Table 1.

Parameters for five pulse sequences

Row	Sequence	tBp (ms)	tIR (ms)	(ms)	(ms)	tE1 (ms)	tE2 (ms)	No. echoes	No. averages	No. PE steps	PE resolution (mm)	FE resolution (mm)	Acquisition time
1		420	—	—	18–7,018	74	—	1	4	—	—	2.5	5 min, 32 s
2		70–720	—	—	18	74	—	1	4	—	—	2.5	1 min, 34 s
3	CPMG/IR CPMG	500/500	—/77	—/90	18/18	74/74	169/169	8/8	6/6	54/54	1.9	2.5	25 min, 52 s
4		500	—	—	18–4,018	74	—	1	1	47	2.5	2.5	19 min, 20 s
5		500	—	—	18	74	169	8	2	61	1.9	2.5	4 min, 26 s

, 1D spin echo sequence to acquire T₁ in B₀; , 1D spin echo sequence to acquire T₁ in B_p; CPMG/IR CPMG, interleaved CPMG and IR-CPMG sequences for 2D brain imaging; , spin echo sequence to obtain 2D T₁ map; , spin echo sequence to obtain 2D T₂ map.