Clock synchronization method and device for time calibration boards

Abstract

The invention provides a clock synchronization method and a device for time calibration boards, wherein the method is executed by anyone of to-be-synchronized time calibration boards; the method comprises the steps: a measuring clock for calibrating photon time is generated locally; in the unit clock period of the measuring clock, the clock receives a synchronous clock for performing clock synchronization among the time calibration boards, and position information of a rising edge of the synchronous clock in the unit clock period is calibrated; according to the position information, the phase difference between the measuring clock and the synchronous clock in the unit clock period is determined, and the phase difference is made to serve as a time compensation value; when the measuring clock calibrates the photon time in the unit clock period, the photon time is compensated through the time compensation value. According to the invention, the method and the device improve the accuracy of incident estimation.

Description

technical field [0001] The present application relates to medical imaging technology, and in particular, to a clock synchronization method and device between time calibration boards. Background technique [0002] In the imaging diagnosis technology in the medical field, a certain substance can usually pass through the scanned object, and the detection device receives the substance after passing through the scanned object, and the tissue of the scanned object can be reconstructed according to the received information of the substance. image, and diagnose the lesion of the scanned object according to the image. After the material information is received, the process of reconstructing the image according to the material information affects the efficiency of image reconstruction. For example, Positron Emission Tomograph (PET) system is an advanced molecular imaging diagnostic equipment in today's medical field. When PET is used for diagnosis, a deoxyglucose marker containing a ...

AI Technical Summary

Problems solved by technology

[0004] It can be seen that the clock synchronization between the time calibration boards is very important. Only when the clocks between the time calibration boards are synchronized can the receiving time of the photon be accurately measured, making the time coincidence judgment more accurate; otherwise, if the clocks between the boards are not synchronized, then it is possible Wrong time coincidence judgment results will be generated, such as determining a non-conformity event as a coincidence event, and errors in coincidence judgment will affect the quality of subsequent image reconstruction

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