Radiographic Imaging Device Charge Extraction Timing
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Solution Overview
Problem
Existing radiographic imaging devices face time lag issues due to the need for completion of charge accumulation extraction operations before imaging can commence, limiting imaging timing and reducing image quality if interrupted.
Innovation Solution
A radiographic imaging device with a radiation detector that performs repeated charge accumulation extraction operations after a specific accumulation period greater than the radiation irradiation period, allowing for determination of radiation irradiation possibility within the accumulation period, enabling flexible imaging timing and improved image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the accumulation extraction operation is performed repeatedly during standby to remove charge accumulated in each pixel, then image quality is maintained, but imaging timing is limited and time lag occurs
Solution Approach 1:
The patent applies preliminary action by performing accumulation extraction operations in advance during standby periods. The control unit accumulates extraction operations before imaging is actually needed, so that when imaging is requested, the sensor is already ready to capture images immediately without time lag. This resolves the contradiction by preparing the system ahead of time while maintaining image quality.
Solution Approach 2:
The patent implements periodic action by performing accumulation extraction operations at regular intervals during standby mode. The control unit executes these operations periodically to continuously clear accumulated charge from pixels, ensuring image quality is maintained while allowing imaging to occur at any time without restriction. This periodic maintenance approach eliminates timing limitations while preserving image quality.
2Adaptability or versatility
If the accumulation extraction operation is stopped midway to allow imaging, then imaging timing becomes flexible, but line aberration is generated and image quality is reduced
Solution Approach 1:
The patent applies continuity of useful action by ensuring that accumulation extraction operations continue uninterrupted during standby periods. The control unit maintains continuous extraction operations rather than stopping them to allow imaging, thereby preventing line aberration and maintaining image quality. Imaging can proceed independently without interrupting the extraction process, achieving both flexibility and quality.
Solution Approach 2:
The control unit performs accumulation extraction operations in advance and completes full extraction cycles before imaging begins. This preliminary completion of extraction operations ensures that no charge accumulation interferes with imaging, preventing line aberration while allowing imaging to occur at flexible timings without compromising image quality.
3Manufacturing precision
If imaging is performed only after one frame's worth of accumulation extraction operation is completed, then line aberration is avoided, but time lag till commencement of imaging increases
Solution Approach 1:
The patent applies preliminary action by completing accumulation extraction operations during standby periods before imaging is requested. The control unit performs extraction operations in advance so that when imaging is needed, the sensor is already clear of accumulated charge, allowing immediate imaging without time lag while maintaining image quality.
Solution Approach 2:
The control unit performs accumulation extraction operations periodically during standby mode at optimized intervals. By scheduling these operations periodically rather than waiting for full frame completion, the system maintains image quality through regular charge removal while reducing time lag to enable faster imaging commencement.
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 solution allows for radiographic images to be captured at desired timings while minimizing time lag, as the device can determine and permit radiation irradiation within the accumulation period, ensuring consistent image quality.
Implementation Method 1
a radiation detector that has a plurality of sensor portions that accumulate charge generated when radiation is irradiated thereon
Data Source
AI summary
There is provided a radiographic imaging device including: a radiation detector having plural sensor portions; a receiving unit that receives request data requesting radiation irradiation permission from a control device that controls a radiation source; a control unit that controls the radiation detector such that an accumulation extraction operation is repeatedly performed that extracts charge that has accumulated in each sensor portions of the radiation detector, the accumulation extraction operation being performed after a specific accumulation period has elapsed that is greater than the irradiation period of radiation; a determination unit that determines whether or not radiation irradiation of the irradiation period from the radiation source is possible within the accumulation period of the accumulation extraction operation; and a permission unit that permits radiation irradiation if the determination unit has determined that irradiation is possible, and otherwise that permits radiographic image after starting the accumulation period of the next accumulation extraction operation.