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Table 3: Comparison of group A and B values for rTmax, MS, and FWHM for 6 different ROIs
ROI Group A Group B P Value
Stenosis (n = 70) Healthy (n = 56)
rTmax 
    M2 0.77 ± 0.52 0.58 ± 0.32 .005^{^a}
    PV 5.08 ± 1.32 4.38 ± 1.38 .001^{^a}
    SSS 6.35 ± 1.79 5.44 ± 1.44 .001^{^a}
    M1 0.66 ± 0.31 0.46 ± 0.46 .001^{^a}
    SS 6.71 ± 1.91 5.91 ± 1.67 .004^{^a}
    JV 7.29 ± 1.77 6.60 ± 1.62 .008^{^a}
MS 
    M2 337.15 ± 166.18 390.39 ± 166.98 .03^{^a}
    PV 159.34 ± 73.36 170.56 ± 99.95 .43
    SSS 103.78 ± 57.8 134.38 ± 111.07 .03^{^a}
    M1 331.59 ± 144.43 454.44 ± 320.48 .003^{^a}
    SS 100.32 ± 58.22 97.02 ± 47.17 .699
    JV 116.78 ± 63.13 136.22 ± 109.63 .185
FWHM 
    M2 2.54 ± 1.14 2.09 ± 0.70 <.001^{^a}
    PV 2.84 ± 2.37 2.74 ± 1.65 .74
    SSS 3.49 ± 2.38 3.86 ± 0.75 .607
    M1 3.57 ± 1.90 2.78 ± 0.92 .002^{^a}
    SS 4.33 ± 1.83 3.72 ± 1.17 .61
    JV^{^b} NA NA NA
Note:—SS indicates sigmoid sinus; JV, internal jugular vein.
↵a Statistically significant difference (t test, P < .05).
↵b The FWHM of the JV was not applicable because the DSA acquisition terminated before the waveform of the JV dropped in most cases.

ROI	Group A	Group B	P Value
ROI	Stenosis (n = 70)	Healthy (n = 56)	P Value
rTmax
M2	0.77 ± 0.52	0.58 ± 0.32	.005^{^a}
PV	5.08 ± 1.32	4.38 ± 1.38	.001^{^a}
SSS	6.35 ± 1.79	5.44 ± 1.44	.001^{^a}
M1	0.66 ± 0.31	0.46 ± 0.46	.001^{^a}
SS	6.71 ± 1.91	5.91 ± 1.67	.004^{^a}
JV	7.29 ± 1.77	6.60 ± 1.62	.008^{^a}
MS
M2	337.15 ± 166.18	390.39 ± 166.98	.03^{^a}
PV	159.34 ± 73.36	170.56 ± 99.95	.43
SSS	103.78 ± 57.8	134.38 ± 111.07	.03^{^a}
M1	331.59 ± 144.43	454.44 ± 320.48	.003^{^a}
SS	100.32 ± 58.22	97.02 ± 47.17	.699
JV	116.78 ± 63.13	136.22 ± 109.63	.185
FWHM
M2	2.54 ± 1.14	2.09 ± 0.70	<.001^{^a}
PV	2.84 ± 2.37	2.74 ± 1.65	.74
SSS	3.49 ± 2.38	3.86 ± 0.75	.607
M1	3.57 ± 1.90	2.78 ± 0.92	.002^{^a}
SS	4.33 ± 1.83	3.72 ± 1.17	.61
JV^{^b}	NA	NA	NA