Rapid Cardiovascular Flow Quantitation Using Slice-Selective Spiral Fourier Velocity Encoding
Carvalho J, Nayak K
University of Southern California
Flow quantitation is important for the evaluation of many cardiovascular conditions. We propose the use of Fourier Velocity Encoding (FVE) with slice selection and low spatial resolution spiral readouts. Balancing time and velocity resolutions, and fully sampling kx,ky in one readout, we were able to acquire aortic valve flow time-velocity histograms with 52 ms temporal resolution and 12.5 cm/s velocity resolution in a single 8-second breath-hold. For measuring carotid flow, higher spatial resolution was obtained with longer acquisition time. This method was tested on flow phantoms and normal volunteers, and the results compared well with Doppler ultrasound.