Detection of Catheter Shape and Position Using a Flexible Magnetic Sensor

The use of a flexible magnetic loop sensor catheter with a model-based algorithm corrects probe coordinates to address impedance variations, ensuring accurate visualization and position detection within the body.

JP7711889B2Active Publication Date: 2025-07-23BIOSENSE WEBSTER (ISRAEL) LTD
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Patent Information

Application Number
JP2021077328
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2020-05-05
Filing Date
2021-04-30
Publication Date
2025-07-23
Estimated Expiration
2041-04-30

AI Technical Summary

Technical Problem

Existing position detection systems for medical probes within the body, such as catheters, face challenges with sudden variations in electrical impedance that confuse the physician's view, leading to inaccurate visualization of the probe's shape and position.

Method used

A method and system that utilize a flexible magnetic loop sensor (FLS) catheter with a model-based algorithm to correct probe coordinates by minimizing a cost function considering mechanical characteristics, strain, and voltage measurements, providing an accurate representation of the probe's shape and position.

Benefits of technology

Enables precise visualization of the probe's shape and position within the body by aligning measured coordinates with known mechanical characteristics, reducing distortion and improving the accuracy of medical procedures.

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Abstract

To detect the position of an object placed within a living body.SOLUTION: Methods, apparatus, and systems for medical procedures are disclosed herein for receiving an input of a plurality of measured coordinates of a respective plurality of position transducers of a probe inside a body of a subject, receiving a measured voltage measurement output by the probe, determining a cost function based on a model of known mechanical properties of the probe compared to the measured coordinates with respect to shapes that can be assumed by the probe in the body and further based on an expected voltage value compared to the measured voltage measurement, selecting a shape based on the cost function, generating corrected coordinates of the points along the probe based on the shape, and displaying a representation of the probe using the corrected coordinates.SELECTED DRAWING: Figure 1
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Citation Information

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