ArticlePloS one2015
Distortion correction in EPI using an extended PSF method with a reversed phase gradient approach.
Article in PloS one, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.
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Who cites it
20 citing papers in PubMed.
- Robustness of NeuroMark-Derived Functional Networks to fMRI Spatial Normalization Across the Human Lifespan.bioRxiv : the preprint server for biology · 2026Article
- Local field potential signal transmission is correlated with the fractional anisotropy measured by diffusion tractography.Brain communications · 2025Article
- Artificial intelligence for neuro MRI acquisition: a review.Magma (New York, N.Y.) · 2024Review
- Three-dimensional echo-shifted EPI with simultaneous blip-up and blip-down acquisitions for correcting geometric distortion.Magnetic resonance in medicine · 2023Article
- Minimizing susceptibility-induced BOLD sensitivity loss in multi-band accelerated fMRI using point spread function mapping and gradient reversal.Physics in medicine and biology · 2023Article
- Comprehensive ultrahigh resolution whole brain in vivo MRI dataset as a human phantom.Scientific data · 2021Article
- Quantitative Assessment of the Impact of Geometric Distortions and Their Correction on fMRI Data Analyses.Frontiers in neuroscience · 2021Article
- Joint BMagnetic resonance imaging · 2020Article
- EPI distortion correction for concurrent human brain stimulation and imaging at 3T.Journal of neuroscience methods · 2019Article
- Evaluating corrections for Eddy-currents and other EPI distortions in diffusion MRI: methodology and a dataset for benchmarking.Magnetic resonance in medicine · 2019Article
- Model-based reconstruction framework for correction of signal pile-up and geometric distortions in prostate diffusion MRI.Magnetic resonance in medicine · 2019Article
- Tilted-CAIPI for highly accelerated distortion-free EPI with point spread function (PSF) encoding.Magnetic resonance in medicine · 2019Article
- Distortion correction of echo planar images applying the concept of finite rate of innovation to point spread function mapping (FRIP).Magma (New York, N.Y.) · 2018Article
- Model-based iterative reconstruction for single-shot EPI at 7T.Magnetic resonance in medicine · 2017Article
- The impact of T1 versus EPI spatial normalization templates for fMRI data analyses.Human brain mapping · 2017Article
- Correction of metal-induced susceptibility artifacts for functional MRI during deep brain stimulation.NeuroImage · 2017Article
- Depth-dependence of visual signals in the human superior colliculus at 9.4 T.Human brain mapping · 2017Article
- Brain-heart interactions: challenges and opportunities with functional magnetic resonance imaging at ultra-high field.Philosophical transactions. Series A, Mathematical, physical, and engineering sciences · 2016Review
- A Hitchhiker's Guide to Functional Magnetic Resonance Imaging.Frontiers in neuroscience · 2016Review
- Modeling 2D spatio-tactile population receptive fields of the fingertip in human primary somatosensory cortex.Imaging neuroscience (Cambridge, Mass.)Article
Corrections and comments
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Authors and funding
5 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
In echo-planar imaging (EPI), such as commonly used for functional MRI (fMRI) and diffusion-tensor imaging (DTI), compressed distortion is a more difficult challenge than local stretching as spatial information can be lost in strongly compressed areas. In addition, the effects are more severe at ultra-high field (UHF) such as 7T due to increased field inhomogeneity. To resolve this problem, two EPIs with opposite phase-encoding (PE) polarity were acquired and combined after distortion correction. For distortion correction, a point spread function (PSF) mapping method was chosen due to its high correction accuracy and extended to perform distortion correction of both EPIs with opposite PE polarity thus reducing the PSF reference scan time. Because the amount of spatial information differs between the opposite PE datasets, the method was further extended to incorporate a weighted combination of the two distortion-corrected images to maximize the spatial information content of a final corrected image. The correction accuracy of the proposed method was evaluated in distortion-corrected data using both forward and reverse phase-encoded PSF reference data and compared with the reversed gradient approaches suggested previously. Further we demonstrate that the extended PSF method with an improved weighted combination can recover local distortions and spatial information loss and be applied successfully not only to spin-echo EPI, but also to gradient-echo EPIs acquired with both PE directions to perform geometrically accurate image reconstruction.
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