Table 2:

The correlation coefficient between the CT perfusion parameters and quantitative cerebrovascular reserve obtained by SPECT

Variable	MCA	EBZ	ACA	BG
CBV vs CVR	−0.04	−0.65^*	−0.15	−0.40
CBF vs CVR	0.39	0.14	−0.08	0.04
MTT vs CVR	−0.43^*	−0.56^*	−0.07	−0.45^*
pcCBV vs CVR	0.32	0.33	−0.26	0.41
pcCBF vs CVR	0.91^*	0.92^*	0.85^*	0.88^*
pcMTT vs CVR	−0.45^*	−0.52^*	−0.69^*	−0.42^*

Note:—CBV indicates cerebral blood volume; CBF, cerebral blood flow; MTT, mean transit time; pcCBV, percentage of change of CBV; pcCBF, percentage of change of CBF; pcMTT, percentage of change of MTT; CVR, cerebrovascular reserve; MCA, middle cerebral artery; EBZ, anterior external borderzone; ACA, anterior cerebral artery; BG, basal ganglia.
* Values are statistically significant using the Pearson correlation coefficient (P < .05).