Direct-Conversion X-Ray Detector With Edge-Element Voltage Control
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Solution Overview
Problem
The characteristics of X-ray detection elements in the end portions of X-ray detectors are degraded compared to those in the central portions, affecting image quality in X-ray CT systems.
Innovation Solution
The X-ray detector is configured to exclude data from the end portions of the X-ray detection elements and apply different or equal voltages to these elements to prevent degradation, using dummy modules to maintain consistent electric field distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If X-ray detection elements are arranged in end portions to increase detection area, then the detection area is improved, but the detection characteristics are degraded
Solution Approach 1:
The patent applies different voltages to different regions of the X-ray detection elements. Specifically, a first voltage is applied to detection elements in end portions while a second voltage (different from the first) is applied to detection elements in other portions. This local differentiation of electrical conditions optimizes detection characteristics in each region, preventing the degradation that would occur if uniform voltage were applied across the entire detection area.
2Device complexity
If uniform voltage is applied to all X-ray detection elements, then the device complexity is reduced, but the detection characteristics in end portions are degraded
Solution Approach 1:
The patent implements local quality by applying different voltages to different spatial regions of the detection elements. The control unit provides a first voltage to detection elements in end portions and a second voltage to detection elements in other portions, optimizing detection characteristics locally while maintaining manageable system complexity through automated control.
Solution Approach 2:
The patent employs dynamic voltage adjustment by allowing the control unit to modify voltages applied to different detection elements based on their specific locations and operational requirements. This dynamic approach enables the system to adapt voltage conditions in real-time, improving detection characteristics without requiring permanent hardware modifications.
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
This configuration prevents degradation of X-ray detection elements in the end portions, ensuring consistent and high-quality image data generation.
Implementation Method 1
an X-ray detector of a direct conversion type in which a plurality of X-ray detection elements are arranged
Data Source
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AI summary
An X-ray detector (12, 72, 82) according to embodiments is an X-ray detector (12, 72, 82) of a direct conversion type in which a plurality of X-ray detection elements are arranged in a column direction and a channel direction. Electrodes (22, 23, 24, 52, 53, 62, 63) are provided for each detection element (21, 51, 61) to allow a voltage to be applied across each detection element (21, 51, 61). The X-ray detector includes a read circuit (27), connected to at least some of said electrodes (23, 24) configured to count X-ray photons detected by the X-ray detection elements for generation of image data. The read circuit (27) being configured to use, for generation of image data, data from the electrodes (23, 24), other than the electrodes (53, 63) at the end portions in at least one of the column direction and the channel direction of the X-ray detection elements (21, 51, 61).