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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. 5.

Fig. 5

The frequency-offset Cartesian feedback system incorporates RF SPDT switches to inject a test signal and perform an autocalibration.