Unsupervised Susceptibility Distortion Correction of EPI without Calibration Scans via Image Translation-Based Registration
Functional magnetic resonance imaging (fMRI) utilizes echo-planar imaging (EPI) to capture blood-oxygen-level-dependent (BOLD) signals with high temporal resolution. However, EPI is inherently sensitive to magnetic field inhomogeneities, resulting in susceptibility-induced geometric distortions along the phase-encoding (PE) direction. To correct these distortions, conventional approaches rely on additional calibration scans, such as field maps or reverse PE acquisitions, which are not always available in practice. To overcome this limitation, we propose SACRED, a calibration scan-free susceptibility distortion correction framework that corrects geometric distortions via image translation-...
| Authors | Wooseung Kim, Sung-Hong Park |
|---|---|
| Primary category | eess.IV |
| Published | 19 June 2026 |
| Last updated at source | 19 June 2026 |
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