Hierarchical Heart Valve Motion Modeling
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Solution Overview
Problem
Current medical diagnostic imaging technologies face challenges in accurately assessing heart valve operations due to the complexity of valve motion and the lack of comprehensive, patient-specific models, leading to inaccurate and time-consuming assessments.
Innovation Solution
A hierarchical model is used to assess heart valve operation by estimating rigid global motion, non-rigid local motion, and surface motion of the valve, employing spectral trajectory approaches and machine-learned probabilistic models to determine landmark locations and motion trajectories efficiently, allowing for simultaneous modeling of multiple valves during imaging sessions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If comprehensive four-dimensional volumetric scans are used to capture complete structural and dynamic information, then measurement precision and reliability improve, but device complexity and difficulty of detecting and measuring increase
Solution Approach 1:
The patent segments the complex four-dimensional volumetric data into discrete time-resolved frames representing different phases of the cardiac cycle. By dividing the continuous volumetric dataset into manageable temporal segments, the system can process and analyze valve motion at specific cardiac phases independently, reducing the overall computational complexity while preserving complete structural and dynamic information.
Solution Approach 2:
The patent applies preliminary image processing and registration steps to the volumetric scan data before detailed valve assessment. By pre-processing the four-dimensional data to establish spatial-temporal alignment and extract key anatomical structures in advance, the system simplifies subsequent analysis of valve motion and morphology, making the detection and measurement processes more tractable.
2Measurement precision
If manual processing and measurement methods are used, then device complexity is reduced, but measurement precision and productivity deteriorate
Solution Approach 1:
The patent implements automated algorithms that perform valve detection, segmentation, and measurement without requiring manual intervention. The system self-calibrates by automatically identifying anatomical landmarks and valve structures within the volumetric data, then autonomously computes motion parameters and morphological measurements across the cardiac cycle, eliminating time-consuming manual processing while maintaining high measurement precision.
Solution Approach 2:
The patent replaces manual mechanical measurement methods with automated computational image analysis. Instead of physical calipers or manual tracing on images, the system uses digital signal processing, pattern recognition, and 3D reconstruction algorithms to automatically extract valve geometry and motion characteristics from the volumetric scan data, dramatically increasing productivity while preserving measurement accuracy.
3Adaptability or versatility
If existing generic valve models are used, then device complexity is reduced, but adaptability and measurement precision worsen
Solution Approach 1:
The patent implements patient-specific valve models that capture local anatomical variations in valve geometry and motion patterns. Rather than applying uniform generic parameters, the system extracts and models patient-specific characteristics such as individual leaflet shapes, annulus geometry, and unique motion trajectories from each patient's volumetric scan data, enabling precise adaptation to local anatomical quality while managing complexity through automated parameter extraction.
Solution Approach 2:
The patent dynamically adjusts model parameters based on patient-specific data extracted from the volumetric scans. The system varies geometric parameters, material properties, and boundary conditions to reflect individual patient anatomy and physiology, transforming fixed generic models into adaptive patient-specific representations. This parameter customization is achieved through automated image-to-model mapping that translates scan data directly into model parameters.
Data Source
AI summary
Heart valve operation is assessed with patient-specific medical diagnostic imaging data. To deal with the complex motion of the passive valve tissue, a hierarchal model is used. Rigid global motion of the overall valve, non-rigid local motion of landmarks of the valve, and surface motion of the valve are modeled sequentially. For the non-rigid local motion, a spectral trajectory approach is used in the model to determine location and motion of the landmarks more efficiently than detection and tracking. Given efficiencies in processing, more than one valve may be modeled at a same time. A graphic overlay representing the valve in four dimensions and/or quantities may be provided during an imaging session. One or more of these features may be used in combination or independently.


