Radiographic Imaging Device with Alterable Pixel Characteristics
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Solution Overview
Problem
Radiographic imaging devices face challenges in accurately detecting radiation irradiation states, particularly when only a portion of the imaging region is used or when capturing video versus still images, leading to pixel saturation or low signal-to-noise ratios due to fixed pixel characteristics.
Innovation Solution
A radiographic imaging device with alterable radiation detection pixel characteristics, including amplification ratios, binning states, and low-pass frequencies, which are set based on acquired imaging conditions to optimize radiation detection and image acquisition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If fixed pixel characteristics are used for radiation detection, then device structure is simple, but radiation detection accuracy deteriorates when imaging conditions change
Solution Approach 1:
The patent applies the dynamics principle by making pixel characteristics alterable rather than fixed. The radiation detection pixels can dynamically adjust their characteristics (such as amplification ratios, binning states, and low-pass frequencies) based on acquired imaging conditions. This allows the system to adapt to different imaging scenarios (still images vs. video, different body parts) to maintain optimal radiation detection accuracy without requiring multiple fixed detector configurations.
Solution Approach 2:
The patent implements parameter changes by modifying the operational parameters of radiation detection pixels based on imaging conditions. Specifically, the system changes parameters such as amplification ratios, binning states, and low-pass frequencies according to the detected imaging conditions. This enables the same physical detector to achieve different detection characteristics for various imaging applications, resolving the contradiction between detection accuracy and device complexity.
2Measurement precision
If only a portion of imaging region is used, then imaging target can be focused, but pixel saturation occurs due to fixed characteristics
Solution Approach 1:
The patent applies local quality by enabling different regions of the imaging detector to have different characteristics based on local imaging conditions. When only a portion of the imaging region is used, the system can adjust the characteristics of pixels in that specific region (such as amplification ratio and binning state) to optimize radiation amount detection for that localized area, preventing saturation while maintaining focus on the imaging target.
Solution Approach 2:
The system dynamically adjusts pixel characteristics based on real-time imaging conditions. When a specific region is selected for imaging, the characteristics of pixels in that region are altered to match the imaging requirements, allowing flexible adaptation to different imaging scenarios without fixed characteristic limitations.
3Measurement precision
If fixed pixel characteristics are used, then manufacturing is simple, but signal-to-noise ratio becomes low under varying imaging conditions
Solution Approach 1:
The patent changes operational parameters (amplification ratios, binning states, low-pass frequencies) of radiation detection pixels based on imaging conditions to optimize signal-to-noise ratio. By adjusting these parameters dynamically, the system maintains high signal-to-noise ratio across different imaging scenarios while using a single detector design, effectively managing the trade-off between manufacturing simplicity and measurement precision.
Solution Approach 2:
The system incorporates feedback mechanisms where imaging conditions are detected and used to adjust pixel characteristics accordingly. This feedback loop ensures that the signal-to-noise ratio is maintained at optimal levels by continuously adapting detector characteristics to current imaging requirements, resolving the contradiction between fixed manufacturing and variable performance requirements.
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 allows for more accurate detection of radiation irradiation states and improved image quality by adapting pixel characteristics to specific imaging conditions, reducing saturation and enhancing signal-to-noise ratios.
Implementation Method 1
a plurality of radiation detection pixels that detect irradiated radiation by respectively converting irradiated radiation to charges and accumulating the charges
Implementation Method 2
the radiation image acquisition pixels acquiring image information representing the radiation image by respectively converting irradiated radiation to charges and accumulating the charges
Data Source
AI summary
A radiographic imaging device that may detect irradiation states of radiation is provided. Pixels for radiation detection that are provided in a radiation detector of an electronic cassette are configured with characteristics thereof being alterable. The characteristics are set in accordance with the imaging conditions of a radiation image by a cassette control section of the electronic cassette.