MRI
SCA2 Diffusion Tensor Imaging

OpenNeuro Accession Number: ds001378Files: 254Size: 615.47MB

BIDS Validation

1 Error Invalid
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SCA2 Diffusion Tensor Imaging
SCA2 Diffusion Tensor Imaging
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  •   dataset_description.json
  •   participants.tsv
  •   README
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README

Subjects and MRI protocol

Nine SCA2 patients and 16 age-matched healthy controls, were examined twice (SCA2 patients 3.6±0.7 years and controls 3.3±1.0 years apart) on the same 1.5T MRI scanner (Philips Intera, Best, The Netherlands) by acquiring: - sagittal 3D T1-weighted turbo gradient echo images [repetition time (TR) = 8.1 ms, echo time (TE) = 3.7 ms, flip angle = 8°, inversion time = 764 ms, field of view (FOV) = 256 mm × 256 mm, matrix size = 256 × 256, 160 contiguous slices, slice thickness = 1 mm]; - axial diffusion-weighted images by using a single-shot echo-planar imaging sequence (TR = 9394 ms, TE = 89 ms, FOV = 256 mm × 256 mm, matrix size = 128×128, 50 slices, slice thickness = 3 mm, no gap, number of excitations = 3). Diffusion sensitizing gradients were applied along 15 non-collinear and non-coplanar directions using b-value of 0 (b0 image) and 1000 s/mm2.

Defacing

Pydeface was used on all anatomical images to ensure de-identification of subjects.

Comments

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By tjay.hennessy@gmail.com - over 2 years ago
Hi
Thanks for sharing your dataset, I'm using it to run some pipeline tests.
I found an issue with the t1w json's. The FlipAngle has a non-utf8 character in it which causes loading with json (in python) to fail..
So, the package pybids fails.
Best,
J
By tjay.hennessy@gmail.com - over 2 years ago
Hi
Thanks for sharing your dataset, I'm using it to run some pipeline tests.
I found an issue with the t1w json's. The FlipAngle has a non-utf8 character in it which causes loading with json (in python) to fail..
So, the package pybids fails.
Best,
J