[Retracted] Different Grades of Collateral Circulation for Evaluating Cerebral Hemodynamic Status in Carotid Artery Stenosis

Table 4

Correlation between cerebral CTP parameters and degree of carotid stenosis in selected ROIs.

ROIs	50–70%	70–90%	Near-occlusion	value
rMTT
Frontal lobe	1.033 ± 0.152	1.090 ± 0.292	1.235 ± 0.291	0.037^∗
Basal ganglia	1.027 ± 0.382	1.084 ± 0.342	1.144 ± 0.308	0.255
Temporal lobe	1.035 ± 0.422	1.374 ± 0.513	1.362 ± 0.919	0.331
rTTP
Frontal lobe	0.994 ± 0.070	1.021 ± 0.076	1.054 ± 0.084	0.026^∗
Basal ganglia	0.981 ± 0.075	1.048 ± 0.137	1.034 ± 0.072	0.065
Temporal lobe	0.994 ± 0.099	1.018 ± 0.059	1.044 ± 0.076	0.158

All data are means ± SE. Note: ROIs: regions of interest; rMTT: relative mean transit time; rTTP: relative time to peak. .