IVUS Image Processing Device Marking Shift Correction
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Solution Overview
Problem
Current systems for marking locations on biological tissues using intravascular ultrasound (IVUS) face challenges such as display position shifts due to axial movement or pulsation, particularly affecting inexperienced operators, and are costly when using 3D mapping systems.
Innovation Solution
An image processing device that acquires specification data from tomographic data to identify the direction and position of marked locations relative to the centroid in a cross-sectional image, ensuring accurate display of marks by adjusting their color and position based on distance from the cross-sectional plane, thereby eliminating shifts and improving usability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a 3D mapping system with position sensor is used to mark locations on biological tissue, then marking precision is improved, but device cost increases significantly
Solution Approach 1:
The patent creates a virtual three-dimensional image as a copy of the actual biological tissue structure based on IVUS data. This virtual model allows precise marking of locations without requiring expensive physical 3D mapping systems with position sensors. The virtual image serves as a surrogate that replicates the essential spatial relationships and anatomical features needed for accurate marking.
2Ease of operation
If automatic three-dimensional image generation is implemented, then ease of operation is improved for inexperienced doctors, but device complexity increases
Solution Approach 1:
The system performs automatic three-dimensional image generation and mark position correction without requiring manual intervention from the operator. The control unit automatically processes the two-dimensional IVUS images, generates the three-dimensional virtual image, identifies mark positions, and corrects any display shifts. This automation eliminates the need for doctors to manually reconstruct three-dimensional structures in their heads, making the system user-friendly even for inexperienced users.
3Speed
If marks are displayed on moving biological tissue during pulsation or axial shift, then real-time monitoring capability is improved, but marking precision deteriorates due to display position shifts
Solution Approach 1:
The system continuously monitors the position of marks on the virtual three-dimensional image and compares it with the actual tissue structure. When axial shifts or pulsation cause display position deviations, the control unit automatically detects these changes and corrects the mark positions by identifying their true locations based on the updated virtual image. This closed-loop feedback mechanism ensures that marks remain accurately positioned on the moving tissue throughout the procedure.
Data Source
AI summary
An image processing device, with reference to tomographic data obtained using a sensor moving in a lumen of a biological tissue, displays an image representing the biological tissue on a display, and includes a control unit that acquires specification data specifying at least one location in a space corresponding to the tomographic data, identifies a direction of the at least one location from a centroid in a cross section of the biological tissue orthogonal to a movement direction of the sensor, the direction including the at least one location, as a specification direction, with reference to the tomographic data, identifies a position corresponding to the at least one location in the cross section as a corresponding position according to an identified specification direction and a position of the centroid, and performs control so that a mark is displayed at an identified corresponding position when the image is displayed.