Table 2.

Imaging parameters to acquire 30-direction HARDI data at 0.125 mm, 0.1 mm and 0.08 mm isotropic resolution from the middle brain FOE. Because of the use of blip gradients in the slice selection direction, the maximum slice selection gradients were larger than the maximum phase encoding gradients.

Resolution (isotropic)	0.125 mm	0.1 mm	0.08 mm
Scan time (minutes)	42	63	102
SNR of non-diffusion image	57 (n=1)	44 ± 2 (n=5)	33 ± 2 (n=5)
Duty cycle (%)	13.2	18.5	24.8
Maximum readout gradient (mT/m)	286	358	429
Maximum phase encoding gradient (mT/m)	144	180	216
Maximum slice selection gradient (mT/m)	360	444	562