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Recently, there is growing interest in directly digitizing the scintillation pulses in PET detectors. With digital pulse samples, in principle one can apply nontrivial signal analysis software algorithms to either yield better detection performance or more flexibility in detector design. Previously, we have proposed the MVT method for direct scintillation pulse sampling and developed several kinds...
Based on the multi-voltage threshold (MVT) method, we have proposed the FPGA-only implementation for positron emission tomography (PET) detectors. It realizes required comparators and time-to-digital convertors (TDCs) on FPGAs. Thus, its performance can be easily enhanced by optimizing the inside algorithm without hardware modifications or improved with the development of FPGA technologies. In this...
Nowadays, time-of-flight (TOF) PET detectors and systems are becoming increasingly common since scintillators, photodetectors and electronics has made significant progress. It has been well recognized that TOF PET imaging can increase the image signal-to-noise ratio (SNR) and yield other benefits; and the degree of these enhancements is higher as the timing resolution improves. Previously we have...
As digital signal has abilities like immunity for transmit distortion and feasibility to calibrate, digital architecture that samples the event waveform at the earliest possible stage shows promising potential for building next generation PET system. Multi-voltage threshold (MVT) is a digital sampling method that take time samples when pulses cross predefined thresholds and extracts event information...
The all digital PET system is attracting more and more attentions due to its flexibility, scalability, reusability and upgradability. Based on the Trans-PET formerly developed by us, we are trying to fulfill online parameter calibration of the all digital PET system. The ability of thorough and quick online parameter calibration will make the system well adaptive to application variation, environment...
Emerging and blooming internet of things (IOT) technology greatly affects backbone network development. The effects are not accurately tested or predicted yet. As a trial, some traffic characteristics profiling cases are investigated based on a gateway in IOT (IOTGW), a classical device, for data communication between IOT and backbone networks. From this investigation, some lessons of IOT effects...
Modular detectors have attracted extensive attention in position emission tomography (PET) system design. Various detector system layouts can be constructed from modular detectors to match the different performance requirements from different applications. In the modular detector design, the lightguide or the fiber is commonly used to construct large continuous arrays to eliminate the gaps introduced...
In positron emission tomography (PET) applications, coincidence timing resolution is crucial for rejecting random events, while the extremely high timing resolution can be used for time-of-flight (TOF) reconstruction. The timing resolution of PET system is determined by many factors, including the scintillator crystal, the photomultiplier (PMT) and the data acquisition system. Many efforts have been...
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