Radiographic Image Capture Device Using Sensor Ratio for Detection
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Solution Overview
Problem
Conventional radiographic image capture devices face challenges in detecting radiation with high precision, especially at lower irradiation levels, as they rely on difference data between adjacent detection elements, leading to decreased detection accuracy.
Innovation Solution
A radiographic image capture device employing a first sensor for radiographic image capture and a second sensor for radiation detection, using a ratio of values obtained by these sensors to determine radiation presence, with optional features like offset correction, fixed noise reduction, and summation of values to enhance precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If difference data between adjacent radiation detection elements is used for radiation detection, then the system can detect radiation initiation and termination, but the detection precision decreases as the irradiation amount of radiation becomes smaller
Solution Approach 1:
The radiation detector is divided into two independent sensor systems: a first sensor for radiographic image capture and a second sensor dedicated to radiation detection. This segmentation allows each sensor to be optimized for its specific function, with the second sensor providing accurate radiation detection independent of image capture requirements.
Solution Approach 2:
The patent introduces a ratio calculation mechanism that uses values from both the first sensor and second sensor as intermediaries to determine radiation presence. By comparing the ratio of these sensor values against threshold values, the system achieves accurate radiation detection without relying on difference data between adjacent elements.
2Measurement precision
If a radiation detector with dual sensors is implemented, then radiation detection precision is improved, but the device complexity increases
Solution Approach 1:
The first sensor serves dual purposes: it captures radiographic images for diagnostic purposes and simultaneously provides reference values for radiation detection by the second sensor. This multi-functionality reduces the need for completely separate systems while maintaining detection precision.
Solution Approach 2:
The patent combines the radiographic image capture function and radiation detection function into a single integrated detector assembly. Both sensors are positioned to receive radiation simultaneously, allowing the system to perform both functions with a unified structure rather than separate devices.
3Measurement precision
If ratio-based determination is used instead of difference data, then detection precision is maintained across all irradiation amounts, but the computational complexity increases
Solution Approach 1:
The system uses the first sensor's image capture data to automatically provide reference values for the ratio calculation. This self-service approach eliminates the need for external calibration or additional measurement systems, as the radiographic image data itself serves dual purposes including radiation detection reference.
Solution Approach 2:
The patent transforms the detection approach from using absolute difference values to using ratio-based parameters. By calculating the ratio between the first sensor values and second sensor values and comparing against threshold values, the system maintains detection precision across varying irradiation amounts while using computationally manageable operations.
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
Enables radiation detection with high precision irrespective of the irradiation amount by clearly distinguishing between sensor values, reducing noise influences, and avoiding unnecessary image capture due to improved detection accuracy.
Implementation Method 1
a first sensor for radiographic image capture
Implementation Method 2
a second sensor for radiation detection
Data Source
AI summary
A radiographic image capture device includes a radiation detector and a determination section. The radiation detector includes a first sensor for radiographic image capture and a second sensor for radiation detection. The determination section determines whether or not radiation has been detected by the radiation detector based on a ratio of a first value obtained by the first sensor to a second value obtained by the second sensor.