Average and Time-Resolved Dual Velocity Encoded Phase Contrast Vastly undersampled Isotropic Projection Imaging
Johnson K, Wieben O, Turski P, Mistretta C
University of Wisconsin-Madison
The velocity to noise ratio (VNR) of phase contrast data is linearly proportional to the magnitude of the first moment of the bipolar applied. In general, the bipolar induced phase can only be resolved to ; however, additional information or assumptions can extend that range. We propose time-resolved and time averaged dual velocity encoded (VENC) techniques, with minimal increases in scan time or artifact. Dual VENC sequences are shown to have higher SNR and VNR, as compared to single VENC sequences; as well as improved vessel characterization.