Radiation Imaging Apparatus Dose Measurement Accuracy
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Solution Overview
Problem
Existing radiation imaging apparatuses inaccurately measure the integrated dose of radiation due to the exclusion of composition signals obtained before the start of irradiation, leading to degraded measurement accuracy, especially when imaging with high-intensity radiation for short durations.
Innovation Solution
A radiation imaging apparatus with a control unit that outputs a composition signal from multiple detection units to detect the start of irradiation, then acquires individual signals from these units to calculate the integrated dose based on signal components, improving measurement accuracy by incorporating pre-irradiation signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If composition signals obtained before the start of irradiation are excluded from integrated dose measurement, then the measurement process is simplified, but the measurement accuracy is degraded
Solution Approach 1:
The patent applies preliminary action by detecting and storing composition signals before the actual irradiation starts. The system uses a start-of-irradiation detection unit to identify when radiation begins, and an integrated dose measurement unit that incorporates pre-irradiation composition signals into the final measurement. This allows the system to capture radiation data from the moment composition signals are generated, rather than waiting for irradiation to officially start, thereby improving measurement accuracy without significantly complicating the overall process
Solution Approach 2:
The patent implements feedback by using the start-of-irradiation detection unit to monitor composition signals in real-time and provide feedback to the integrated dose measurement unit. When the detection unit identifies that irradiation has started based on composition signal thresholds, it triggers the measurement unit to begin incorporating signals. This feedback mechanism ensures that no radiation data is missed while maintaining a streamlined measurement process
2Measurement precision
If composition signals are used to detect the start of irradiation and then incorporated into dose measurement, then the measurement accuracy is improved, but the processing complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the radiation detection system into distinct functional units: a composition signal acquisition unit, a start-of-irradiation detection unit, and an integrated dose measurement unit. Each unit has a specific function, and the segmentation allows for independent optimization of each component. The detection unit processes composition signals to determine irradiation start, while the measurement unit separately handles the integrated dose calculation, reducing overall processing complexity through functional separation
Solution Approach 2:
The patent uses an intermediary approach by introducing a start-of-irradiation detection unit that acts as a mediator between the composition signal acquisition and the integrated dose measurement. This intermediary unit processes composition signals to determine when irradiation begins, and then triggers the measurement unit accordingly. This intermediary layer simplifies the overall process by providing a clear transition point and reducing the complexity of directly integrating all composition signals without a defined start point
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
Enhances the accuracy of integrated dose measurement by accounting for radiation incident before the actual start of irradiation, particularly in high-intensity, short-duration imaging scenarios, thereby improving image quality.
Implementation Method 1
an imaging panel having an array of pixels, each obtained by combining a conversion element for converting radiation into electric charge
Data Source
AI summary
A radiation imaging apparatus including conversion elements acquiring a radiation image and detectors, a readout unit and a controller is provided. In a first operation, the controller causes the readout unit to output a composition signal obtained by composing signals from the detectors, detects irradiation with radiation based on the composition signal, and shifts to a second operation. In the second operation, the controller acquires first signals individually read out from the detectors, decides a signal component, of the composition signal, which is output from a selected detector of the detectors in accordance with a ratio of the first signal from the selected detector to a sum of the first signals, and acquires an integrated dose of radiation incident on the selected detector based on the signal component and the first signal of the selected detector.