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Table 2: Estimated vessel width FWHM (millimeters) defined as the full width of the line profile at 50% 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 4.22 ± 0.58 4.23 ± 0.72 4.22 ± 0.55 .4812
A2 3.28 ± 0.47 3.31 ± 0.53 3.28 ± 0.45 .4105
A3 2.84 ± 0.45 2.88 ± 0.37 2.83 ± 0.47 .3345
V1 6.52 ± 1.31 6.67 ± 1.87 6.48 ± 1.14 .3135
V2 4.20 ± 0.69 4.02 ± 0.86 4.25 ± 0.64 .1269
V3 2.57 ± 0.55 2.25 ± 0.56 2.65 ± 0.52 .0055^a
↵a Significant (P < .05).

	All	Group 1	Group 2	T Test
A1	4.22 ± 0.58	4.23 ± 0.72	4.22 ± 0.55	.4812
A2	3.28 ± 0.47	3.31 ± 0.53	3.28 ± 0.45	.4105
A3	2.84 ± 0.45	2.88 ± 0.37	2.83 ± 0.47	.3345
V1	6.52 ± 1.31	6.67 ± 1.87	6.48 ± 1.14	.3135
V2	4.20 ± 0.69	4.02 ± 0.86	4.25 ± 0.64	.1269
V3	2.57 ± 0.55	2.25 ± 0.56	2.65 ± 0.52	.0055^a