Medical Image Reconstruction via Geometry Correction and Trajectory Detection
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Solution Overview
Problem
Conventional methods for generating 2D medical images from CT scans often result in inaccurate images due to patient misalignment during radiography, leading to distorted panoramic views and exclusion of teeth outside the dental arch trajectory, requiring manual reconstruction and additional exposure.
Innovation Solution
An automatic reconstruction method that corrects patient posture misalignment using CT geometry correction and detects the dental arch trajectory to generate accurate 2D medical images without additional radiography, reducing exposure and improving image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a 2D medical image is obtained by adding medical images within a selected area using a simple image combining method, then the image combining process is simplified, but the accuracy of the resulting 2D medical image deteriorates and differs from an actually radiographed panorama image
Solution Approach 1:
The patent replaces the mechanical/manual process of simple image combining with an automated computer-based reconstruction system that performs panoramic imaging through systematic coordinate transformations and image integration algorithms, thereby achieving both automation and high accuracy
Solution Approach 2:
The patent transforms the image combination process by changing the parameters from simple additive combining to a coordinated transformation system that applies spatial transformations, rotations, and projections based on the selected area coordinates, enabling accurate panoramic reconstruction
2Productivity
If a CT image is radiographed in a state in which the patient is posing in a wrong posture, then the radiography process is faster and easier, but the CT image becomes distorted and bilateral symmetry and facial skeleton structures appear misaligned
Solution Approach 1:
The patent performs preliminary actions by detecting anatomical landmarks and calculating transformation parameters before the actual panoramic image reconstruction, allowing the system to pre-compensate for patient posture deviations and achieve accurate alignment without requiring perfect positioning during radiography
Solution Approach 2:
The patent implements feedback mechanisms by detecting the actual positions of anatomical structures in the CT data, comparing them with expected positions, and automatically adjusting the transformation parameters to correct misalignments caused by patient posture variations
3Ease of operation
If a panorama image is generated by manual reconstruction method with arbitrary dental arch trajectory input, then the reconstruction process allows user control, but teeth outside the dental arch trajectory are excluded and the process requires additional user time
Solution Approach 1:
The patent enables the system to perform self-service by automatically detecting the dental arch trajectory and selecting the appropriate area based on anatomical features in the CT data, eliminating the need for manual user input while ensuring all relevant teeth are included in the reconstruction
Data Source
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AI summary
The present invention provides a device, a method and a recording medium for reconstructing a medical image. To this end, the present invention comprises: a geometry correction unit for correcting the geometry of three-dimensional medical image information such that a three-dimensional medical image is properly positioned in a three-dimensional space; an arc trajectory detection unit for detecting an arc trajectory from the three-dimensional medical image information; an image information utilization section setting unit for setting an image information utilization section for the three-dimensional medical image information and setting an X-ray irradiation path for the arc trajectory; and a reconstructing unit for reconstructing a two-dimensional medical image by summing into X-ray irradiation paths the three-dimensional medical image information of the image information utilization section.