CHENG LIMEI,CARLSON ERIC THOMAS,VAIRAVAN SRINIVASAN,XU MINNAN
申请号：
IN201647008925
公开号：
IN201647008925A
申请日:
2016.03.15
申请国别(地区):
IN
年份:
2016
代理人:
摘要：
System (10) for extracting a fetal heart rate from at least one maternal signal using a computer processor(26). The system includes sensors(12 18)attached to a patient to receive abdominal ECG signals and a recorder and digitizer(20)to record and digitize each at least one maternal signal in a maternal signal buffer(22A 22D). The system further includes a peak detector(40)to identify candidate peaks in the maternal signal buffer. The signal stacker(42)of the system stacks the divides at least one maternal signal buffer into a plurality of snippets each snippet including one candidate peak and a spatial filter(44)to identify and attenuate a maternal QRS signal in the plurality of snippets of the maternal signal buffer the spatial filter including at least one of principal component analysis and orthogonal projection to produce a raw fetal ECG signal which is stored in a raw fetal ECG buffer. The system further includes a fetal QRS identifier(46)for identifying peaks in the raw fetal ECG buffer by at least one of principal component analysis and a peak detector followed by rule based fQRS extraction and a merger(48)to calculate and merge the fetal heart rate from the identified peaks.
