Radiation Imaging Offset Correction Adaptive Timing
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Solution Overview
Problem
Current radiation imaging systems face challenges in achieving accurate and timely offset correction, particularly during startup when offset fluctuations are high, leading to longer times from radiation exposure to image display.
Innovation Solution
A radiation imaging apparatus and method that dynamically switch between two offset correction timing modes based on the stability of offset images, using either an offset image obtained after or before the radiation image, depending on an evaluation value, to maintain accuracy and reduce the time to image display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If offset correction is performed using an offset image obtained after radiation exposure, then offset correction accuracy is maintained, but the time from radiation exposure to image display increases
Solution Approach 1:
The patent applies dynamics by making the offset image acquisition timing adaptive rather than fixed. The system dynamically switches between acquiring offset images before radiation exposure (when offset is stable) and after radiation exposure (when offset may have changed), based on real-time evaluation of offset stability. This dynamic adjustment resolves the contradiction by selecting the optimal timing in each situation.
Solution Approach 2:
The patent changes the parameter of offset image acquisition timing based on the stability evaluation result. When offset stability is high, the system uses pre-exposure offset images to minimize delay. When offset stability is low, it switches to post-exposure offset images to maintain correction accuracy. This parameter change strategy allows the system to adapt to different operational conditions.
2Loss of time
If offset correction is performed using an offset image obtained before radiation exposure, then the time from radiation exposure to image display is shortened, but offset correction accuracy deteriorates when offset fluctuates
Solution Approach 1:
The patent implements feedback by continuously evaluating offset stability and using this information to control the offset image acquisition timing. The evaluation result feeds back into the decision-making process, allowing the system to adjust its behavior based on actual offset conditions. This feedback mechanism ensures that pre-exposure offset images are only used when stability is confirmed, preventing accuracy deterioration.
3Measurement precision
If offset images are acquired periodically regardless of stability, then offset correction can be performed, but the instantaneousness of radiation exposure instruction is compromised
Solution Approach 1:
The patent applies preliminary action by evaluating offset stability in advance and preparing the appropriate offset image acquisition strategy before radiation exposure. This allows the system to make informed decisions about timing without compromising the instantaneousness of exposure instructions, as the evaluation and decision process occurs independently and in advance.
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 high-accuracy offset correction while significantly shortening the time from radiation exposure to image display, even during apparatus startup, by adaptively managing offset image acquisition and correction timing.
Implementation Method 1
a photoelectric conversion circuit in which a plurality of photoelectric conversion elements that convert radiation into an electric signal are arrayed in a matrix
Data Source
AI summary
A radiation imaging apparatus performs radiation image obtaining processing in accordance with an exposure instruction, and obtains a radiation image. Then the radiation imaging apparatus performs offset correction for the obtained radiation image, and displays it. The radiation imaging apparatus determines, in accordance with a predetermined criterion, whether or not offset images obtained by offset image obtaining processing are stable over time. Then, if it is determined that the offset images are not stable, offset correction is performed by using an offset image obtained by performing offset image obtaining processing, following the obtaining of the radiation image. If it is determined that the offset images are stable, the offset correction is performed by using an offset image obtained before the obtaining of the radiation image.