X-ray Imaging Apparatus Pixel Shift Correction
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Solution Overview
Problem
Motion artifacts in X-ray imaging subtraction images hinder medical procedures by incorrectly displaying background movement, requiring increased X-ray irradiation and recapturing of blood vessel images to correct positioning, which prolongs manipulation time and increases radiation exposure.
Innovation Solution
The X-ray imaging apparatus employs pixel shift processing to calculate and adjust the contrast-enhanced image based on the movement of the object, aligning the background and blood vessel positions to reduce motion artifacts in subtraction images without the need for re-capturing, thereby minimizing X-ray exposure and maintaining continuous manipulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If recaptured blood vessel image is used to reduce motion artifact, then image accuracy is improved, but radiation exposure increases
Solution Approach 1:
The system performs preliminary registration of the blood vessel image before fluoroscopy subtraction. By pre-aligning the blood vessel image with the perspective image using registration processing, the system eliminates motion artifacts without requiring recapture of images, thus avoiding additional radiation exposure while maintaining image accuracy
Solution Approach 2:
The system replaces the mechanical/recapturing-based solution with an image processing-based solution. Instead of recapturing blood vessel images to correct motion artifacts (which requires additional X-ray exposure), the system uses registration processing and pixel shift techniques to realign images computationally, substituting physical recapture with digital image manipulation
2Measurement precision
If recaptured blood vessel image is used to reduce motion artifact, then manipulation accuracy is improved, but procedure time increases
Solution Approach 1:
The system performs registration processing preliminarily to establish the positional relationship between blood vessel images and perspective images before fluoroscopy subtraction. This preliminary alignment ensures that subsequent subtractions are performed on properly registered images, eliminating motion artifacts without requiring time-consuming recapture sequences
Solution Approach 2:
The system maintains continuous fluoroscopy imaging throughout the procedure by using registration processing to handle motion artifacts. Instead of interrupting the continuous imaging to recapture blood vessel images, the system continuously acquires images and applies registration processing in real-time, maintaining procedural continuity while ensuring manipulation accuracy
Data Source
AI summary
An X-ray imaging apparatus is configured to subtract a first X-ray image from a second X-ray image to generate a first subtraction image showing information on a blood vessel, calculate an amount of pixel shift between the first X-ray image and the third X-ray image, subtract the first X-ray image from the third X-ray image to generate a second subtraction image showing information on an insertion instrument, and combine the first subtraction image with the second subtraction image to generate a synthetic image by performing a pixel shift correction based on the amount of pixel shift.