SiPM-based ultrafast camera and imaging method thereof

Abstract

The invention discloses an SiPM-based ultrafast camera and an imaging method thereof. The invention belongs to the detector and photon imaging field. The ultrafast camera includes a crystal detector module, wherein the crystal detector module comprises a hysteresis comparison circuit used for comparing the amplitude of the forward signal with a preset threshold value, outputting a level signal ofa corresponding threshold value; a single event processing module used for detecting level signals according to high-level time, outputting an exposure start signal, meanwhile, acquiring a standard electric signal (accordant scintillation pulse) data set, carrying out time discrimination and position discrimination to generate coincidence lines, and packaging the coincidence lines into data framesto be sent out; a CCD type photon counting imaging system module used for controlling exposure start, receiving the converted digital signal and the coincidence line, reconstructing a processed image, displaying the processed image on the visual screen, comparing the amplitude of the forward signal with a preset threshold value, and outputting a level signal of the corresponding threshold value,so that the possibility of generating non-optimal imaging is reduced, and the setting time during nuclear imaging is shortened.

Description

technical field [0001] The invention relates to the field of detectors and photon imaging, in particular to a SiPM-based ultrafast camera and an imaging method thereof. Background technique [0002] At present, gamma camera imaging technology and systems play an important role in the research of many aspects of life science or biomedicine (such as genetics, genetics, etc.), especially in precision medicine and targeted diagnosis and treatment. It not only promotes the development of molecular biology and molecular medicine, but also promotes the progress of molecular imaging technology. With the help of molecular probes of pinhole γ-ray imaging, images of genes and metabolism in vivo can be obtained, which has important research significance for the observation and memory of the movement of specific molecules of drugs or cells. [0003] The common single-photon device in the prior art is a Gamma camera (Gamma Camera), which is a two-dimensional imaging device, and its struc...

AI Technical Summary

Problems solved by technology

[0006] In the current technical process, due to the limitations of the spatial resolution of MCP image intensifiers and CCD cameras and other devices and the influence of noise, the obtained gamma images are seriously degraded, and it is difficult to truly reflect the real spatial distribution of radiopharmaceuticals in small animals. The daily care process of verifying, maintaining and calibrating the camera is labor-intensive, and there are problems of long exposure time and low sensitivity of the camera

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