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Tilted-CAIPI for highly accelerated distortion-free EPI with point spread function (PSF) encoding
| Content Provider | Scilit |
|---|---|
| Author | Dong, Zijing Wang, Fuyixue Reese, Timothy G. Manhard, Mary Katherine Bilgic, Berkin Wald, Lawrence L. Guo, Hua Setsompop, Kawin |
| Copyright Year | 2018 |
| Description | Journal: Magnetic Resonance in Medicine To develop a method for fast distortion- and blurring-free imaging. EPI with point-spread-function (PSF) mapping can achieve distortion- and blurring-free imaging at a cost of long acquisition time. In this study, an acquisition/reconstruction technique, termed "tilted-CAIPI," is proposed to achieve >20× acceleration for PSF-EPI. The proposed method systematically optimized the k-space sampling trajectory with B0 -inhomogeneity-informed reconstruction, to exploit the inherent signal correlation in PSF-EPI and take full advantage of coil sensitivity. Susceptibility-induced phase accumulation is regarded as an additional encoding that is estimated by calibration data and integrated into reconstruction. Self-navigated phase correction was developed to correct shot-to-shot phase variation in diffusion imaging. Tilted-CAIPI was implemented at 3T, with incorporation of partial Fourier and simultaneous multislice to achieve further accelerations. T2 -weighted, T2 * -weighted, and diffusion-weighted imaging experiments were conducted to evaluate the proposed method. The ability of tilted-CAIPI to provide highly accelerated imaging without distortion and blurring was demonstrated through in vivo brain experiments, where only 8 shots per simultaneous slice group were required to provide high-quality, high-SNR imaging at 0.8-1 mm resolution. Tilted-CAIPI achieved fast distortion- and blurring-free imaging with high SNR. Whole-brain T2 -weighted, T2 * -weighted, and diffusion imaging can be obtained in just 15-60 s. |
| Related Links | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6258292/pdf |
| Ending Page | 392 |
| Page Count | 16 |
| Starting Page | 377 |
| e-ISSN | 15222594 |
| DOI | 10.1002/mrm.27413 |
| Journal | Magnetic Resonance in Medicine |
| Issue Number | 1 |
| Volume Number | 81 |
| Language | English |
| Publisher | Wiley-Blackwell |
| Publisher Date | 2018-09-05 |
| Access Restriction | Open |
| Subject Keyword | Journal: Magnetic Resonance in Medicine Radiology, Nuclear Medicine and Imaging Diffusion Imaging Distortion Correction Echo-planar Imaging Parallel Imaging Point Spread Function Mapping |
| Content Type | Text |
| Resource Type | Article |
