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Detection of surface contact with optical shape sensing

A technology of optical shape sensing and surface contact, which is applied in the field of medical instruments and can solve problems such as the difficulty of knowing the degree of contact between devices

Active Publication Date: 2017-05-24
KONINKLJIJKE PHILIPS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult for the operator to know the extent to which the tip of the device is in contact with the vessel wall during navigation

Method used

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  • Detection of surface contact with optical shape sensing
  • Detection of surface contact with optical shape sensing
  • Detection of surface contact with optical shape sensing

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Embodiment Construction

[0016] In accordance with the present principles, systems and methods are disclosed to identify when a portion of an interventional device is in contact with a surface, such as a vessel wall, the surface of the skin, heart, bone, non-biological surfaces, and the like. Such techniques may preferably employ optical shape sensing signals, but various approaches may be employed. In some embodiments, a combination of techniques including, but not limited to, optical shape sensing may be employed to provide a meaningful indication of surface contact or wall scraping. Wall scraping information can be extracted from the optical shape sensing signal in a number of ways. These may include, for example, identifying the presence of vibrations by discontinuities in the torsional signal, identifying the presence of vibrations by frequency components of the torsional signal, detecting vibrations at the ends of the device from axial strain signals Compression, predicting wall contact from th...

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Abstract

A system for detecting instrument interaction with a surface includes a shape sensing enabled instrument (102) configured to pass along the surface. An interaction evaluation module(148)is configured to monitor shape sensing feedback from the instrument to determine modes of the shape sensing feedback that identify whether contact is made with the surface.

Description

technical field [0001] The present disclosure relates to medical instruments, and more particularly to shape sensing fibers employed in detecting interactions with surfaces. Background technique [0002] Optical shape sensing (OSS) uses light along multi-core optical fibers for device positioning and navigation during surgical interventions. One principle involved utilizes distributed strain measurements in optical fibers using characteristic Rayleigh backscattering or controlled grating patterns. The shape along the fiber starts at a particular point along the sensor, known as the starting point or z=0, and extends to the end of the fiber. For clinical use, the shape-sensing fibers are integrated into medical devices such as catheters, guidewires, endoscopes, robotic tools, and the like. This is usually done by placing fibers into lumens in the walls of the device. [0003] A plurality of shape parameters are provided from the reconstruction of the shape sensing data. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/353
CPCG01D5/353A61B2034/301A61B90/06A61B2090/065A61B2034/2061A61B34/20
Inventor M·L·弗莱克斯曼D·P·努南B·拉马钱德兰
Owner KONINKLJIJKE PHILIPS NV