Application of geometry distortion corrected SEPI sequence
Xu Y, Haacke M
Wayne State University, The MRI Institute for Biomedical Research
Geometric Distortion Corrected Segmented EPI (GDC-SEPI) utilizes a center out k-space trajectory and a phase map to smooth the phase discontinuities between segments. GDC-SEPI speeds up the acquisition while minimizing the distortion, fat shift, blurring and ghosting associated with SEPI. GDC-SEPI turns arterial signal bright compared with dark signal normally seen in a SEPI, which is important in Susceptibility Weighted Imaging (SWI) to keep the arteries bright so that they do not interfere with the hemorrhagic or venous signal being dark. GDC-SEPI is a good sequence to run in clinical environment for SWI to speed up acquisition.