Two New 3D Spiral-Based Trajectories

Dallas C. Turley¹, Nicholas R. Zwart¹, James G. Pipe¹

This work presents two new 3D trajectories comparable to conventional Stack of Spirals (SOS), namely Golden EquiDistant Interleaves (GEDI) and Spherical-GEDI (S-GEDI). Both trajectories have non-Cartesian aliasing patterns in all three directions. S-GEDI collects a sphere in k-space, is not sensitive to 3D blurring, and its PSF shows less ringing than SOS or GEDI, whose PSF are identical. Both trajectories are comparable to SOS in terms of scan time, SNR efficiency and ease of implementation.