3D Organ Image Rendering With Deformation Correspondence Mapping
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Solution Overview
Problem
Existing methods for displaying three-dimensional images, such as those from CT or MRI, lose internal tissue information during deformation and incur high calculation costs due to large data volumes when using volume rendering.
Innovation Solution
Derive correspondence points on a three-dimensional organ image to use pixel values from the original image for volume rendering of a deformed image, utilizing a solid mesh model and deformation techniques to simulate organ deformation while reducing calculation costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If volume rendering method is used to display internal tissue information of a deformed three-dimensional image, then internal tissue information can be expressed, but calculation cost increases significantly
Solution Approach 1:
The patent pre-calculates and stores correspondence relationships between original image pixels and deformed image sampling points before deformation occurs. This preliminary action allows the system to quickly retrieve and map pixel values during runtime without performing expensive real-time calculations, thus maintaining internal tissue information while reducing calculation cost.
Solution Approach 2:
The patent creates a correspondence map that copies the relationship between original pixel positions and deformed sampling point positions. This copied correspondence data is then used to efficiently transfer pixel values from the original three-dimensional image to the deformed image, avoiding direct complex volume rendering calculations on deformed data.
2Shape
If solid mesh model deformation is applied to maintain visual representation, then organ deformation can be simulated, but internal tissue information is lost
Solution Approach 1:
The patent introduces a correspondence map as an intermediary between the solid mesh model deformation and the final volume rendering. This intermediary stores the mapping relationships, allowing the system to apply mesh deformation for visual representation while preserving the ability to retrieve original pixel values that contain internal tissue information through the correspondence relationships.
Solution Approach 2:
The patent adds a correspondence dimension that links original image space with deformed image space. By maintaining this additional dimensional relationship, the system can display deformed organ shapes while still accessing and rendering internal tissue information from the original three-dimensional image through the established correspondences.
Data Source
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AI summary
A processor is configured to: acquire a three-dimensional organ image; derive correspondence points on the three-dimensional organ image, the correspondence points respectively corresponding to sampling points when volume rendering of a deformed three-dimensional organ image to which the three-dimensional organ image is deformed is to be performed; and use pixel values at the correspondence points on the three-dimensional organ image as pixel values at the sampling points to derive a rendering image which is to be acquired by performing the volume rendering of the deformed three-dimensional organ image.