PROPELLER DUO: Applied to Diffusion-Weighted Imaging

Xiaoli Zhao¹, Zhiqiang Li¹, Ajeetkumar Gaddipati¹

A novel pulse sequence, PROPELER DUO is presented to address the non-CPMG issue of diffusion-weighted (DW) PROPELLER. By the synchronized play-out of readout gradients, RF pulses and phaser gradients, PROPELLER DUO splits all the echoes in pathways into two self-coherent echo groups (E1 and E2) to form two perpendicular blades in a single k-space. This sequence is named as PROPELLER DUO, based on the facts that two echo groups are separated and form two blades in a single shot. Distortion-free DW imaging with whole brain coverage can be completed within 1 minute 30 seconds.