Table 1:

The differences of the mean values of CT perfusion parameters in each vascular territory between the normal and impaired cerebrovascular reserve groups

Variable	MCA	EBZ	ACA	BG
CBV
nCVR	0.99	0.97^*	1.14	1.15^*
iCVR	1.02	1.22^*	1.21	1.36^*
CBF
nCVR	0.94	1.07^*	0.90	1.24
iCVR	0.77	0.86^*	0.90	1.28
MTT
nCVR	1.15	0.91^*	1.29	0.92^*
iCVR	1.39	1.67^*	1.39	1.16^*
pcCBV (%)
nCVR	12.6	6.5^*	−6.5	17.3
iCVR	−2.2	−11.4^*	−3.9	−6.1
pcCBF (%)
nCVR	−7.4^*	−3.3^*	−5.9^*	3.7^*
iCVR	−35.1^*	−38.4^*	−30.0^*	−44.3^*
pcMTT (%)
nCVR	11.6^*	13.3^*	2.2^*	12.7^*
iCVR	33.4^*	35.6^*	43.1^*	34.6^*

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; nCVR, normal cerebrovascular reserve group; iCVR, impaired cerebrovascular reserve group; MCA, middle cerebral artery; EBZ, anterior external borderzone; ACA, anterior cerebral artery; BG, basal ganglia.
* Values are statistically significant using the Student t test (P < .05).