  Magneto-acoustic tomography combines near-field radio-frequency (RF) and
ultrasound with the aim of creating a safe, high resolution, high contrast
hybrid imaging technique. We present continuous-wave magneto-acoustic imaging
techniques, which improve SNR and/or reduce the required peak-to-average
excitation power ratio, to make further integration and larger fields of view
feasible. This method relies on the coherency between RF excitation and the
resulting ultrasound generated through Lorentz force interactions, which was
confirmed by our previous work. We provide detailed methodology, clarify the
details of experiments, and explain how the presence of magneto-acoustic
phenomenon was verified. An example magneto-acoustic B-scan image is acquired
in order to illustrate the capability of magneto-acoustic tomography in
highlighting boundaries where electrical conductivity alters, such as between
different tissues.
