Abstract #2753

Simple and Accurate Determination and Visualization of True Quadrature Settngs on Commercial Multiple Channel Transmitters Using Anti-Quad

Steven M. Wright¹, Ivan E. Dimitrov²,³, Sergey Cheshkov², Mary P. McDougall⁴, Craig R. Malloy²

¹Electrical and Computer Engineering, Texas A&M University, College Station, TX, United States; ²Advanced Imaging Research Center, University of Texas Southwestern Medical Center, Dallas, TX, United States; ³Philips Medical Systems, Cleveland, OH, United States; ⁴Biomedical Engineering, Texas A&M University, College Station, TX, United States

In addition to B1 homogeneity, searching for the most efficient (true quadrature) B1+ is desirable for a number of applications, especially those that require high power, e.g. proton decoupled spectroscopy. This abstract discusses a simple method for calibration of the drive phases in a two channel transmit system. Setting the phases for reverse circular polarization (anti-quad) provides greater sensitivity for the validation of the phase calibration for steering to a point of interest. In addition to its general applicability for coil calibration, this method may find application in steering the zero effective field needed for catheter-tracking based on reverse polarization.