Radiographic System Automatic Exposure Control Signal Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing radiographic systems face challenges in automatic exposure control (AEC) due to differences in specifications between X-ray generators and imaging apparatuses, leading to difficulties in connecting and setting optimal radiographing conditions, which can result in lower image quality and operational complexities.
Innovation Solution
A radiographic system that includes an information acquiring part to determine the installation convenience preference type and a switching part to selectively switch between detection signals and irradiation stop signals based on the acquired type, allowing for flexible AEC suitable for different installation scenarios, including the use of a converter to relay signals between the source controller and the radiological image detector.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the radiographic system uses fixed AEC signal exchange methods with specific interface specifications, then the system has standardized control flow, but it becomes difficult to connect X-ray generators and imaging apparatuses from different manufacturers and set optimal radiographing conditions
Solution Approach 1:
The system dynamically switches between two AEC signal exchange modes (detection signal mode and irradiation stop signal mode) based on the connection type between X-ray generator and imaging apparatus. This dynamic adaptability allows the system to accommodate different manufacturer specifications while maintaining standardized operation, resolving the contradiction between versatility and complexity.
Solution Approach 2:
The system changes the operational parameters of the AEC signal exchange by selecting different modes (detection signal with threshold comparison vs. direct irradiation stop signal). This parameter change enables compatibility across different equipment specifications without increasing overall system complexity, as the switching logic is standardized.
2Ease of operation
If the system uses detection signal exchange with threshold comparison, then flexible radiographing conditions can be set, but the system requires more complex signal processing and integration
Solution Approach 1:
The system dynamically selects the AEC signal exchange mode based on operational requirements. When flexible radiographing conditions are needed, it uses detection signal mode with threshold comparison; when simplicity is prioritized, it uses irradiation stop signal mode. This dynamic selection balances operational flexibility with processing complexity.
3Device complexity
If the system uses irradiation stop signal exchange, then the control flow is simplified, but the ability to optimize radiographing conditions is reduced
Solution Approach 1:
The system dynamically switches between AEC modes to balance control simplicity and optimization capability. The irradiation stop signal mode provides simplified control flow when used, while the detection signal mode enables condition optimization when needed. The standardized switching mechanism ensures this balance is achieved without increasing overall system complexity.
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 enables flexible and situation-specific AEC, improving image quality and simplifying system operation by allowing the radiological image detector to determine the optimal output format for automatic exposure control signals, thereby enhancing the compatibility and efficiency of radiographic systems across different installations.
Implementation Method 1
a sensor such as an ion chamber (ionization chamber) detecting an X-ray dose passing through an object
Implementation Method 2
pixels accumulating signal charges corresponding to an amount of incident X-rays
Data Source
AI summary
A storage and search unit of a console acquires a source ID of an X-ray source and searches for and extracts a type corresponding to the acquired source ID from source information of a storage device. In the case of an installation convenience preference type in which convenience in connection between a source controller and an electronic cassette is preferred, a detection signal from a detection pixel of an FPD of the electronic cassette is output from a detection signal I/F of the electronic cassette to a detection signal I/F of the source controller. In the case of an installation convenience non-preference type, an irradiation stop signal based on the comparison result of the integrated value of the detection signal from the detection pixel with an irradiation-stop threshold is output from an irradiation signal I/F of the electronic cassette to an irradiation signal I/F of the source controller.