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Table 1: 
Results of the ROI analysis for objective image quality and the calculated correlation coefficients for interobserver agreementa
Anatomic StructureMean Rater 1 (A.U.)Mean Rater 2 (A.U.)No.Pearson Correlation Coefficient RSignificance
Noisea4 ± 14 ± 1250.818<.001
Basilar artery1110 ± 2941170 ± 381250.852<.001
Brain stem176 ± 24179 ± 24250.895<.001
Vein of Galen1040 ± 3441020 ± 303230.910<.001
Transverse sinus (R)905 ± 280896 ± 276250.982<.001
Transverse sinus (L)878 ± 232902 ± 244250.982<.001
Basal vein (R)812 ± 283783 ± 243190.910<.001
Basal vein (L)847 ± 233839 ± 234240.936<.001
SPS (R)561 ± 186601 ± 183250.852<.001
SPS (L)537 ± 233612 ± 169250.741<.001
  • Note:—R indicates right; L, left; A.U., arbitrary units; No., number of cases.
  • ↵a For noise, the SD of the signal in the ROI is given; for all other ROIs, the mean signal is presented.