Radiation Imaging Apparatus Using Pre-Stored Offset Data
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Solution Overview
Problem
Conventional radiation imaging apparatuses face delays in starting imaging due to the need for acquiring offset correction data after power-on, especially when communication with the control apparatus is down, leading to incorrect removal of dark charge components caused by temperature differences.
Innovation Solution
The radiation imaging apparatus includes a control unit that acquires first correction data in a normal imaging state and second correction data in an emergency state from storage, allowing immediate imaging by using pre-stored offset data in abnormal conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If offset correction data is acquired after power-on by driving the radiation detection unit in a non-irradiation state, then dark charge components can be corrected, but imaging preparation time increases
Solution Approach 1:
The system performs preliminary acquisition of offset correction data by driving the radiation detection unit in a non-irradiation state before actual imaging. This preliminary action ensures that correction data is ready in advance, allowing imaging to start without waiting for correction data acquisition during the imaging process itself.
Solution Approach 2:
The system dynamically adjusts the imaging workflow based on whether correction data is already available. When correction data exists, the system can immediately proceed with imaging; when not available, it performs the preparation operation first. This dynamic adaptation optimizes the balance between correction accuracy and imaging speed.
2Productivity
If offset correction is performed using data acquired at a different temperature distribution, then imaging can proceed faster, but correction accuracy decreases due to temperature differences
Solution Approach 1:
The system incorporates temperature detection functionality that monitors the internal temperature of the radiation detection unit. This temperature feedback is used to determine whether previously acquired offset correction data is still valid for current imaging conditions, or whether new correction data needs to be acquired to maintain correction precision.
Solution Approach 2:
The system changes the parameter of temperature monitoring and uses temperature thresholds to decide between using stored correction data or acquiring new correction data. When temperature remains within acceptable ranges, stored data is reused for faster imaging; when temperature changes significantly, new correction data is acquired to maintain precision.
3Reliability
If the system waits for control apparatus communication to confirm imaging mode settings, then imaging parameters can be confirmed, but waiting time increases when communication is down
Solution Approach 1:
The system performs preliminary acquisition of imaging mode settings from the control apparatus before the imaging process begins. This ensures that imaging parameters are confirmed in advance, allowing the imaging process to proceed without additional waiting time even if communication issues arise during imaging.
Solution Approach 2:
The system prepares and stores imaging mode settings in advance as a buffer against potential communication failures. This beforehand cushioning ensures that even if communication with the control apparatus is interrupted, the system can continue with the pre-confirmed imaging parameters without requiring additional waiting time for parameter confirmation.
Data Source
AI summary
A radiation imaging apparatus includes a radiation detection unit, a communication unit configured to receive a setting including an imaging mode when a radiographic image is acquired by the radiation detection unit from a control apparatus, a storage unit configured to store correction data for correcting the radiographic image, and a control unit configured to control an operation of at least one of the radiation detection unit, the communication unit, and the storage unit, wherein, when imaging starts in a normal imaging state where communication between the communication unit and the control apparatus is normal, the control unit acquires first correction data by a first preparation operation of driving the radiation detection unit in a non-irradiation state in the imaging mode, and when imaging starts in an emergency imaging state where the communication state is not normal, the control unit acquires second correction data usable in an abnormal imaging mode.