Radiographic Imaging Timing Control for Dose-Synced Frame Readout
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Solution Overview
Problem
Existing radiographic imaging systems face challenges in accurately synchronizing the irradiation period of a radiation source with the accumulation and reading periods of charges in the detection elements, leading to degraded image quality in moving images.
Innovation Solution
A radiographic imaging apparatus with a hardware processor that controls radiation emission based on dose information to determine the start and end timings of accumulation and reading periods, using a dose detection section to synchronize these periods accurately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If clock synchronization is performed in a state where no irradiation is performed, then the irradiation period and accumulation period can be synchronized, but the irradiation cycle and irradiation time cannot be kept constant due to system variations
Solution Approach 1:
The patent implements feedback control by monitoring the actual irradiation cycle and time, comparing them with target values, and adjusting the reading period timing based on the detected deviations. The hardware processor detects the end timing of the irradiation period and determines the start timing of the reading period based on this detected timing, creating a closed-loop feedback system that maintains synchronization despite variations in irradiation parameters.
Solution Approach 2:
The patent makes the reading period dynamic by adjusting its start timing based on the actual end timing of the irradiation period. Instead of using a fixed predetermined timing, the system adaptively changes the reading period parameters in response to variations in irradiation cycle and time, allowing the system to maintain synchronization under varying operating conditions.
2Ease of operation
If the irradiation period and accumulation period are synchronized using predetermined timing, then the system operation is simple, but the image quality degrades when irradiation cycle or irradiation time varies
Solution Approach 1:
The system uses feedback control to maintain synchronization accuracy. The hardware processor detects the actual end timing of the irradiation period and adjusts the start timing of the reading period based on this detected timing. This feedback mechanism ensures that even when irradiation cycle or irradiation time varies, the reading period remains properly synchronized with the accumulation period, preventing image quality degradation while maintaining relatively simple system operation.
3Device complexity
If the reading period timing is fixed in advance, then the system control is straightforward, but synchronization accuracy decreases when irradiation parameters vary
Solution Approach 1:
The patent implements dynamic timing adjustment where the start timing of the reading period is determined based on the actual end timing of the irradiation period detected by the hardware processor. This dynamic approach allows the system to adapt to variations in irradiation cycle and irradiation time, maintaining synchronization accuracy without requiring overly complex control systems. The hardware processor dynamically calculates and adjusts the reading period timing based on real-time irradiation status.
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-quality synchronization between irradiation and accumulation periods, maintaining consistent image quality in generated moving images.
Implementation Method 1
charges corresponding to the detected amount of radiation are accumulated in the radiation detection element
Data Source
AI summary
An image processing apparatus according to the present disclosure is a radiographic imaging apparatus that generates a moving image including a plurality of frames by repeatedly performing an accumulation period in which charges based on radiation emitted from a radiation source are accumulated and a reading period in which the accumulated charges are read. The radiographic imaging apparatus includes: an output section that outputs information for irradiation control of the radiation from the radiation source based on dose information of the emitted radiation; and an image controller that directly or indirectly determines, based on the dose information, at least one of a start timing and an end timing of the reading period in at least one of a current frame and a next frame of the current frame based on the radiation corresponding to the acquired dose information.