Table 2. OAI MR QA acquisition parameters.

Options that were selected to reduce artifacts or improve the accuracy and precision of quantitative measurements include no phase or readout partial Fourier.

	Monthly OAI				Monthly ACR		Annual ACR Additional
	2D TSE IW	2D TSE IW	3D DESS	2D MSME SE	2D TSE IW*	2D TSE IW	2D SE T1W	2D SE PD/T2W
Plane	Sagittal	Axial	Sagittal	Sagittal	Sagittal	Axial	Axial	Axial
Matrix (phase)	307	307	307	269	555	555	256	256
Matrix (freq)	384	384	384	384	704	704	256	256
No. of slices	7	7	160	21	1	11	11	11
FOV (mm)	140	140	140	120	250	250	250	250
Slice thickness (mm)	3	3	0.7	3	20	3	5	5
Skip (mm)	6	6	0	0.5	10	7	5	5
Flip Angle (deg)	180	180	25	90	180	180	90	90
TE/TI (ms)	29	29	4.7	10, 20, 30, 40, 50, 60, 70	29	29	20	20 / 80
TR (ms)	1750	1750	16.3	2700	1000	1750	500	2000
BW (Hz/pixel)	352	352	183	250	355	355	300	300
NAV (NEX)	1	1	1	1	2	2	1	1
Echo train length	5	5	1	1	5	5	1	1
Phase Encode Axis	A/P	A/P	A/P	A/P	A/P	A/P	A/P	A/P
Slice Partial Fourier	1	1	0.75	0.75	1	1	1	1
X-Resolution (mm)	0.365	0.365	0.365	0.313	0.355	0.355	0.977	0.977
Y-Resolution (mm)	0.456	0.456	0.456	0.446	0.450	0.450	0.977	0.977
Scan time (min)	1.8	1.8	10.5	10.6	4.5	3.3	2.8	8.5

^*The sagittal TSE IW ACR acquisition initially used 256×256 in plane resolution which resulted in pixel dimension 0.98mm×0.98mm.