Optical Shape Sensing Device Registration via Force Detection
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Solution Overview
Problem
Current shape and position sensing technologies for minimally invasive medical procedures require multiple x-ray images to register optical shape sensing devices with patient anatomy, leading to increased radiation exposure and procedural complexity.
Innovation Solution
A method for registering shape sensing devices, such as optical shape sensing devices, with a previously obtained representation of a region of interest using force sensing to determine contact points and associate them with a common space, allowing for navigation without additional imaging, thereby reducing radiation exposure and simplifying procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple x-ray images are acquired to complete registration, then registration accuracy is improved, but radiation exposure to patient increases
Solution Approach 1:
The patent extracts the registration function from the x-ray imaging system and transfers it to the optical shape sensing device. By using the OSS device's intrinsic shape sensing capabilities to detect contact points with anatomical structures, the system achieves registration without requiring multiple x-ray images, thereby eliminating the radiation exposure while maintaining registration accuracy.
Solution Approach 2:
The patent replaces the mechanical/x-ray based registration system with an optical sensing system. Instead of using x-ray images to determine device position and orientation, the system uses optical fibers to sense shape and detect contact points through mechanical interaction with tissue, substituting radiological methods with optical-mechanical sensing.
2Measurement precision
If multiple x-ray images are acquired to complete registration, then registration accuracy is improved, but procedural complexity increases
Solution Approach 1:
The patent extracts the registration function from the complex multi-step x-ray imaging process and consolidates it into the optical shape sensing device. The OSS device independently performs shape sensing, contact point detection, and registration in an integrated manner, eliminating the need for separate x-ray imaging steps and reducing procedural complexity.
Solution Approach 2:
The optical shape sensing device performs self-registration by using its own shape sensing capabilities to detect contact points with anatomical structures. The device autonomously determines its position and orientation without requiring external x-ray imaging systems or manual registration procedures, thereby simplifying the overall process.
3Measurement precision
If additional imaging is performed to obtain 3D representations, then navigation accuracy is improved, but radiation exposure increases
Solution Approach 1:
The patent replaces x-ray imaging with optical sensing for navigation. The optical shape sensing device uses optical fibers to detect shape changes and contact points, providing three-dimensional navigation information through mechanical-optical interaction rather than ionizing radiation, thereby achieving navigation accuracy without radiation exposure.
Solution Approach 2:
The optical shape sensing device performs self-navigation by continuously monitoring its own shape and detecting contact points with anatomical structures. The device autonomously provides real-time position and orientation information for navigation without requiring additional external imaging, eliminating radiation exposure while maintaining navigation accuracy.
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 precise navigation of medical instruments within the body without the need for multiple x-ray images, reducing radiation exposure and procedural complexity while maintaining accurate shape and position sensing.
Implementation Method 1
determining points at which a distal end of the outer body contacts a surface of an object in the region of interest, based on forces exerted on the distal end when contacting the surface and detected by the force sensing region
Implementation Method 2
distributed strain measurements in the optical fiber are made using characteristic Rayleigh backscatter
Data Source
AI summary
Systems and methods are provided for registering a shape sensing device, such as an optical shape sensing (OSS) device, with a previously obtained three-dimensional (3D) representation of a region of interest, the shape sensing device including an outer body for maneuvering through a passage in the region of interest and a force sensing region integrated with the outer body. The method determines multiple points at which an end of the outer body contacts a surface of an object in the region of interest, based on forces exerted on the end when contacting the surface and detected by the force sensing region; and registering the determined points with points in the 3D representation of the region of interest so that the registered points are in a common space.