Radiation Imaging Sample-and-Hold Timing for Adaptive Fluoroscopy
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Solution Overview
Problem
Existing radiation imaging systems fail to adjust the timing of sampling and holding operations in response to changes in the posture or irradiation conditions during fluoroscopic imaging, leading to degraded image quality.
Innovation Solution
A radiation imaging apparatus with a controller that determines the timings of sampling and holding operations based on the radiation generation condition, allowing for adjustments in response to changes in the posture or irradiation conditions during fluoroscopic imaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the timing of sampling and holding operations is fixed, then the device complexity is reduced, but the image quality degrades when radiation generation conditions change
Solution Approach 1:
The patent implements dynamic adjustment of sampling and holding timings based on real-time radiation generation conditions. The control apparatus receives radiation generation condition information from the radiation generating apparatus and dynamically determines optimal sampling/holding timings, allowing the system to adapt to changing radiation conditions during fluoroscopic imaging while maintaining image quality without requiring complex hardware modifications
Solution Approach 2:
The patent changes the timing parameters of sampling and holding operations in response to radiation generation condition changes. By adjusting the timing parameters dynamically based on feedback from the radiation generating apparatus, the system optimizes image quality under varying radiation conditions without increasing device complexity
2Manufacturing precision
If the timing of sampling and holding operations is adjusted dynamically, then the image quality is maintained under changing radiation conditions, but the device complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where the control apparatus receives radiation generation condition information from the radiation generating apparatus and uses this feedback to determine optimal sampling and holding timings. This closed-loop control ensures image quality is maintained under changing radiation conditions while keeping the control system manageable through systematic feedback processing
Solution Approach 2:
The control apparatus performs multiple functions: it manages the radiation generating apparatus, receives radiation generation condition information, determines sampling/holding timings, and coordinates with the radiation detector. This multi-functional approach consolidates control complexity into a single apparatus that handles various tasks through integrated processing
3Manufacturing precision
If sampling and holding operations are performed during irradiation period, then the image quality is improved, but the reliability of timing synchronization deteriorates
Solution Approach 1:
The control apparatus determines the timing of sampling and holding operations in advance based on predicted radiation generation conditions. By preliminarily setting the timing before actual irradiation occurs, the system ensures accurate synchronization while capturing images during the irradiation period, thus maintaining both image quality and timing reliability
Solution Approach 2:
The patent dynamically adjusts sampling and holding timings to coincide with the irradiation period while maintaining synchronization reliability. The control apparatus continuously adapts the timing based on real-time radiation generation conditions, ensuring that sampling occurs during optimal irradiation phases without losing synchronization accuracy
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 enhances image quality by dynamically adjusting the sampling and holding operations to match changing radiation conditions, thereby improving the quality of fluoroscopic images.
Implementation Method 1
each of the plurality of pixels includes a conversion element configured to convert radiation into an electrical signal
Data Source
AI summary
A radiation imaging apparatus includes a pixel array having a plurality of pixels configured to detect radiation, and a controller configured to obtain a radiation generation condition related to a radiation generating apparatus during fluoroscopic imaging, and determine, during the fluoroscopic imaging, timings of a plurality of sampling and holding operations in each of the plurality of pixels in accordance with the radiation generation condition. The timing of at least one sampling and holding operation is a timing in an irradiation period of radiation, and each of the plurality of pixels includes a conversion element configured to convert radiation into an electrical signal, and a sample and hold circuit configured to sample and hold signals from the conversion element multiple times in accordance with the timings, determined by the controller, of the plurality of sampling and holding operations.