US 12,102,426 B2
Magneto-LC resonance technology for real-time respiratory motion monitoring
Manh-Huong Phan, Tampa, FL (US); Ongard Thiabgoh, Tampa, FL (US); and Tatiana Marie Eggers, Tampa, FL (US)
Assigned to University of South Florida, Tampa, FL (US)
Filed by UNIVERSITY OF SOUTH FLORIDA, Tampa, FL (US)
Filed on Dec. 14, 2022, as Appl. No. 18/080,925.
Application 18/080,925 is a division of application No. 16/465,956, granted, now 11,607,154, previously published as PCT/US2017/067860, filed on Dec. 21, 2017.
Claims priority of provisional application 62/437,257, filed on Dec. 21, 2016.
Prior Publication US 2023/0112341 A1, Apr. 13, 2023
Int. Cl. A61B 5/113 (2006.01); A61B 5/00 (2006.01); A61B 5/08 (2006.01); C22C 19/00 (2006.01); G01D 5/20 (2006.01)
CPC A61B 5/113 (2013.01) [A61B 5/0816 (2013.01); A61B 5/6823 (2013.01); A61B 5/742 (2013.01); C22C 19/00 (2013.01); G01D 5/2013 (2013.01); A61B 2562/0223 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A non-contact respiratory monitoring method, the method comprising:
changing a distance of a permanent magnet from a magnetic sensor coil, wherein the magnetic sensor coil is:
made of melt-extracted amorphous microwire with nominal composition Co69.25 Fe4.25Si13B12.5Nb1;
configured to detect motion of the permanent magnet relative to the magnetic microwire sensor coil;
oriented such that field lines emanating from the permanent magnet are parallel to a cross-sectional area of the magnetic microwire sensor coil and the magnetic microwire sensor coil winding direction; and
positioned a distance from the permanent magnet such that the magnetic microwire sensor coil is magnetically coupled to the permanent magnet and the change in the distance of the permanent magnet from the magnetic microwire sensor coil causes a change of impedance in the magnetic microwire sensor coil;
wherein an alternating voltage across the magnetic microwire sensor coil is modified by the change in impedance of the magnetic microwire sensor coil caused by the change in the distance of the permanent magnet from the magnetic microwire sensor coil, and
wherein the coil is made of a cobalt-rich magnetic microwire having a diameter ranging from about 20 μm to about 100 μm, and the coil includes about 5 to about 20 turns, has a length ranging from about 3 mm to about 15 mm, and has an internal diameter ranging from about 2 mm to about 5 mm.