Radiographic System Timer Synchronization via Adaptive Correction
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Solution Overview
Problem
Existing radiographic systems face challenges in accurately synchronizing the timing of radiation detectors with radiation generators, leading to degraded image quality due to time shifts and the need for external reference signals for correction.
Innovation Solution
A radiographic system with communicable irradiation control and imaging apparatuses, featuring timers for irradiation and imaging timing, a measurement unit for time difference measurement, a correction unit for eliminating time differences, and a selecting unit to choose appropriate correction processing based on the system's operating state, allowing for precise synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If time correction is performed using external reference electromagnetic signal during radiation imaging, then time synchronization between timers is improved, but imaging time is changed by correction amount thereby degrading radiation image quality
Solution Approach 1:
The system dynamically switches between two correction modes based on operating state: during radiation imaging, it uses the second correction processing (small correction amount applied gradually) to maintain image quality, while during non-imaging periods, it uses the first correction processing (large correction amount for rapid synchronization). This dynamic adaptation resolves the contradiction by adjusting the correction strategy according to the operational context.
Solution Approach 2:
The system changes the correction parameter (correction amount) based on the operating state. When radiation imaging is detected, the correction amount is limited to a small value to prevent image quality degradation. When not imaging, the correction amount can be larger to achieve rapid time synchronization. This parameter adjustment resolves the contradiction between synchronization precision and image quality.
2Measurement precision
If time correction is performed with large correction amount, then time difference elimination is improved, but imaging time is changed thereby degrading radiation image quality
Solution Approach 1:
The correction amount is dynamically adjusted based on the operating state. During radiation imaging, the correction amount is constrained to a small value to preserve imaging time accuracy. During non-imaging periods, the correction amount can be larger to eliminate time differences more effectively. This dynamic adjustment resolves the contradiction between time difference elimination and imaging time accuracy.
3Adaptability or versatility
If multiple types of correction processing with different correction periods are used, then adaptability to operating states is improved, but device complexity is increased
Solution Approach 1:
Different correction processing types are applied to different operational contexts (local quality). The first correction processing (larger correction amount) is applied during non-imaging periods, while the second correction processing (smaller correction amount) is applied during radiation imaging. This localized application of different correction strategies provides adaptability while managing complexity through context-specific optimization.
Data Source
AI summary
A radiographic system comprises: an irradiation control apparatus including a first timer configured to provide a time value for an irradiation timing; and a radiographic apparatus that is communicably connected to the irradiation control apparatus and includes a second timer configured to provide a time value for an imaging timing. The system measures a time difference between a time value of the first timer and a time value of the second timer; corrects at least one timer out of the first timer and the second timer so as to eliminate the time difference using one of a plurality of types of correction processing having different correction periods. The correction processing to be used is selected from the plurality of types of correction processing, based on an operating state of the radiographic apparatus.