Accelerator dosage monitoring device, correction method and method for monitoring offset of accelerator target spot P

Abstract

The invention discloses an accelerator X-ray dosage monitoring device in an X-ray radiation imaging system. The X-ray radiation imaging system comprises an accelerator X-ray source, a collimator for collimating X rays and a detection probe. The X-ray dosage monitoring device comprises an X-ray dosage monitoring probe, wherein X-ray dosage measured by the detection probe is corrected according to the X-ray radiation dosage monitored by the X-ray dosage monitoring probe. The X-ray dosage monitoring probe is arranged on at lease one side of a collimating slit of the collimator and is used for monitoring the dosage of the X rays radiated from an accelerator; and by changing the positions of dosage monitoring points, the dosage monitoring probe is arranged on the collimator, the monitoring probe is close to an accelerator target spot and the dosage rate of the accelerator received by the monitoring probe is high, so that data has high statistic properties. Simultaneously normal beams are not blocked, so the statistic properties of probe data of the detection probe are not reduced.

Description

technical field [0001] The invention relates to the field of accelerator X-ray container radiation imaging inspection. Specifically, the present invention relates to an accelerator X-ray dose monitoring device in an X-ray radiation imaging system and an X-ray radiation imaging system having the above-mentioned accelerator X-ray dose monitoring device. In addition, the present invention also relates to a method for correcting the X-ray dose of the accelerator in the X-ray radiation imaging system. In addition, the present invention also relates to a method for monitoring the deviation of the accelerator target point P in the X-ray radiation imaging system. Background technique [0002] Accelerator X-ray sources are the most important ray sources in the field of container radiation imaging inspection. The X-rays produced by the accelerator have high average energy, flexible output dose and safe radiation protection. However, the output dose is not very stable and needs to be...

AI Technical Summary

Problems solved by technology

However, the statistics of the data measured by these two methods are not much superior to the statistics of the data detected at the main beam, that is, the area commonly used for index testing; because the dose at the far corner is much lower than the dose at the central beam , especially for high-energy accelerators, this situation is particularly obvious; while the penetration ion chamber is made very thick, although it can improve the statistics of the monitoring dose data to a certain extent, it also affects the effective output dose of the accelerator and its statistics.

The statistics of the monitoring dose data will be passed to the latter when correcting the detection dose data, which will affect the image quality

Images