An X-ray detector with energy resolution and its detection method

Abstract

The present invention proposes an X-ray detector with energy resolution and its detection method. The detector includes from top to bottom: a front collecting electrode, a N + Doped layer, MAPbX for photoelectric conversion 3 Perovskite single crystal active material layer, P+ doped layer, rear collector electrode; MAPbX 3 The thickness of the perovskite single crystal active material layer is not less than 5mm; the front collecting electrode is connected to the positive electrode of the detector power supply; the rear collecting electrode is connected to the negative electrode of the detector power supply. In the detection method, different reverse bias voltages are applied to the detector in one X-ray exposure, and the detection signal currents of X-ray photons with different energies are extracted based on corresponding algorithms according to the detection currents under different bias voltages. The present invention (1) can realize X-ray detection with energy resolution capability and image subtraction of X-ray photon imaging with different energies; (2) only one X-ray exposure is required, which reduces the X-ray dose received by patients; ( 3) No additional contrast agent is needed, which reduces the toxic and side effects of patients.

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. [0002] technical background [0003] X-ray images have important applications in the fields of medical diagnosis, industrial flaw detection, and homeland security. [0004] 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 o...

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

Images