Radiography Imaging Support With Synchronized Optical Motion Capture
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Solution Overview
Problem
Existing radiography systems face issues with misregistration of the imaging site due to slight subject movement, leading to unclear depictions in radiation images, necessitating unnecessary reimaging, and there is a lack of precise synchronization between optical and radiation image capture.
Innovation Solution
An imaging support device with an optical camera capturing motion pictures synchronized with radiation image detection, allowing for precise alignment by superimposing still optical images onto motion pictures for real-time display, reducing time lag and improving positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an optical camera captures still images for alignment reference, then positioning accuracy improves, but time lag between optical and radiation image capture increases
Solution Approach 1:
The optical camera captures motion pictures continuously at regular intervals, providing multiple optical images at different time points. This periodic capture allows the system to select the most appropriate optical image for alignment that minimizes time lag with the radiation image capture.
Solution Approach 2:
The system transitions from static still image capture to dynamic motion picture capture. By using a sequence of optical images from motion pictures, the system can dynamically select the frame that best aligns with the radiation image timing, adapting to subject movement during the imaging process.
2Measurement precision
If multiple optical images are captured for alignment, then positioning accuracy improves, but device complexity increases
Solution Approach 1:
The optical camera serves multiple functions: it captures both still images and motion pictures, provides real-time visual feedback, and supplies alignment reference images. This multi-functionality reduces the need for separate systems while improving alignment accuracy through multiple image options.
Solution Approach 2:
The system uses optical copies (images) of the subject from motion pictures as reference for alignment with the radiation image. These optical copies serve as virtual models that guide positioning without requiring additional physical positioning aids or complex mechanical alignment devices.
3Manufacturing precision
If reimaging is performed to correct misregistration, then image quality improves, but loss of time and increase in exposure increases
Solution Approach 1:
The system performs preliminary alignment by displaying optical images from motion pictures before radiation image capture. This preliminary visual guidance allows the operator to position the subject correctly in advance, preventing misregistration and avoiding the need for time-consuming reimaging procedures.
Solution Approach 2:
The system provides visual feedback by displaying optical images that show subject position and movement. This feedback allows the operator to make real-time adjustments to positioning, ensuring correct alignment before radiation exposure and eliminating the need for corrective reimaging.
Data Source
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AI summary
An imaging support device used in a radiography apparatus including a radiation source and a radiation image detector that detects a radiation image of a subject on the basis of radiation emitted from the radiation source and transmitted through the subject includes an optical camera that outputs an optical image by optically imaging a region including an irradiation field of the radiation applied to the subject from the radiation source, and at least one processor, in which the processor associates the optical image acquired by the optical camera with the radiation image on the basis of a timing signal transmitted from the radiation image detector side.