Vascular Stent Expansion GUI for IVUS Under-Expansion Detection
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Solution Overview
Problem
Existing IVUS systems lack effective graphical user interfaces for efficiently conveying information about stent expansion and under-expansion during percutaneous coronary intervention procedures, hindering precise stent placement and post-deployment assessment.
Innovation Solution
A graphical user interface (GUI) for IVUS systems that provides visualizations of stent expansion ratios along the longitudinal axis, including automatic stent detection and dynamic updates, using machine learning to analyze IVUS images and generate graphical information elements such as sliders and icons to indicate stent expansion relative to the lumen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If IVUS systems generate and process detailed signals and images during stent deployment, then measurement precision and diagnostic capability are improved, but device complexity and information overload increase
Solution Approach 1:
The patent extracts critical information from complex IVUS signals by automatically detecting stent locations, calculating expansion ratios, and identifying under-expansion areas. The system separates raw image data from processed diagnostic information, presenting only the essential metrics (expansion ratio percentages) to the user while maintaining the complexity of the underlying processing algorithms.
Solution Approach 2:
The system introduces machine learning algorithms and image processing components as intermediaries between the IVUS transducer and the user interface. These intermediary processing layers automatically interpret complex ultrasound signals, detect stent structures, and compute expansion metrics, reducing the burden on the user while maintaining high measurement precision.
2Measurement precision
If the system provides comprehensive stent expansion information, then diagnostic accuracy is improved, but ease of operation deteriorates due to information overload
Solution Approach 1:
The user interface segments comprehensive stent expansion information into distinct visual elements: longitudinal vessel depictions with sliders for position selection, expansion ratio icons for quick reference, and color-coded indicators for under-expansion detection. This segmentation allows users to access detailed information systematically without being overwhelmed by a single complex display.
Solution Approach 2:
The system provides immediate visual feedback to users through real-time expansion ratio calculations and under-expansion detection. When users interact with the slider to select different positions along the vessel, the system instantly updates the expansion ratio display and highlights areas requiring attention, making the information accessible and actionable without increasing operational complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances the efficiency of PCI procedures by providing real-time feedback on stent expansion, reducing treatment time and improving the accuracy of stent placement by identifying under-expansion areas.
Implementation Method 1
The pulse generator in the control module generates electrical pulses that are delivered to the transducer and transformed to acoustic pulses that are transmitted through patient tissue. The patient tissue (or other structure) reflects the acoustic pulses and reflected pulses are absorbed by the transducer and transformed to electric pulses.
Implementation Method 2
The patient tissue (or other structure) reflects the acoustic pulses and reflected pulses are absorbed by the transducer and transformed to electric pulses.
Data Source
AI summary
The present disclosure provides a graphical user interface (GUI) arranged to convey information related to the IVUS images and stent expansion to a user. The GUIs can be generated to include a longitudinal depiction of the vessel and lumen borders as well as a deployed stent. A slider to navigate along the longitudinal axis of the vessel is provided where a stent expansion ratio is dynamically updated based on the slider location.