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Abstract #3802

Investigation of optimal NMR-on-a-chip sensor positions for monitoring physiological magnetic field changes

Fabian Bschorr1, Thomas Hüfken1, Tobias Lobmeyer1, Frederik Dreyer2, Julian Schüle1, Jianyu Zhao2, Jens Anders2,3,4, and Volker Rasche1,5
1Internal Medicine II, Ulm University Medical Center, Ulm, Germany, 2Institute of Smart Sensors, University of Stuttgart, Stuttgart, Germany, 3Institute for Microelectronics (IMS CHIPS), Stuttgart, Germany, 4Center for Integrated Quantum Science and Technology, Stuttgart, Germany, 5Core Facility Small Animal MRI, Ulm, Germany

Synopsis

Keywords: Bioeffects & Magnetic Fields, Bioeffects & Magnetic Fields

Motivation: NMR-based field probes have proven as alternative method for acquiring physiologically-related magnetic field changes. However, positioning of those might be challenging due to variations in breathing patterns and/or anatomy.

Goal(s): The goal of this work is to investigate different sensor positions to find optimal positions for measuring respiratory- but also cardiac-related magnetic field changes.

Approach: The NMR-on-a-chip sensor was positioned at 7 locations around the torso and the measurement results analysed with respect to the detectable physiological components.

Results: Anterior locations at height of the diaphragm and the cranial parasternal positions appear most promising for mapping of the respiration and cardiac motion, respectively.

Impact: In this work, different locations for contactless sensing of physiological motion with a NMR-on-a-chip sensor around the torso were investigated. It is shown that both contributions might be separated with either bandpass filtering or principal component analysis.

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