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TABLE 2: MT MR imaging–derived parameters in control subjects imaged with different imaging systems
Parameter Control Group B (n = 10) Control Group C (n = 4) Relative Difference P Value
Mean ± SD SD/Mean Mean ± SD SD/Mean
Global MTR 38.97 ± 1.07 2.75% 27.56 ± 0.97 3.53% 34.31% <.001
Mean MTR 39.11 ± 1.04 2.65% 27.69 ± 0.96 3.45% 34.19% <.001
MTR histogram peak height 8.99 ± 1.03 11.45% 7.23 ± 0.52 7.17% 21.73% .007
MTR histogram peak position 42.10 ± 0.88 2.09% 28.75 ± 0.96 3.34% 37.69% <.001
MTR₂₅ 36.90 ± 1.29 3.49% 24.00 ± 1.41 5.89% 42.36% <.001
MTR₅₀ 40.70 ± 1.06 2.60% 28.00 ± 0.82 2.92% 36.97% <.001
MTR₇₅ 43.60 ± 0.97 2.22% 31.75 ± 0.96 3.02% 31.45% <.001
AMTR_2/3 57.03 ± 2.47 4.33% 59.50 ± 1.55 2.62% 4.25% .091
BSMTR_2/3 6.77 ± 0.86 12.70% 9.25 ± 0.57 6.16% 30.92% <.001

Parameter	Control Group B (n = 10)		Control Group C (n = 4)		Relative Difference	P Value
Parameter	Mean ± SD	SD/Mean	Mean ± SD	SD/Mean	Relative Difference	P Value
Global MTR	38.97 ± 1.07	2.75%	27.56 ± 0.97	3.53%	34.31%	<.001
Mean MTR	39.11 ± 1.04	2.65%	27.69 ± 0.96	3.45%	34.19%	<.001
MTR histogram peak height	8.99 ± 1.03	11.45%	7.23 ± 0.52	7.17%	21.73%	.007
MTR histogram peak position	42.10 ± 0.88	2.09%	28.75 ± 0.96	3.34%	37.69%	<.001
MTR₂₅	36.90 ± 1.29	3.49%	24.00 ± 1.41	5.89%	42.36%	<.001
MTR₅₀	40.70 ± 1.06	2.60%	28.00 ± 0.82	2.92%	36.97%	<.001
MTR₇₅	43.60 ± 0.97	2.22%	31.75 ± 0.96	3.02%	31.45%	<.001
AMTR_2/3	57.03 ± 2.47	4.33%	59.50 ± 1.55	2.62%	4.25%	.091
BSMTR_2/3	6.77 ± 0.86	12.70%	9.25 ± 0.57	6.16%	30.92%	<.001