A method and system for real-time processing of pulse accumulation events
A technology of pulse accumulation and real-time processing, applied in instruments, applications, echo tomography, etc., can solve the problems of asynchronous triggering, time-consuming iterative algorithm, deterioration of energy and position information accuracy, etc. The method is simple and efficient, and the effect of excellent recovery effect
A technology of pulse accumulation and real-time processing, applied in instruments, applications, echo tomography, etc., can solve the problems of asynchronous triggering, time-consuming iterative algorithm, deterioration of energy and position information accuracy, etc. The method is simple and efficient, and the effect of excellent recovery effect
CN105212954BActive Publication Date: 2018-03-16RAYCAN TECH CO LTD SU ZHOU
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[0051] The invention discloses a method for real-time processing of pulse accumulation events based on multi-voltage threshold sampling (Multi-voltage Threshold, referred to as MVT) technology. In the case of a higher rate, it can still achieve a better recovery effect of accumulating pulse information.
[0052] The scintillation pulse is generally considered to have a fast rising edge and a long-lasting falling edge. The fast rising edge contains the time information of the pulse, and the amplitude change of the entire pulse waveform contains the energy information of the pulse. Since the rising edge of each pulse still exists intact in most accumulation events, the data acquisition system only needs to complete the sampling of the rising edge of the pulse to determine whether the pulse appears and the corresponding time information; Therefore, for a specific detector and front-end electronics, its pulse mathematical model is relatively constant, and the information of the re...
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A method for real-time processing of pulse accumulation events, comprising the steps of: generating a fitted baseline value lookup table and a fitted energy value lookup table for pulse falling edges, using a multi-voltage threshold sampling method to complete the identification of piled-up pulses and the triggering of the pulse signal processing process ; Using the pulse prior information and the collected pulse information to obtain the information of the incorrectly sampled part due to the pulse accumulation in the form of a look-up table, the real-time recovery of the accumulated pulse information is completed. The present invention first uses the multi-voltage threshold sampling method to complete the recognition of the accumulation pulse at a high count rate and the triggering of the pulse signal processing process, and then uses the pulse prior information and the collected pulse information to obtain The information of the sampling part completes the real-time recovery of the accumulation pulse information. The method of the present invention is simple and efficient, and is easy to implement on a real-time data acquisition system at the detector level, and can still achieve better accumulation of pulse information recovery effect under the condition of low sampling rate.
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technical field [0001] The invention relates to the field of digital signal processing, in particular to a method and system for real-time processing of pulse accumulation events based on multi-voltage threshold sampling technology. Background technique [0002] In the field of high-energy particle detection and nuclear medical imaging fields such as Positron Emission Tomography (PET), it is necessary to complete the detection of gamma photon information. Usually, scintillation crystals are used to convert gamma photons into visible light photons, and then photoelectric conversion devices are used to detect gamma photons. It is converted into a scintillation pulse electrical signal, and finally the information corresponding to the gamma photon contained in the scintillation pulse electrical signal is extracted through a data acquisition circuit. [0003] Counting performance is one of the basic performance indicators of high-energy particle detectors, which reflects the limi...
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Patent Timeline
16 Mar 2018
Publication
CN105212954B
- IPC
- A61B6/02
- CPC
- G01T1/164; G01T1/29; G01T1/171; Y02D10/00; G01T1/161; A61B6/037; G01T1/1642; G01T1/1648
- Inventors
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