X-ray detector with energy resolution, and detection method of X-ray detector

Abstract

The invention proposes an X-ray detector with energy resolution, and a detection method of the X-ray detector. The detector sequentially comprises a front collection electrode, an N+ doped layer, an MAPbX3 perovskite monocrystalline active material layer for photoelectric conversion, a P+ doped layer and a rear collection electrode from the top to the bottom. The thickness of the MAPbX3 perovskitemonocrystalline active material layer is not less than 5mm. The front collection electrode is connected with the positive electrode of a detector power supply. The rear collection electrode is connected with the negative electrode of the detector power supply. The detection method comprises the steps: applying different reverse bias voltages to the detector in one X-ray exposure operation, and extracting the detection signal currents of X-ray photons with different energy values based on a corresponding algorithm according to the detection currents under different bias voltages. The detectorand method can achieve the beneficial effects that (1), the detector and method achieve the X-ray detection with the energy resolution capability and the image subtraction of X-ray photon imaging withdifferent energy values; (2), the detector and method just need one X-ray exposure operation, thereby reducing the dosage of X-ray on a patient; (3), the detector and method do not need an additionalcontrast agent, and reduce the toxic and side effect on the patient.

Description

Technical field [0001] The invention relates to an X-ray detector and a detection method thereof, in particular to an X-ray detector with energy resolution and a detection method thereof. technical background [0002] X-ray images have important applications in the fields of medical diagnosis, industrial flaw detection, and homeland security. [0003] On the one hand, conventional X-ray digital detection has two types: indirect detection and direct detection. In indirect X-ray detection, X-ray photons are first incident on a scintillator made of inorganic materials. The scintillator converts the energy of the X-ray photons into visible light photons, and then uses a silicon-based CCD or CMOS image sensor to receive the visible photon signal Perform imaging. In this working mode, the electrical signal obtained by the detector cannot directly distinguish the energy of X-ray photons. Direct X-ray detection does not require scintillators. X-ray photons are directly incident on activ...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the energy spectrum of the high and low energy rays obtained by the filter is not very distinguishable, so there is a large error in the reconstruction result, which is called "pseudo-dual-energy" imaging

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