Nicholas Ryan Zwart1, James Grant Pipe1
This work focuses on the reduction of scan time required by the phase-contrast MRA technique. The proposed method consists of a 3D variable density spiral projection imaging trajectory (SPI) combined with a dual velocity encoding technique. SPI is a rapid imaging technique that improves acquisition time through the intrinsic efficiency of spirals and through undersampling. The dual-VENC method improves SNR by allowing low-VENC (high SNR) data to be reconstructed without phase aliasing of the velocity measurements.