Abstract #1846

Imaging High-Speed Jets Using Rapid Ungated Fourier Velocity Encoding

Hattie Zhi Chen Dong¹, Bob S. Hu^1,2, Juan M. Santos¹, Dwight G. Nishimura¹

¹Electrical Engineering, Stanford University, Stanford, CA, USA; ²Cardiology, Palo Alto Medical Foundation, Palo Alto, CA, USA

We propose the use of a rapid ungated Fourier velocity encoding (FVE) sequence for imaging high-speed jets. The sequence is made compact with FVE in the slice-select direction and readout perpendicular to the flow direction. It is applied continuously in an ungated fashion, producing an accurate time-averaged velocity spectrum in just a few seconds by averaging all k-space data. Phantom experiments and in vivo scans demonstrate the ability of this method to image high-speed jets, and results are verified using Doppler ultrasound.