Radiographic Imaging Apparatus Asynchronous Exposure Control
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Solution Overview
Problem
Radiographic imaging apparatuses struggle with capturing images at proper exposure when operating asynchronously with the radiation source due to the lack of synchronous signal lines, leading to ineffective automatic exposure control.
Innovation Solution
A radiographic imaging apparatus with a plurality of pixels configured to convert radiation to electrical signals and a control section that determines image capturing conditions based on these signals, allowing for asynchronous image capturing by calculating cumulative radiation dose and adjusting settings such as accumulation time, sensitivity, and number of images to ensure proper exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If synchronous signal lines are not connected between radiation source and imaging apparatus, then the system is easier to install and operate asynchronously, but automatic exposure control cannot be performed and images cannot be captured at proper exposure
Solution Approach 1:
The imaging apparatus detects radiation dose in real-time during radiation emission and uses this feedback to determine when to terminate image capturing. The control section monitors the detected dose against a predetermined threshold and automatically stops capturing when the threshold is reached, enabling automatic exposure control without synchronous signal lines.
Solution Approach 2:
The system uses its own radiation detection capability to self-regulate the image capturing process. The imaging apparatus independently monitors the radiation dose it receives and autonomously determines the optimal termination point for image capturing, without requiring external control signals from the radiation source.
2Manufacturing precision
If radiation dose detection is used to determine image capturing termination, then proper exposure can be achieved, but the system complexity increases due to additional detection and control mechanisms
Solution Approach 1:
The radiation detection pixels serve dual purposes: they function as part of the image sensor array for capturing radiographic images, and simultaneously act as radiation dose detectors for automatic exposure control. This multi-functionality eliminates the need for separate detection hardware, reducing overall system complexity while maintaining exposure accuracy.
Solution Approach 2:
The patent combines the image capturing function and radiation dose detection function into a single integrated sensor system. The control section merges the image data processing and exposure control logic into one unified control mechanism, simplifying the overall system architecture while achieving both imaging and dose monitoring objectives.
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 accurate and properly exposed image capture even when the radiation source and imaging apparatus operate asynchronously, improving the reliability of radiographic imaging systems.
Implementation Method 1
a plurality of pixels configured to convert radiation to electrical signals
Data Source
AI summary
A radiographic imaging apparatus includes a plurality of pixels configured to convert radiation to electrical signals and a control section configured to determine an image capturing condition based on the electrical signals converted by the pixels and to start image capturing.