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. Author manuscript; available in PMC: 2012 Feb 1.
Published in final edited form as: IEEE Trans Med Imaging. 2010 Oct 18;30(2):512–522. doi: 10.1109/TMI.2010.2087768

Fig. 11.

Fig. 11

Amplitude and phase distortion of a VSS pulse: comparison between reference signal and measured signal obtained with the power amplifier driven directly (left) and with the same amplifier after addition of the control loop (right). The first two upper panels show real and imaginary parts of the signal; the bottom two, amplitude and phase errors.