ArticleIEEE transactions on radiation and plasma medical sciences2017
A Time-Walk Correction Method for PET Detectors Based on Leading Edge Discriminators.
Article in IEEE transactions on radiation and plasma medical sciences, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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10 citing papers in PubMed.
- High-Speed Detection of X-ray Pulses Using a Digital Counter Coupled with Perovskite Composite Scintillators.ACS applied materials & interfaces · 2026Article
- A Sensor Employing an Array of Silicon Photomultipliers for Detection of keV Ions in Time-of-Flight Mass Spectrometry.Sensors (Basel, Switzerland) · 2025Article
- A Time-Walk and Timing-Shift Correction Method for Dual-Ended Readout TOF-DOI PET Detectors.IEEE transactions on radiation and plasma medical sciences · 2025Article
- Development of Whole-Body TOF-DOI PET Detector Using Dual-Ended Readout Method.IEEE transactions on instrumentation and measurement · 2025Article
- Cross-Detection for Bubble-free Thermometer Codes and Dual-Side Monitoring for FPGA-Based High-Accuracy and High-Precision Time-to-Digital Converters.IEEE transactions on instrumentation and measurement · 2025Article
- Study of optical reflectors for a 100ps coincidence time resolution TOF-PET detector design.Biomedical physics & engineering express · 2021Article
- Optical Simulation and Experimental Assessment with Time-Walk Correction of TOF-PET Detectors with Multi-Ended Readouts.Sensors (Basel, Switzerland) · 2021Article
- Mini EXPLORER II: a prototype high-sensitivity PET/CT scanner for companion animal whole body and human brain scanning.Physics in medicine and biology · 2019Article
- Influence of Time-Pickoff Circuit Parameters on LiDAR Range Precision.Sensors (Basel, Switzerland) · 2017Article
- Evaluation of Matrix9 silicon photomultiplier array for small-animal PET.Medical physics · 2015Article
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Authors and funding
6 authors.
Funding
Abstract
The leading edge timing pick-off technique is the simplest timing extraction method for PET detectors. Due to the inherent time-walk of the leading edge technique, corrections should be made to improve timing resolution, especially for time-of-flight PET. Time-walk correction can be done by utilizing the relationship between the threshold crossing time and the event energy on an event by event basis. In this paper, a time-walk correction method is proposed and evaluated using timing information from two identical detectors both using leading edge discriminators. This differs from other techniques that use an external dedicated reference detector, such as a fast PMT-based detector using constant fraction techniques to pick-off timing information. In our proposed method, one detector was used as reference detector to correct the time-walk of the other detector. Time-walk in the reference detector was minimized by using events within a small energy window (508.5 - 513.5 keV). To validate this method, a coincidence detector pair was assembled using two SensL MicroFB SiPMs and two 2.5 mm × 2.5 mm × 20 mm polished LYSO crystals. Coincidence timing resolutions using different time pick-off techniques were obtained at a bias voltage of 27.5 V and a fixed temperature of 20 °C. The coincidence timing resolution without time-walk correction were 389.0 ± 12.0 ps (425 -650 keV energy window) and 670.2 ± 16.2 ps (250-750 keV energy window). The timing resolution with time-walk correction improved to 367.3 ± 0.5 ps (425 - 650 keV) and 413.7 ± 0.9 ps (250 - 750 keV). For comparison, timing resolutions were 442.8 ± 12.8 ps (425 - 650 keV) and 476.0 ± 13.0 ps (250 - 750 keV) using constant fraction techniques, and 367.3 ± 0.4 ps (425 - 650 keV) and 413.4 ± 0.9 ps (250 - 750 keV) using a reference detector based on the constant fraction technique. These results show that the proposed leading edge based time-walk correction method works well. Timing resolution obtained using this method was equivalent to that obtained using a reference detector and was better than that obtained using constant fraction discriminators.
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