Field-Correcting GRAPPA (FCG): a generalizable technique to correct spatiotemporal varying odd-even phase errors in EPI, SMS-EPI and 3D-EPI
Motivation: Odd-even phase errors are a long-standing problem for EPI, especially in cases with strong gradient systems and high field strengths. Goal(s): To enable high-quality odd-even correction in challenging cases using field-correcting GRAPPA (FCG). Approach: the FCG technique was applied to in vivo studies for 1-mm 3D EPI (CAIPI undersampling R=4) at 7T system, and 2D EPI (SMS=1-4, R=2-4) at 3T high-performance system through a straightforward and flexible pipeline for separate ghost correction and image reconstruction. Results: FCG produced the best correction and cleanest output on challenging cases. The pipeline is effective and flexible for different EPI structures and different vendors. Impact: A field-correcting GRAPPA (FCG) technique for high-quality correction of odd-even phase errors in EPI and a flexible pipeline for separate data correction and reconstruction was developed and validated, unleashing EPI applications for higher undersampling, stronger gradient systems, and higher fields.
Authors
- Carl‐Fredrik Westin (ORCID: https://orcid.org/0000-0002-1911-9728)
- Congyu Liao (ORCID: https://orcid.org/0000-0003-2270-276X)
- Yogesh Rathi (ORCID: https://orcid.org/0000-0002-9946-2314)
- Jon̈athan R. Polimeni (ORCID: https://orcid.org/0000-0002-1348-1179)
- Daniel P. Abraham (ORCID: https://orcid.org/0000-0003-0402-9620)
- Nastaren Abad (ORCID: https://orcid.org/0000-0002-7020-0492)
- Baolian Yang
- Laurentius Huber (ORCID: https://orcid.org/0000-0002-3291-2202)
- Adam B. Kerr (ORCID: https://orcid.org/0000-0002-3730-9373)
- Xiaozhi Cao (ORCID: https://orcid.org/0000-0001-5095-648X)
- Kawin Setsompop (ORCID: https://orcid.org/0000-0003-0455-7634)
- Nan Wang (ORCID: https://orcid.org/0000-0003-2297-0000)
- Qiang Liu (ORCID: https://orcid.org/0000-0003-2919-3195)
- Lipeng Ning
- Hua Wu (ORCID: https://orcid.org/0000-0001-8254-1561)
Publication Details
- Journal
- Proceedings on CD-ROM - International Society for Magnetic Resonance in Medicine. Scientific Meeting and Exhibition/Proceedings of the International Society for Magnetic Resonance in Medicine, Scientific Meeting and Exhibition
- Published
- 2025-09-16
- DOI
- https://doi.org/10.58530/2025/1363
- Primary Topic
- Advanced Electrical Measurement Techniques
- Type
- article
- Field-Weighted Citation Impact
- 0.00