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Add EPI distortion phantom NIfTI data #177

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Add EPI distortion phantom NIfTI data
siria98 Sep 21, 2026
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Add EPI distortion phantom NIfTI data and update .gitignore
siria98 Sep 21, 2026
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Add EPI distortion phantom NIfTI data and README, update .gitignore
siria98 Sep 21, 2026
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5 changes: 5 additions & 0 deletions .gitignore
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temp
.vscode
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!phantoms/epi-distortion_phantom/data/*.nii
!phantoms/epi-distortion_phantom/b0-flipped/*.nii
!phantoms/epi-distortion_phantom/*.bval
!phantoms/epi-distortion_phantom/*.bvec
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# EPI Distortion Phantom

## Description
A QIBA diffusion phantom acquired on a 3T scanner, intended for testing EPI distortion correction pipelines.

## Contents
| File | Description |
|------|-------------|
| `data/data.nii` | Original DWI acquisition |
| `b0-flipped/data_flipped.nii` | DWI acquisition with flipped phase-encoding direction |
| `data_bvals.bval` | B-values |
| `data_bvecs.bvec` | Gradient directions |

## Usage
The two acquisitions (`data.nii` and `data_flipped.nii`) have opposite phase-encoding directions and can be used as input to EPI distortion correction tools such as FSL's `topup`.

## Notes
- Scanner: 3T
- Phantom: QIBA diffusion phantom
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