Projects/Diffusion/2007 Project Week Contrasting Tractography Measures/Acquisition Parameters

DTI data:

3 Tesla Dataset

• 3 Tesla GE system was used to acquire data (General Electric Medical Systems, Milwaukee, WI)
• We used Echo Planar Imaging (EPI) DTI Tensor acquisiton with double echo option enabled, in order to reduce eddy-current related distortions.
• 8 Channel Head Coil was used to reduce the impact of EPI spatial distortions, and ASSET (Array Spatial Sensitivity Encoding Techniques, GE) with a SENSE-factor (speed-up) of 2 was used.
• Acquisition parameters were as follows: 51 directions with b=700, 8 baseline scans with b=0, TR 17000 ms, TE 78 ms, FOV 24 cm, 144 x 144 encoding steps, 1.7 mm slice thickness. The total scan time for the sequence was 17 minutes.

MIND Dataset

• 1.5 T Siemens using 8-Channel Coil
• 60 gradient directions, 10 baselines, b = 700.
• TR = 8900 ms, TE = 80 ms, FOV = 256 mm, 2.0 mm voxel size, 2 mm slice thickness, 128 x 128 x 64 matrix size.
• Scan time: 10:32 min

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