Dear freesurfers,
My data seems not to be T1-weighted by look ( http://www.youtube.com/watch?v=W8ZFGvGvHVc). Would you please help me further identify by reading the following experimental description?
Images were acquired with blood-oxygen level dependent (BOLD) imaging on a 3 T Siemens Trio Scanner (Bandettini, Wong, Hinks, Tikofsky, and Hyde, 1992). A five-minute magnetization prepared, rapid-acquisition gradient echo image (*MPRAGE*) was acquired for anatomic overlays of *functional*data and spatial normalization (T1 MN1 Template). BOLD imaging used a 33-slice whole-brain, single-shot gradient echo (GE) echo-planar (EPI) sequence (TR/TE = 2000/25 ms, FOV = 240 mm, matrix = 64 x 64, slice thickness/gap = 4/0 mm). This sequence delivers a nominal voxel resolution of 3 x 3 x 3 mm.
Also, if I do *mri_info *in freesurfer for the five sequences of the data, Series Number 1: TR: 8.6msec, TE: 4.00msec, T1: -1.00msec, Flip Angle: 20.00degrees Series Number 2: TR: 2000.00msec, TE: 25.0msec, T1: -1.00msec, Flip Angle: 90.00degrees Series Number 3: TR: 2300.00msec, TE: 2.96msec; T1: 900.00msec, Flip Angle: 90.00degrees Series Number 4&5: TR: 2000.00msec, TE: 25.00msec; T1: -1.00msec, Flipe Angle: 90.00degrees
Is my data NOT T1-weighted for sure?
Thank you very much!
Sincerely, Ye * *