Radiation Detector Signal Processing for Scattered X-Ray Interference
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Solution Overview
Problem
Existing radiation detection and imaging systems face interference from scattered X-rays when detecting objects with large mass thickness, leading to reduced substance discrimination capability and the need for increased X-ray energy or dose.
Innovation Solution
A radiation detection apparatus comprising a radiation detector, a high-speed Analog-to-Digital Converter (ADC), and a data processor that determines the number of single photon signals from waveform data, selecting between integral and count signals for imaging based on this number to improve detection and recognition capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the energy of incident rays or X-ray dose is increased to guarantee detection effect for objects with large mass thickness, then detection capability is improved, but radiation dose to the object increases
Solution Approach 1:
The patent changes the parameter of signal processing method by switching between integral mode and count mode based on the number of single photon signals. This allows optimal detection for different mass thicknesses without increasing radiation dose, resolving the contradiction between detection capability and radiation dose.
Solution Approach 2:
The system dynamically adjusts the signal processing mode (integral or count) based on real-time detection of single photon signal counts. This dynamic adaptation enables the system to maintain high detection capability across varying object thicknesses while minimizing radiation exposure.
2Measurement precision
If integral signal is used for imaging objects with large mass thickness, then detection capability is improved, but scattered X-ray interference increases
Solution Approach 1:
The system dynamically selects between integral signal processing and count signal processing based on the detected number of single photon signals. For objects with large mass thickness where scattered X-rays are prevalent, the system switches to count mode which is less susceptible to scattered radiation interference, thereby maintaining detection capability while reducing the impact of scattered X-ray interference.
Solution Approach 2:
The patent changes the signal processing parameter from integral mode to count mode based on the mass thickness characteristics inferred from single photon signal counts. This parameter change allows the system to optimize detection while minimizing the harmful effects of scattered radiation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The apparatus enhances the quality of radiation detection imaging for objects with different mass thicknesses by selectively using integral or count signals, thereby improving detection and recognition capabilities while reducing the need for increased X-ray doses.
Implementation Method 1
a radiation detector which generates an electrical signal by interacting with X-rays
Data Source
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AI summary
A radiation detection apparatus and method, and a data processing method and processors (103, 303, 505), relating to the technical field of radiation detection. The radiation detection apparatus comprises: a ray detector (101); a high-speed ADC (102, 302, 403, 500) connected to the ray detector (101); and a data processor (103, 303, 505) connected to the high-speed ADC (102, 302, 403, 500); the ray detector (101) converts an optical signal produced after X-ray transmission and the action of a scintillator into an electrical signal; the high-speed ADC (102, 302, 403, 500) acquires waveform data by means of electrical signal waveform sampling; on the basis of the waveform data, the data processor (103, 303, 505) determines the number of single photon signals, and then determines to use integrated signals and/or count signals for imaging. The apparatus can use the single photon detection capability of the detector (101) to determine the number of single photon signals on the basis of waveform data, and then determine to use waveform data integrated signals and/or count signals for imaging, thereby improving the radiation detection imaging quality of a detected object, and enhancing the penetration index and substance distinguishing capability of the system.