Table 4:

Correlation coefficient between normalized baseline- and ACZ-challenged CT perfusion parameters and angiographic stages in each vascular territory

Variable	BG*	ACA*	MCA*	EBZ*
Observer 1
CBV vs AS	0.39†	0.29	0.29	0.69†
CBF vs AS	−0.16	−0.24	−0.50†	−0.33
MTT vs AS	0.47†	0.39†	0.52†	0.68†
PC of CBV vs AS	−0.36	0.11	−0.29	−0.19
PC of CBF vs AS	−0.65†	−0.40†	−0.81†	−0.82†
PC of MTT vs AS	0.25	0.32	0.33	0.48†
Observer 2
CBV vs AS	0.37	0.26	0.31	0.67†
CBF vs AS	−0.14	−0.27	−0.47†	−0.31
MTT vs AS	0.46†	0.38†	0.53†	0.64†
PC of CBV vs AS	−0.33	0.14	−0.29	−0.19
PC of CBF vs AS	−0.69†	−0.45†	−0.83†	−0.79†
PC of MTT vs AS	0.28	0.34	0.31	0.49†

Note:—CBV indicates normalized cerebral blood volume; CBF, normalized cerebral blood flow; MTT, normalized mean transit time; PC, percent change; AS, angiographic stage; BG, basal ganglia; ACA, anterior cerebral artery; MCA, middle cerebral artery; EBZ, anterior external border zone.

^*Values are Pearson correlation coefficient (r).

^†Values are statistically significant (P < .05).