Low-field MR systems with state-of-the-art hardware may improve the accessibility of MRI. DWI is valuable for diagnosing diseases, while it requires multiple averages at low-field MRI considering SNR. Given similar acquisition time, multi-shot EPI DWI can be considered alternatively. Particularly, the tilted-CAIPI accelerated multi-shot PSF-EPI has been proposed in recent years to achieve fast distortion-free DWI. This study tested the feasibility of PSF-EPI on a high-performance 0.5T MR scanner, and proposed a method for further noise reduction using B0 field information. The results show that PSF-EPI eliminates distortions and improves structure fidelity at tissue boundaries compared with interleaved EPI.
This abstract and the presentation materials are available to members only; a login is required.