Radiation Imaging Offset Correction Mode Storage
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Solution Overview
Problem
Existing radiation imaging apparatuses face challenges in performing offset correction efficiently, especially when there is a time lag between acquiring offset images and radiographic images, or when there are multiple photography modes that require frequent updates of offset images.
Innovation Solution
A radiation imaging apparatus is designed with a radiographic image acquisition unit, an offset image acquisition unit, an offset correction unit, a mode storage portion, and an offset image update control unit. This configuration allows for the acquisition and storage of offset images specific to each photography mode, enabling timely and appropriate offset correction even under time constraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If offset image is updated in every photography mode right before photographing, then offset correction accuracy is improved, but acquisition time increases and causes waiting for photographing
Solution Approach 1:
The patent applies partial action by updating offset images selectively rather than for all photography modes. The control unit determines which photography modes require offset image updates based on whether the current mode matches the previously used mode, thereby performing only the necessary updates and reducing total acquisition time while maintaining correction accuracy for relevant modes.
Solution Approach 2:
The patent implements preliminary action by acquiring offset images in advance for multiple photography modes and storing them in the offset image storage unit. This allows the system to have offset images ready before they are needed, eliminating the need to wait for offset image acquisition at the moment of photographing, thus reducing waiting time while maintaining correction accuracy.
2Measurement precision
If offset image is updated frequently for multiple photography modes, then offset correction accuracy is improved, but productivity decreases due to time consumption
Solution Approach 1:
The system performs partial updates of offset images based on the actual photography mode sequence. By comparing the current photography mode with the previously used mode and determining whether an update is necessary, the system avoids redundant updates and maintains productivity while ensuring correction accuracy is preserved for the modes that are actually used.
Solution Approach 2:
The control unit automatically manages the offset image update process by monitoring the photography mode sequence and autonomously determining when updates are needed. This self-service mechanism eliminates the need for manual intervention and optimizes the balance between correction accuracy and productivity without user involvement.
3Productivity
If offset image acquisition time is reduced, then productivity is improved, but offset correction accuracy may deteriorate
Solution Approach 1:
The patent resolves this contradiction by acquiring offset images in advance for multiple photography modes and storing them before they are needed. This preliminary acquisition allows the system to maintain high productivity during actual photographing operations while ensuring that accurate offset images are available for correction, thus preventing any deterioration in correction accuracy.
Solution Approach 2:
The system applies local quality by maintaining high-quality offset images for specific photography modes that are actually used, rather than uniformly updating all modes. The control unit identifies which modes require accurate offset correction and ensures those specific offset images are acquired and stored, optimizing the balance between productivity and accuracy for the relevant local cases.
Data Source
AI summary
A radiation imaging apparatus includes: a radiographic image acquisition unit for acquiring radiographic image data of a plurality of objects in a mode selected from a plurality of modes for acquiring different radiographic images; an offset image acquisition unit for acquiring offset image data in each of the plurality of modes; and an offset correction unit for executing offset correction of the acquired radiographic image data with use of the acquired offset image data, a mode storage portion for storing a mode selected in order to acquire the radiographic image data of the plurality of objects, and an offset image update control unit for controlling the offset image acquisition unit so that the offset image data to be used for the offset correction is acquired in the stored mode are provided.