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TABLE 1: Summary of SNR and CNR Results
Images SNR CNR
GM WM GM-WM Lesion-GM Lesion-WM
Source 
 MP Rage 23.1 ± 5.2 27.8 ± 5.0 4.8 ± 1.5 16.3 ± 10.2 11.8 ± 10.3
 VIBE 26.1 ± 5.4 32.0 ± 6.3 5.9 ± 2.2 20.2 ± 11.3 14.3 ± 12.0
 P value .001 <.001 <.001 .002 .053
5-mm Reformations 
 MP RAGE 73.8 ± 14.6 89.2 ± 15.1 15.4 ± 4.1 38.9 ± 26.3 25.1 ± 26.1
 VIBE 77.5 ± 14.5 94.2 ± 16.3 16.8 ± 4.4 46.1 ± 26.4 30.0 ± 28.3
T1-weighted SE 96.1 ± 11.0 106.4 ± 10.1 10.2 ± 4.9 64.1 ± 37.9 54.1 ± 39.1
 P value^* <.001^† <.001^† <.001^† <.001^‡ <.001^†
Note.—Data are mean ratios ± SD.
↵* P values are based on analysis of variance.
↵† Paired Student t test demonstrated no significant difference between 5-mm VIBE and MP RAGE reformations.
↵‡ Student t test demonstrated a statistically significant difference between each pairing of images obtained with the three imaging methods.