Table 2:

Description of the posterior fossa lesions and comparison of mean values of SNR and CNR

	T2	DIR	Standard FLAIR	Optimized FLAIR	T2/DIR^{^a}	T2/Standard FLAIR^{^a}	T2/Optimized FLAIR^{^a}	Standard FLAIR/DIR^{^a}	Optimized FLAIR/DIR^{^a}	Optimized FLAIR/Standard FLAIR^{^a}
Mean (SD) No. of lesions
All locations	5.8 (8.6)	4.8 (7.0)	4.1 (4.6)	7.5 (9.0)	.6	.4	.04^{^b}	.3	.03^{^b}	.03^{^b}
Cerebellum	2.0 (4.5)	2.2 (3.6)	1.8 (2.1)	3.5 (4.8)	.1	.05^{^b}	7.10^−4b	.4	.01^{^b}	.02^{^b}
Brain stem	3.8 (4.8)	2.7 (3.9)	2.3 (2.8)	4.0 (4.9)	.2	.3	.3	.4	.2	.1
Mean SNR (SD)	112 (17.1)	16 (2.3)	34 (4.4)	29 (4.2)	5.10^−5b	8.10^−5b	7.10^−5b	2.10^−3b	3.10^−3b	.1
Mean CNR (SD)	45 (7.9)	9 (1.7)	11 (1.9)	14 (2.2)	4.10^−4b	4.10^−4b	6.10^−4b	.1	.01^{^b}	.03^{^b}

↵a P value after comparison of the 2 groups with the nonparametric Wilcoxon test.
↵b Significant differences after appropriate statistical correction.