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Table 1: Estimates of vessel sharpness (1 mm) defined as the reciprocal sum of the width from 25% to 75% of the maximum intensity increase in 3 arterial and 3 venous vessel segments and decreasing vessel diameters
All Group 1 Group 2 T Test
A1 0.39 ± 0.04 0.37 ± 0.03 0.40 ± 0.04 .0010^a
A2 0.41 ± 0.08 0.41 ± 0.10 0.41 ± 0.07 .4896
A3 0.47 ± 0.10 0.47 ± 0.12 0.47 ± 0.09 .4928
V1 0.30 ± 0.05 0.28 ± 0.04 0.30 ± 0.05 .0648
V2 0.35 ± 0.06 0.37 ± 0.08 0.34 ± 0.06 .0543
V3 0.52 ± 0.15 0.62 ± 0.24 0.49 ± 0.11 .0016^a
Note:—A1 indicates internal cerebral artery (lacerum segment, large artery); A2, middle cerebral artery (proximal segment “M1,” medium-sized artery); A3, anterior cerebral artery (small artery); V1, superior sagittal sinus (1 cm proximal of the confluens, large vein); V2, straight sinus (1 cm proximal of the confluens, medium-sized vein); V3, inferior sagittal sinus (1 cm proximal to the straight sinus, small vein).
↵a Significant (P < .05).