medicine
- Computer Science
Background:
- Positron Emission Tomography (PET) coincidence processing is usually performed during data acquisition.
- The EXPLORER total-body PET scanner allows for storage of unpaired single events (singles) for post-acquisition processing.
Purpose of the Study:
- To develop and assess a software-based coincidence processor for the EXPLORER PET scanner.
- To evaluate the impact of data storage types on post-acquisition processing performance.
Main Methods:
- Developed a software-based coincidence processor for PET data.
- Assessed processor performance using different data storage solutions (PCIe SSD vs. RAID 6 HDD).
- Evaluated processing capabilities with varying numbers of computer nodes and parallel data file processing.
Main Results:
- Data storage type significantly impacts coincidence processing performance, especially with parallel processing.
- A single computer node with a PCIe SSD can process ~120 M singles/sec at an incoming rate of ~150 Mcps.
- Utilizing two computer nodes enables near real-time coincidence processing at this high singles rate.
Conclusions:
- Post-acquisition coincidence processing for PET is viable on the EXPLORER scanner.
- Optimized data storage and computational resources are crucial for efficient PET data processing.
- Near real-time processing is achievable with adequate hardware configurations.
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