Radiation Imaging Control Apparatus Adjusting Target Dose
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In radiation imaging, the use of automatic exposure control (AEC) without a grid for scattered ray reduction results in insufficient radiation doses, leading to decreased image quality due to the attenuation of radiation by the grid, making it difficult to obtain appropriate image quality when using scattered ray reduction processing without the grid.
Innovation Solution
A control apparatus and method that adjusts the target dose in automatic exposure control based on image processing parameters, specifically correcting the target dose to account for the radiation transmission rate of the grid, ensuring equal irradiation doses whether grid-based or grid-free scattered ray reduction processing is used, thereby maintaining image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If scattered ray reduction processing is used without a grid, then the radiation dose can be reduced, but the image quality deteriorates due to insufficient radiation dose reaching the detector
Solution Approach 1:
The patent changes the target dose parameter in automatic exposure control based on the image processing method being used. When scattered ray reduction processing is applied without a grid, the system adjusts the target dose parameter to a higher value to compensate for the lack of grid attenuation, ensuring sufficient radiation dose reaches the detector for maintaining image quality while still reducing overall radiation exposure compared to using a grid.
2Manufacturing precision
If a grid is used for scattered ray reduction, then image quality is maintained, but the radiation dose increases due to attenuation by the grid
Solution Approach 1:
The system dynamically adjusts the target dose parameter based on whether a grid is present and what image processing method is being used. The control apparatus modifies the exposure control parameters in real-time according to the imaging conditions, allowing optimization of radiation dose for each specific scenario - using higher target doses when grids are absent with scattered ray reduction processing, and lower target doses when grids are present.
3Ease of operation
If automatic exposure control uses a fixed target dose, then the control is simple, but the image quality varies when different image processing methods are used
Solution Approach 1:
The system implements feedback by having the control apparatus receive information about the image processing method being used and automatically adjust the target dose parameter accordingly. This closed-loop control ensures that the radiation dose is optimized for each specific processing scenario, maintaining consistent image quality across different processing methods while keeping the operation simple for the user.
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 ensures that radiation imaging is executed with appropriate radiation doses, preventing image quality deterioration by adjusting the target dose according to image processing parameters, ensuring equivalent irradiation amounts whether scattered ray reduction processing is used with or without the grid, thus maintaining diagnostic performance.
Implementation Method 1
primary radiation rectilinearly transmitted through the object
Implementation Method 2
scattered rays scattered by the object
Implementation Method 3
reduces the scattered rays entering the FPD by blocking, in front of the FPD, the scattered rays not traveling rectilinearly
Data Source
AI summary
A control apparatus that controls, using automatic exposure control of controlling a radiation generation apparatus by comparing a radiation dose from the radiation generation apparatus with a target dose, radiation imaging using radiation from the radiation generation apparatus, comprises a processing unit that executes image processing on a radiation image obtained by the radiation imaging; and a setting unit that sets, as the target dose used in the automatic exposure control, a dose which is changed in accordance with an image processing parameter for executing the image processing.