Medical Image Display Apparatus Distortion Correction
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Solution Overview
Problem
Existing medical image display technologies struggle to geometrically precisely display lesions in luminal organs due to geometric distortion, particularly in the context of polyps, where the length of the organ's internal wall is not accurately represented.
Innovation Solution
A medical image display apparatus and method that calculates morphological information on lesions by extracting the central line of a luminal organ, correcting distortion, and creating a deployed image with uniform sampling pitches in both the circumferential and axial directions, allowing for precise geometric representation of lesions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a deployed image is created proportional to the radius of the luminal organ, then the length in the circumferential direction can be visualized, but geometric distortion occurs and lesion size cannot be accurately represented
Solution Approach 1:
The patent changes the sampling pitch parameter from a fixed value to a variable that depends on the radius of the luminal organ. Specifically, the sampling pitch in the circumferential direction is set to be proportional to the radius (2πRi/L), which compensates for the geometric distortion inherent in deployed images and enables accurate lesion size measurement while preserving the circumferential length visualization.
2Manufacturing precision
If uniform sampling pitch is used in both circumferential and axial directions, then geometric precision is improved, but the complexity of image creation increases
Solution Approach 1:
The patent introduces a radius-dependent sampling pitch parameter that varies in the circumferential direction while maintaining uniformity in the axial direction. This controlled parameter change achieves geometric precision by accounting for the organ's curvature without requiring complex three-dimensional transformation algorithms, thus balancing precision with implementation feasibility.
Data Source
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Figure 3(A)~3(B)
AI summary
A medical image display apparatus in accordance with the present invention includes a means (13) for selectively inputting a desired medical image from among medical images taken by a medial-image radiography system, a deployed image creating means (11a) for reading the selectively inputted medical image from the medical-image radiography system or an external storage device, and producing a deployed image of a region of a luminal organ contained in the read medical image, and a control means (11) for controlling display of the created deployed image on a display means (18). The control means (11) includes a correcting means (11b) for calculating a magnitude of a variance between radial information, which contracts or expands to a predetermined value in the region of the luminal organ, and radial information on a nearby position, and correcting a distortion of the deployed image, which is created by the deployed image creating means (11a), on the basis of the calculated magnitude of the variance between the pieces of radial information.