Table 2. Imaging parameters for 2-D EPI, 3-D PRESTO and 3-D FFE fMRI sequences with high temporal resolution and navigator pulse.
| Type of Scan | High temp. res. | High temp. res. & no nav. pulse | with nav. pulse | no nav. pulse | with nav. pulse |
| Sequence | 2D EPI | 3D PRESTO | 3D PRESTO | 3D FFE | 3D FFE |
| FOV (mm) | 220 (AP)×172.86 (RL)×8 (FH) | 170 (AP)×170 (RL)×16 (FH) | 170 (AP)×170 (RL)×12 (FH) | 170 (AP)×170 (RL)×21.28 (FH) | 170 (AP)×170 (RL)×21.28 (FH) |
| Voxel resolution (mm3) | 1.96×2.03×2.00 | 2.02×2.07×2.00 | 2.00×2.00×2.00 | 1.33×1.33×1.33 | 1.33×1.33×1.33 |
| Volume acquisition time (ms) | 423 | 346 | 360 | 2000 | 2000 |
| TR (ms) | 423 | 12 | 15 | 25 | 25 |
| TE (ms) | 20 | 19 | 22 | 17 | 17 |
| # Slices | 4 | 8 | 6 | 16 | 16 |
| SENSE | 3 (RL) | 2 (AP) | 2 (AP) | 3.1 (RL) | 3.1 (RL) |
| Flip Angle (deg) | 28 | 10 | 10 | 15 | 15 |
| # Dynamics | 200 | 265 | 265 | 150 | 150 |
| Scan Time (min:sec) | 1∶39 | 1∶43 | 1∶47 | 5∶5 | 5∶6 |
FOV is the field of view, TR is the repetition time, TE is the echo time and SENSE is the acceleration factor in the Right-Left (RL) and Anterior-Posterior (AP) planes.