X-ray Diagnosis Apparatus with ROI Filter for Radiation Reduction
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Solution Overview
Problem
Conventional X-ray diagnosis apparatuses face challenges in efficiently generating sharp images of regions of interest while minimizing radiation exposure and accurately tracking the position of medical devices within blood vessels during intervention treatments.
Innovation Solution
The X-ray diagnosis apparatus employs a ROI filter to control X-ray radiation doses, allowing for differential radiation exposure between the region of interest and other areas, and generates a wire mask image to track the medical device's position, enabling the creation of a fluoroscopy road map that reduces radiation exposure and improves image clarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a filtering function is used to reduce radiation exposure to regions other than the region of interest, then the radiation exposure amount of the subject is reduced, but the image quality and sharpness of the region of interest may be compromised
Solution Approach 1:
The patent divides the subject into a region of interest and other regions, applying different radiation doses to each. The filtering function selectively attenuates X-rays in regions other than the region of interest while maintaining full radiation dose in the region of interest, thereby reducing overall radiation exposure without compromising image quality where needed.
Solution Approach 2:
The patent implements local quality by applying different radiation exposure levels to different spatial locations. The filtering function creates a non-uniform radiation distribution where the region of interest receives full dose for sharp imaging, while other regions receive reduced dose to minimize radiation exposure, thus optimizing both image quality and radiation safety locally.
2Manufacturing precision
If the radiation dose is increased to ensure sharp images of the region of interest, then the image quality is improved, but the radiation exposure amount to the subject increases
Solution Approach 1:
The patent segments the radiation dose distribution by applying high dose only to the region of interest and low dose to other regions. This segmentation allows optimization of image sharpness in the region of interest while minimizing overall radiation exposure to the subject.
Solution Approach 2:
The patent implements local quality by concentrating the high radiation dose specifically where it is needed (region of interest) for sharp imaging, while reducing the dose elsewhere. This localized optimization ensures image quality is maintained where required without unnecessarily increasing overall radiation exposure.
3Device complexity
If conventional X-ray imaging is used without region-specific filtering, then the equipment complexity is low, but the ability to track medical device position and reduce radiation exposure is limited
Solution Approach 1:
The patent implements a filtering function that serves multiple purposes: reducing radiation exposure to regions other than the region of interest, improving the contrast and visibility of medical devices in the region of interest, and enabling accurate position tracking. This multi-functional approach enhances measurement precision without requiring separate systems for each function.
Solution Approach 2:
The filtering function acts as an intermediary between the X-ray source and the detector, selectively modifying the X-ray beam to enhance the visibility of medical devices and reduce background radiation. This intermediary element enables improved position tracking accuracy by optimizing the radiation distribution before the X-rays reach the detection system.
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 solution enhances the efficiency of intervention treatments by providing clear, radiation-reduced images of medical devices within blood vessels, allowing for precise tracking and reduced radiation exposure to the subject.
Implementation Method 1
acquire a first X-ray image on a basis of X-rays radiated onto a subject in a first radiation dose
Data Source
AI summary
An X-ray diagnosis apparatus according to an embodiment acquires a first X-ray image and a second X-ray image by using mutually-different radiation doses; acquires a third X-ray image based on X-rays radiated onto a region of interest of the subject and onto a region other than the region of interest in mutually-different radiation doses; obtains position information of the region of interest; and on a basis of the position information, generates a subtraction image by calculating a difference between the region of interest in the third X-ray image and a region corresponding to the region of interest in the first X-ray image and calculating a difference between the region other than the region of interest in the third X-ray image and a region corresponding to the region other than the region of interest in the second X-ray image.