NTU 90

This repository hosts the NTU‑90 diffusion MRI dataset, comprising 90 subjects scanned on a Siemens 3 T Trio using a diffusion spectrum imaging (DSI) protocol (203 directions, b‑max=6000 s/mm²) with 3 mm isotropic resolution and a one‑subject 2 mm DSI scan (b‑max=4000 s/mm²). Data have been converted to NIfTI for broad compatibility.

License

The NTU Lab grants a non‑commercial, educational, and research license for use of these images with the following conditions:

1. Always acknowledge the Advanced Biomedical MRI Lab, NTU Hospital in any publications or materials.
2. Redistribution is permitted only if this paragraph is included. Users assume all risk and liability.
3. NTU Lab provides no warranties of any kind, express or implied.
4. Commercial use is strictly prohibited without written consent from NTU Lab.

Data Acquisition

3 mm DSI (n=90)

• Scanner: Siemens Trio 3 T (8‑channel head coil)
• Sequence: Twice‑refocused spin‑echo EPI
• TE/TR: 142 ms / 9 100 ms
• Directions: 203 on a Cartesian grid, b‑max=6 000 s/mm²
• Voxel size: 2.9 × 2.9 × 2.9 mm³
• Scan time: ~45 min per subject

References

• Yeh, F.-C., & Tseng, W.-Y.I. NTU-90: a high angular resolution brain atlas constructed by q-space diffeomorphic reconstruction. NeuroImage 58(1), 91–99 (2011).
• Yeh, F.-C., Wedeen, V.J., & Tseng, W.-Y.I. Generalized q-sampling imaging. IEEE Trans. Med. Imaging 29(9), 1626–1635 (2010).