Interventional Imaging Guidance with Video-Based Pose Tracking
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Solution Overview
Problem
Existing minimally invasive procedures rely heavily on imaging modalities like X-ray and fluoroscopy, leading to increased exposure to ionizing radiation and the need for additional hardware and complex workflows.
Innovation Solution
A device and method that uses a data input, processor, and output interface to track the pose and motion of interventional imaging devices using combined image data from different modalities, such as X-ray and bronchoscopy, to augment the X-ray images with the bronchoscope's position, reducing the reliance on continuous fluoroscopy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If X-ray imaging systems are used to track interventional devices, then positioning accuracy is improved, but radiation exposure increases
Solution Approach 1:
The patent uses video-based tracking to create a visual copy/representation of the interventional device's position and orientation, overlaying it on the X-ray images. This allows the system to maintain positioning accuracy through the video track while reducing the need for continuous X-ray imaging, thereby lowering radiation exposure.
Solution Approach 2:
Instead of continuous X-ray imaging, the system uses periodic video frames from the interventional device to update the position information. This periodic updating approach maintains sufficient positioning accuracy while significantly reducing the total radiation dose compared to continuous imaging.
2Measurement precision
If additional tracking hardware is added to navigation systems, then navigation precision is improved, but device complexity increases
Solution Approach 1:
The patent leverages the interventional device's own video imaging capability to perform tracking. The device uses its intrinsic imaging function to capture frames that can be processed to determine position and orientation, eliminating the need for separate external tracking hardware and reducing overall system complexity.
Solution Approach 2:
The video imaging system serves multiple functions: it provides both the visual information needed for navigation and the tracking data needed for position determination. This multi-functionality eliminates the need for dedicated tracking hardware, reducing device complexity while maintaining navigation precision.
3Speed
If continuous fluoroscopy is used for navigation, then real-time positioning is improved, but radiation exposure increases
Solution Approach 1:
The system replaces continuous fluoroscopy with periodic video frame acquisition and processing. By updating the position information at discrete time intervals from video frames, the system maintains real-time positioning capability while significantly reducing the total radiation dose associated with continuous X-ray imaging.
Solution Approach 2:
The patent creates a visual overlay copy of the device position and orientation information on the fluoroscopy images. This copied information is derived from video tracking data, allowing the system to provide real-time positioning feedback without requiring continuous fluoroscopy imaging, thus reducing radiation exposure.
Data Source
AI summary
The present invention relates to a device for guiding an interventional imaging device. In order to minimize the use of modalities like X-ray or CT, a device (10) for guiding an interventional imaging device is provided. The device comprises a data input (12), a data processor (14) and an output interface (16). The data input is configured to provide first image data as first data from a first imaging device. The first image data comprises a representation of the interventional imaging device inserted within a vessel structure of a subject. The first image data comprises image data relating to a first point in time. The data input is also configured to provide second data relating to a movement of the interventional imaging device. The second data relates to the first point in time and to at least a second point in time. The data processor is configured to estimate a pose of the interventional imaging device in the first image data. The data processor is also configured to track a relative motion of the interventional imaging device based on the second data. The data processor is further configured to compute an updated pose estimate of the interventional imaging device based on the estimated pose and the tracked relative motion. The data processor is furthermore configured to generate an updated indicator of the interventional imaging device based on the computed updated pose estimate. The data processor is also configured to augment the first image data with the updated indicator. The output interface is configured to provide the augmented first image data. In an example, the first imaging device is an X-ray imaging device and the second imaging device is a bronchoscopy imaging device.