US 12,376,823 B2
Fetal movement detection method from doppler ultrasound signal
Ying Zhang, Shanghai (CN)
Assigned to KONINKLIJKE PHILIPS N.V., Eindhoven (NL)
Appl. No. 16/640,531
Filed by KONINKLIJKE PHILIPS N.V., Eindhoven (NL)
PCT Filed Aug. 9, 2018, PCT No. PCT/EP2018/071592
§ 371(c)(1), (2) Date Feb. 20, 2020,
PCT Pub. No. WO2019/038097, PCT Pub. Date Feb. 28, 2019.
Claims priority of application No. PCT/CN2017/098594 (WO), filed on Aug. 23, 2017; and application No. 17194499 (EP), filed on Oct. 3, 2017.
Prior Publication US 2024/0415487 A1, Dec. 19, 2024
Int. Cl. A61B 8/08 (2006.01); A61B 8/00 (2006.01)
CPC A61B 8/0866 (2013.01) [A61B 8/488 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method of detecting fetal movements tuned for a specific fetus, comprising:
deriving a plurality of peaks from a Doppler ultrasound signal received from the fetus, each peak of the plurality of peaks being associated with an envelope of one of a plurality of signal segments of the Doppler ultrasound signal;
calculating a density of the peaks as a function of a plurality of peak amplitude grids, the density indicating the number of peaks with amplitude in each amplitude grid;
selecting a fetal movement threshold, tuned to the specific fetus, as the peak amplitude of the peak amplitude grid at which the calculated density of the peaks is maximum; and
determining that a Doppler ultrasound signal segment under test includes a fetal movement for the specific fetus by comparing the amplitude of a peak associating with the envelope of the Doppler ultrasound signal segment under test with the fetal movement threshold.