Figure 7From: Prototype development of an electrical impedance based simultaneous respiratory and cardiac monitoring system for gated radiotherapy The output waveforms of both the respiratory monitoring unit and the cardiac monitoring unit together with the ECG signal recorded during (a) normal breathing, (b) rapid breathing, (c) slow breathing, and (d) breath holding. The subject was a 172-cm, 75-kg, 32-year-old male.Back to article page