US 12,213,772 B2
Systems and methods for remotely tracking life signs with a millimeter-wave radar
Tom Harel, Shefayim (IL); Yuval Lomnitz, Herzeliya (IL); Michael Orlovsky, Hod Hasharon (IL); Shay Moshe, Petach Tikva (IL); Naftali Chayat, Kfar Saba (IL); Alexei Khazan, Rosh Haayin (IL); Mark Popov, Ramat Gan (IL); Rohi Halimi, Shokeda (IL); and Harel Golombek, Netanya (IL)
Appl. No. 17/800,643
Filed by VAYYAR IMAGING LTD., Yehud (IL)
PCT Filed Feb. 18, 2021, PCT No. PCT/IB2021/051380
§ 371(c)(1), (2) Date Aug. 18, 2022,
PCT Pub. No. WO2021/165873, PCT Pub. Date Aug. 26, 2021.
Claims priority of provisional application 63/135,782, filed on Jan. 11, 2021.
Claims priority of provisional application 63/069,050, filed on Aug. 23, 2020.
Claims priority of provisional application 63/030,943, filed on May 28, 2020.
Claims priority of provisional application 63/021,373, filed on May 7, 2020.
Claims priority of provisional application 62/977,902, filed on Feb. 18, 2020.
Prior Publication US 2023/0337928 A1, Oct. 26, 2023
Int. Cl. A61B 5/05 (2021.01); G01S 7/41 (2006.01); G01S 13/534 (2006.01)
CPC A61B 5/05 (2013.01) [G01S 7/415 (2013.01); G01S 13/534 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method for monitoring life signs in a subject within a target region, the method comprising:
providing a radar unit comprising:
at least one transmitter antenna connected to an oscillator and configured to transmit electromagnetic waves into the target region, and
at least one receiver antenna configured to receive electromagnetic waves reflected by objects within the target region and operable to generate raw data;
providing a processor unit configured to receive raw data from the radar unit and operable to identify oscillating signals therein;
the radar transmitting and receiving scanning radiation over the target region;
the radar generating series of frames, each frame comprising an array of complex values representing radiation reflected from each voxel of the target region during a given time segment;
the processor collating a series of complex values for each voxel representing reflected radiation for the associated voxel in multiple frames;
for each voxel determining a center point in the complex plane;
determining a phase value for each voxel in each frame;
generating a smooth waveform representing phase changes over time for each voxel;
selecting a subset of voxels indicative of an oscillating signal; and
extracting life signs parameters from the oscillating signal, and
wherein the step of selecting a subset of voxels indicative of an oscillating signal comprises:
generating a line segment model for the oscillating signal;
extracting characteristic features from the line segment model; and
executing a verification function to determine if the line segment model indicates a true-breathing signal.