Article Dans Une Revue Sensors and Actuators A: Physical Année : 2025

Magnetic tracking for catheterization procedure, using giant-magnetoresistance and space-varying magnetic field free point

Résumé

X-ray fluoroscopic imaging is the standard method for obtaining catheter position and monitoring the patient's vascular network during catheterization procedures. However, this method exposes both patients and doctors to ionizing radiation. To address this issue, we propose an alternative method for tracking the catheter inside the human body by integrating a magnetic sensor at the catheter tip and generating a known magnetic field (MF) around the operative zone. The catheter's position can then be determined by measuring this MF. Due to the mandatory small size of the catheter, we utilized giant-magnetoresistance (GMR) sensors for this tracking system. GMR sensors require only two wires for connection, have a wide bandwidth that allows flexibility in selecting the working frequency and can detect low-intensity MFs down to the nano Tesla range. Our method is based on the time detection of a moving null MF, known as the Field-Free Point (FFP) for MF generation. This approach requires only a single sensor smaller than 300 µm², making it suitable for any catheter. We constructed an experimental setup to demonstrate the feasibility of this method in one dimension and obtained promising performance results.
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Dates et versions

hal-04893416 , version 1 (17-01-2025)

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Citer

L. Paquet, A. Solignac, K. Tse Ve Koon, M. Ohta, N. Tsuruoka, et al.. Magnetic tracking for catheterization procedure, using giant-magnetoresistance and space-varying magnetic field free point. Sensors and Actuators A: Physical , 2025, 383, pp.116199. ⟨10.1016/j.sna.2025.116199⟩. ⟨hal-04893416⟩
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