Radiation Imaging Apparatus Fast Memory Gain Correction
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Solution Overview
Problem
Radiation imaging apparatuses take a long time to complete imaging preparations due to the need to acquire and read data for offset and gain corrections across multiple imaging modes, especially as the number of modes increases, and the characteristics of offset correction can change over time due to environmental factors like temperature.
Innovation Solution
A radiation imaging apparatus with a first memory for storing gain correction data and a second, faster memory for storing gain correction data, allowing for quicker access and processing of data during imaging requests, enabling the apparatus to perform imaging in multiple modes efficiently and adapt to changes in offset characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If data for gain correction in all imaging modes are acquired and stored in a fast memory after startup, then imaging preparation time is reduced, but the system complexity and memory requirements increase
Solution Approach 1:
The patent divides the memory system into two segments: a first memory (non-volatile) for storing all gain correction data and a second memory (volatile/fast) for storing only the gain correction data needed for currently active imaging modes. This segmentation allows the system to maintain comprehensive data storage while enabling fast access for active modes without requiring all data to reside simultaneously in fast memory, thus reducing both time loss and device complexity.
2Reliability
If offset correction data is acquired for all imaging modes after startup, then complete correction data is available, but the time until imaging can be performed increases significantly
Solution Approach 1:
The patent applies preliminary action by pre-acquiring and storing offset correction data for all imaging modes in the non-volatile first memory during the startup phase. This ensures that when imaging is requested, the offset correction data is already available and does not need to be acquired in real-time, thus maintaining reliability while reducing the time delay before imaging can commence.
3Adaptability or versatility
If the radiation imaging apparatus performs imaging in multiple modes with different priorities, then versatility is improved, but the time management and data processing complexity increases
Solution Approach 1:
The patent applies local quality by assigning different characteristics to different imaging modes based on their priority and usage requirements. High-priority modes receive preferential treatment in terms of data loading speed and memory allocation, while lower-priority modes can wait for data to be loaded. This allows the system to maintain versatility across multiple imaging modes while managing complexity through differentiated handling strategies rather than uniform processing.
Data Source
AI summary
A radiation imaging apparatus comprising a first memory storing first gain correction data corresponding to imaging modes, a second memory having a higher read speed than the first memory, and a controller being able to perform imaging in the imaging modes is provided. The controller stores second gain correction data based on the first gain correction data in the second memory after startup, and when an imaging request is issued from startup to storage of all the second gain correction data into the second memory and requested gain correction data which corresponds to a requested imaging mode has been stored in the second memory, performs acquisition of radiation image data and offset correction data in the requested imaging mode and correction for the radiation image data by using the offset correction data and the requested gain correction data stored in the second memory.