Baseline correction method and system for digitized scintillation pulses

Abstract

A method and system for correcting a baseline of a digitized scintillation pulse. In the method, firstly performing time axial sampling on scintillation pulse signals using a multi-threshold voltage sampling method to obtain time-threshold sampling points of a scintillation pulse waveform; then selecting these time-threshold sampling points, reconstructing a pulse waveform and identifying a model parameter using a shape characteristic of the scintillation pulse, and estimating a baseline shift mean value of the scintillation pulse according thereto; and finally correcting the baseline of the scintillation pulse waveform according to the baseline shift mean value. Also disclosed is a system for correcting a baseline of a digitized scintillation pulse, comprising a digital sampling module, a baseline offset calculation module and a baseline correction module. The present invention can effectively and accurately screen the baseline drift of a scintillation pulse, realizing rapid and real-time self-adaptive correction of a baseline, and improving the signal-to-noise ratio of a scintillation pulse data measurement result and the stability of a data acquisition system.

Description

technical field [0001] The invention belongs to the field of high-energy physical detectors and signal processing, and in particular relates to a baseline correction method and system for digital scintillation pulses, which can be applied to high-energy particle detection and medical imaging equipment. Background technique [0002] In most fields of high-energy particle detection and medical imaging equipment, the scintillation pulses collected and processed by the data acquisition system are usually converted by scintillation crystals to high-energy particles (such as: x-rays, γ-rays, etc.) Converted into an electrical pulse signal that can be measured, the typical scintillation pulse waveform in the prior art is as figure 1 shown. In the information extraction of scintillation pulses, due to the influence of detector leakage current, scintillation pulse tailing, noise interference and other factors, scintillation pulses are often superimposed on an unstable baseline. Thi...

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Problems solved by technology

[0006] In view of this, the object of the present invention is to provide a baseline correction method and system for digital scintillation pulses, which are used to solve the problem of high-energy physical particle detection and front-end electronics baseline drift in medical imaging equipment

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