Detection of the heartbeat in cranial accelerometer data using independent component analysis

A computer-implemented method for determining a heartbeat signal describing the heartbeat of a patient in the time domain, the method comprising:

• a) obtaining, from a plurality of acceleration sensors by at least one processor, acceleration measurement data describing an acceleration in the time domain of an anatomical body part measured on an external surface of the anatomical body part;
• b) determining, by the at least one processor, component analysis data describing a result of an independent component analysis in the time domain of the acceleration measurement data;
• c) acquiring, at the at least one processor, heartbeat template data describing template shapes of heartbeat in the time domain;
• d) determining, by the at least one processor and based on the component analysis data and the heartbeat template data, recurrent shape data describing a recurrence of certain signal shapes in the component analysis data;
• e) determining, by the at least one processor and based on the recurrent shape data, heartbeat signal data describing a time series of the heartbeat.

A non-transitory computer-readable program storage medium on which a program is stored which, when executed by at least one processor of at least one computer, causes the at least one computer to perform a method for determining a heartbeat signal describing the heartbeat of a patient in the time domain, the program for the method configures the at least one processor to:

• obtain, from a plurality of acceleration sensors , acceleration measurement data describing an acceleration in the time domain of an anatomical body part measured on an external surface of the anatomical body part;
• determine component analysis data describing a result of an independent component analysis in the time domain of the acceleration measurement data;
• acquire heartbeat template data describing template shapes of heartbeat in the time domain;
• determine, based on the component analysis data and the heartbeat template data, recurrent shape data describing a recurrence of certain signal shapes in the component analysis data;
• determine, based on the recurrent shape data, heartbeat signal data describing a time series of the heartbeat.