Radiation Detector Pixel Electrode Geometry for Stereoscopic Imaging
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Solution Overview
Problem
Radiographic images generated with slanted radiation irradiation suffer from blurring due to electric charges being collected across multiple pixels in the radiation detector, leading to reduced image quality in stereoscopic displays.
Innovation Solution
A radiographic imaging method and apparatus that adjust the imaging angle and detector specifications to ensure the thickness of the converting layer and pixel size satisfy the condition d ⋅ tan θ < k ⋅ p, where k is a constant of 1 or less, allowing electric charges from both the upper and lower surfaces to be collected by the same pixel electrode, thereby reducing blurring and enhancing stereoscopic image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If radiation is irradiated from a slanted direction to achieve stereoscopic imaging, then binocular parallax and depth perception are improved, but electric charges are collected across multiple pixels causing image blurring
Solution Approach 1:
The patent changes the geometric parameters of the imaging system by setting specific constraints on the incident angle θ and the converting layer thickness d relative to pixel size p. By satisfying the condition d·tan(θ) < k·p (where k≤1), the system maintains stereoscopic imaging capability while preventing charge leakage to adjacent pixels, thus resolving the contradiction between depth perception and image clarity.
2Productivity
If the converting layer thickness is increased to improve radiation detection efficiency, then more electric charges are generated, but charges from different depths are collected by different pixels causing increased blurring
Solution Approach 1:
The patent establishes a quantitative relationship between converting layer thickness d, incident angle θ, and pixel size p through the inequality d·tan(θ) < k·p. This parameter optimization allows the converting layer to be sufficiently thick for efficient radiation detection while ensuring that charges generated at different depths converge to the same pixel electrode, thereby maintaining image sharpness.
Solution Approach 2:
The patent creates an equipotential collection condition where electric charges generated at different positions within the converting layer (both upper and lower surfaces) are directed to the same pixel electrode. By controlling the electric field distribution through appropriate thickness and angle selection, the system ensures uniform charge collection across the converting layer depth, eliminating blurring while preserving detection efficiency.
3Measurement precision
If the incident angle is increased to enhance stereoscopic effect, then binocular parallax is improved, but charge collection spreads across multiple pixels reducing image quality
Solution Approach 1:
The patent optimizes the incident angle parameter θ by establishing it in relation to the converting layer thickness d and pixel size p through the condition d·tan(θ) < k·p. This allows the incident angle to be sufficiently large to provide stereoscopic depth perception while remaining small enough to ensure that electric charges from both upper and lower surfaces converge to the same pixel electrode, thus maintaining charge collection accuracy.
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 approach effectively reduces blurring and improves the quality of stereoscopic radiographic image displays by ensuring that electric charges are collected by the same pixel electrode, enhancing the depth perception and diagnostic suitability of the images.
Implementation Method 1
a converting layer 101 which converts radiation into electric charges
Data Source
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AI summary
[Problem] To reduce the blurring of radiographic images that arises from radiation a direction that is slanted with respect to the radiation detector being detected across a plurality of pixels in the radiation detector. [Solution] A radiation detector for detecting irradiated radiation that includes: a converting layer (101) for converting radiation irradiated from a radiation source capable of irradiating radiation from two imaging directions, which are different from each other, into electric charges; and a plurality of pixel electrodes (102a, 102b) for collecting the converted charges. In the radiation detector, when at least one of the two imaging directions forms a specified angle θ with respect to the direction that is orthogonal to the detector plane of the radiation detector, the thickness d of the converting layer (101) and the sizes p of the pixel electrodes (102a, 102b) satisfy the condition: d·tan θ < k·p (k is a constant of 1 or less).