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. Author manuscript; available in PMC: 2015 Sep 5.
Published in final edited form as: IEEE J Biomed Health Inform. 2015 Jun 4;19(5):1549–1556. doi: 10.1109/JBHI.2015.2441876

Fig. 1.

Fig. 1

Block diagram illustrating the transfer function relating central cardiac (hemodynamic) forces to ballistocardiogram (BCG) signals measured with a modified weighing scale. The posture can both affect the source (via changes in angle) and system.