Table 2:

Comparison of ADC_DWI and ADC_{FLAIR DWI}

Tissue and Technique	ADC (10⁻⁶ mm² s⁻¹)		SNR		CNR
Tissue and Technique	Mean	σ	Mean	σ	Mean	σ
Air
DWI	320	58
FLAIR DWI	310	40
% Difference	3.1
CSF
DWI	3130	220	7.5	1.3	6.3	1.2
FLAIR DWI	970	330	2.3	0.9	1.3	0.9
% Difference	69.0		69.3		79.4
Globus pallidus
DWI	840	190	2.0	0.5	0.8	0.6
FLAIR DWI	730	110	1.7	0.3	0.7	0.4
% Difference	13.1		15.0		12.5
Gray matter
DWI	880	97	2.1	0.4	0.9	0.4
FLAIR DWI	750	66	1.8	0.4	0.7	0.4
% Difference	14.8		14.3		22.2
Insular cortex
DWI	950	91	2.3	0.4	1.1	0.4
FLAIR DWI	790	44	1.9	0.3	0.8	0.3
% Difference	16.8		17.4		27.3
Ischemic tissue
DWI	500	99	1.2	0.3
FLAIR DWI	460	100	1.1	0.2
% Difference	8.0		8.3
Putamen
DWI	710	120	1.7	0.4	0.5	0.4
FLAIR DWI	640	130	1.5	0.4	0.5	0.4
% Difference	9.9		11.8		0
White matter
DWI	760	140	1.8	0.4	0.6	0.4
FLAIR DWI	670	60	1.6	0.3	0.5	0.3
% Difference	11.8		11.1		16.7

Note.—One-way ANOVA of ADC_DWI and ADC_{FLAIR DWI} for each tissue showed that all means differed significantly (P < 0.5) for all tissues except the ADC of air, the SNR_ADC of the putamen, and white matter and CNR_ADC of the globus pallidus, putamen, and white matter (P > 0.5).