X-ray Image Corrector for Endovascular Device Positioning
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Solution Overview
Problem
Conventional X-ray diagnosis techniques for endovascular intervention treatments, particularly in pulsing or moving organs like the heart, face challenges in accurately positioning devices due to image processing methods that fix marker positions, leading to reduced accuracy and visibility issues such as Foreshortening and anatomical landmark distortion.
Innovation Solution
The X-ray diagnosis apparatus employs a corrector that generates corrected images by maintaining the positional relation and inclination of the instrument relative to a single point, using image deformation processes like translation and rotation, while avoiding rescale processes to ensure the instrument appears at a constant size and position across images, enhancing visibility and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If image processing is applied to fix marker positions at two points, then the device appears as if being substantially immobile, but the accuracy in positioning the treatment device is reduced due to Foreshortening and anatomical landmark distortion
Solution Approach 1:
The patent applies different image processing treatments to different regions of the image. The device region is processed to maintain stability, while the anatomical landmark region is preserved to maintain accuracy for measurement and positioning reference.
Solution Approach 2:
The image is segmented into multiple regions: device region, anatomical landmark region, and background region. Each region is processed independently with appropriate algorithms to optimize both stability and accuracy for their specific purposes.
2Stability of the object's composition
If conventional two-point marker tracking is used, then the device appears stable in the image, but the anatomical landmarks expand and distort reducing visibility and measurement accuracy
Solution Approach 1:
Different quality preservation strategies are applied to different parts of the image. The device area undergoes stability-enhancing processing, while the anatomical landmark area is processed to preserve structural integrity and visibility, preventing information loss.
Solution Approach 2:
The patent introduces an intermediary processing step that transforms the image to maintain device stability while preserving anatomical landmark information, acting as a mediator between the conflicting requirements of stability and information preservation.
3Ease of operation
If image deformation is applied to fix marker positions, then the device appears immobile, but Foreshortening effects increase making precise positioning difficult
Solution Approach 1:
The patent applies localized quality preservation where the device region is stabilized for ease of operation, while the anatomical landmark region is preserved to maintain precision references for accurate positioning measurements.
Solution Approach 2:
The system dynamically adjusts the image processing parameters based on the detected device position and anatomical landmark positions, optimizing the balance between ease of operation and positioning precision in real-time.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach improves the accuracy of device positioning during endovascular interventions by maintaining the instrument's visibility and correct size, allowing for more precise procedures even in organs with pulsation or movement, and reduces the impact of Foreshortening and anatomical landmark expansion.
Implementation Method 1
an image generator that sequentially generates X-ray images based on X-rays emitted from an X-ray tube and transmitted through a subject
Data Source
AI summary
According to an embodiment, in an X-ray diagnosis apparatus, a detector detects a position of a feature point in the sequentially generated X-ray images. A corrector performs a correction process such that an angle of a line segment including the feature point and a single point based on the feature point detected in any one of the sequentially generated X-ray images substantially agree with an angle based on the feature point and a single point based on the feature point detected in a new X-ray image generated after the X-ray image, thereby sequentially generating corrected images in which a position different from the feature point in the images is substantially the same. Every time each of the corrected images is newly generated by the corrector, a controller sequentially generates the corrected images, thereby displaying a moving image on a display unit.