Table 3:

“Core” and “preferred” imaging protocols for diffusion-weighted imaging

Parameter	“Core”	“Preferred” No. 1 (High Angular Resolution)	“Preferred” No. 2 (More b-Values)
Orientation	Axial	Axial	Axial
Coil	Any	Phased array ≥8 channels	Phased array ≥8 channels
Readout	EPI	EPI	EPI
TR (ms)	∼9000	∼9000	∼9000
TE (ms)	Min	Min (<100)	Min (<100)
FOV (mm2)	256 × 256 or 350 (66% phase)	256 × 256 or 350 (66% phase)	256 × 256 or 350 (66% phase)
Matrix size	128 × 128	128 × 128	128 × 128
Sections/thickness (mm)	Any/≤3	59/2.7	59/2.7
Section gap (mm)	0	0	0
Voxel size (mm)	≤3 in all dimensions	Isotropic 2.73	Isotropic 2.73
Directions	≥12	64	≥12
Dual-echo	Any	No	No
Fat-suppression	Any	Yes	Yes
Phase-encode direction	A to P	A to P	A to P
BW (Hz/pixel)	1346	1346	1346
Parallel imaging factor	Any	2	2
b-value (s/mm2)	2 (0, ∼1000)	2 (0, 1300)	≥3 (eg, 0, ∼1000, ∼2000)
No. b=0 images	1	1 per 8 directions if allowed	1 per 8 directions if allowed

Note:—Min indicates minimum; A to P, anterior to posterior; BW, bandwidth.