Multi-Gated Doppler Tracking for Continuous Vessel Signal Acquisition
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Solution Overview
Problem
Conventional ultrasound imaging techniques face challenges in tracking anatomical structures over time due to patient and probe movement, especially when acquiring Pulsed-Wave (PW) Doppler signals from small vessels or tissue segments, as these structures may move out of the acquisition region.
Innovation Solution
A system and method utilizing Multi-Gated Doppler (MGD) signals to track anatomical structures by identifying and switching between multiple gates in a 2D ultrasound image, generating a continuous PW Doppler signal by stitching together PW Doppler signal portions from different gates, and employing image processing techniques to maintain accurate tracking despite movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single PW Doppler acquisition region is used, then the signal acquisition is simple and the device complexity is low, but the anatomical structure may move out of the acquisition region due to patient or probe movement, causing loss of the Doppler signal
Solution Approach 1:
The ultrasound imaging region is divided into multiple gates (G1, G2, G3, etc.), each capable of acquiring PW Doppler signals independently. This segmentation allows the system to track anatomical structures as they move between different gates, ensuring continuous signal acquisition without requiring a single large acquisition region.
Solution Approach 2:
The system continuously monitors the position of anatomical structures across multiple gates and uses this feedback information to dynamically switch between gates. By detecting which gate currently contains the target structure, the system automatically adjusts the acquisition region to maintain continuous Doppler signal recording.
2Reliability
If the PW Doppler signal acquisition region is enlarged to accommodate movement, then the anatomical structure remains in the acquisition region, but the spatial resolution and velocity measurement precision decrease
Solution Approach 1:
Rather than using one large acquisition region that would reduce resolution, the system segments the region into multiple small gates. Each gate maintains high spatial resolution and velocity measurement precision, while the collective array of gates covers a larger area to accommodate anatomical structure movement.
Solution Approach 2:
The system dynamically switches between different gates based on the real-time position of the anatomical structure. This dynamic adaptation allows the acquisition region to effectively follow the structure's movement, maintaining both high precision measurements and continuous tracking without requiring a permanently enlarged fixed region.
3Duration of action of moving object
If PW Doppler signals are acquired over an extended period to observe periodic characteristics, then more complete periodic data is obtained, but patient or probe movement causes the anatomical structure to leave the acquisition region
Solution Approach 1:
The extended acquisition period is supported by having multiple gates that can sequentially track the anatomical structure. As the structure moves over time, the system switches between gates to maintain continuous monitoring, enabling long-duration observations of periodic characteristics without signal loss.
Solution Approach 2:
The system ensures continuous Doppler signal acquisition by automatically switching between gates as the anatomical structure moves. This continuity allows extended-period observations to be performed without interruption, maintaining reliable data collection for analyzing periodic characteristics over time.
4Reliability
If multiple gates are used to track anatomical structures, then continuous signal acquisition is maintained despite movement, but the device complexity and signal processing requirements increase
Solution Approach 1:
The system divides the imaging region into multiple gates with identical, standardized PW Doppler acquisition capabilities. This segmentation approach allows the use of existing hardware components without requiring complex new equipment, as each gate uses the same acquisition machinery operating in different spatial locations.
Solution Approach 2:
Each gate is designed with universal, multi-functional capabilities to acquire and process PW Doppler signals. This universality means the same hardware and processing algorithms can be applied across all gates, reducing overall system complexity compared to having specialized equipment for each tracking zone.
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
Enables enhanced visualization and continuous acquisition of PW Doppler signals from anatomical structures over extended periods, improving the accuracy and reliability of vessel segmentation and flow velocity estimation, even for small vessels with slow blood flow.
Implementation Method 1
Ultrasound imaging uses real time, non-invasive high frequency sound waves to produce a two-dimensional (2D) image and/or a three-dimensional (3D) image
Implementation Method 2
Pulsed-Wave (PW) Doppler signals are rich signals that describe the spectrum of tissue and fluid velocities in a small volume from which the signals are acquired
Data Source
AI summary
A system and method for tracking an anatomical structure over time based on Pulsed-Wave (PW) Doppler signals of a Multi-Gated Doppler (MGD) signal is provided. The method may include identifying a gate corresponding with a selected anatomical structure. The method may include analyzing an MGD signal to track the selected anatomical structure over an extended period of time by selecting, at a plurality of sample times during the extended period of time, a PW Doppler signal from a plurality of PW Doppler signals of the MGD signal. Each of the selected PW Doppler corresponds with the selected anatomical structure at the particular sample time. The method may include presenting a continuous PW Doppler signal generated from each of the PW Doppler signals selected at each of the sample times during the extended period of time at a display system.