Right Ventricle Polar-Map Development for Ultrasound Imaging
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Solution Overview
Problem
Conventional three-dimensional tracking (3DT) for analyzing heart wall-motion indices is limited by the inability to intuitively visualize the right ventricle's anatomy, as existing methods like surface rendering and polar-maps struggle to clearly depict the positional relation of the inlet and outflow portions and the crista supraventricularis, lacking a standard segment model for the right ventricle.
Innovation Solution
An ultrasound diagnostic apparatus generates a polar-map for the right ventricle by dissecting the SR image across specific markers, developing the image onto a right ventricular segment model with the inlet and outflow portions plotted separately on the external circumference, allowing for intuitive visualization of the right ventricle's anatomy by mapping hidden regions and connecting edges to their corresponding positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a surface rendering (SR) image is used to visualize the right ventricle, then shape information is provided, but the side opposite to the viewpoint is hidden and cannot be seen simultaneously
Solution Approach 1:
The patent transitions from a three-dimensional volumetric view to a two-dimensional developed plane view. By unfolding the right ventricle surface onto a flat plane, the invention enables simultaneous visualization of all regions including those hidden in conventional SR images, while preserving spatial relationships through coordinate mapping.
Solution Approach 2:
The patent divides the right ventricle into multiple segments based on anatomical structures (inlet portion, outflow portion, crista supraventricularis). This segmentation allows each region to be mapped to specific areas on the developed plane, making hidden structures visible and distinguishable while maintaining their spatial relationships.
2Loss of information
If conventional polar-map visualization is used, then the entire appearance can be grasped, but the positional relation of inlet and outflow portions and crista supraventricularis is not clearly depicted
Solution Approach 1:
The patent applies different mapping strategies to different regions of the right ventricle. The inlet portion, outflow portion, and crista supraventricularis are mapped to distinct areas on the developed plane with specific coordinate transformations, ensuring that local anatomical relationships are preserved while displaying the entire ventricle structure.
Solution Approach 2:
The patent creates a developed plane copy of the three-dimensional right ventricle surface. This copied representation maintains the spatial relationships of anatomical structures while presenting them in a two-dimensional format that allows simultaneous visualization of all regions and their positional relationships.
3Ease of operation
If a standard segment model for the right ventricle is created by dissecting SR image, then intuitive visualization is achieved, but the device complexity increases
Solution Approach 1:
The patent implements automated algorithms that perform the dissection and mapping processes without manual intervention. The system automatically identifies anatomical landmarks, divides the ventricle into segments, and maps them to the developed plane, reducing operational complexity despite the sophisticated processing required.
Solution Approach 2:
The patent pre-defines the mapping relationships and segment boundaries based on anatomical knowledge before actual visualization. By establishing the developed plane model and coordinate transformations in advance, the system simplifies the real-time processing required during operation.
Data Source
AI summary
An ultrasound diagnostic apparatus according to one embodiment includes processing circuitry. The processing circuitry acquires local function index values related to a right ventricle. The processing circuitry generates a functional image of the right ventricle representing a distribution of the local function index values, using a medical model diagram of the right ventricle, the medical model diagram being a model diagram in which the right ventricle is developed onto a plane, and in which a blood inlet portion leading into the right ventricle and a blood outflow portion leading out from the right ventricle are plotted to positions that are separated from each other on the external circumference side of the model diagram. The processing circuitry then causes a display to display the functional image of the right ventricle.