Neurovascular Imaging

Table 5 Patient misclassification using 25 mL and 70 mL (EXTEND criteria) as the critical infarct volume

From: Can CT perfusion accurately assess infarct core?

		DWI				DWI
		≤25 mL	>25 mL	Kappa		≤70 mL	>70 mL	Kappa
AbsCBF	≤25 mL	29	6	0.439	≤70 mL	57	2	0.487
AbsCBF	>25 mL	10	15	0.439	>70 mL	0	1
AbsCBV	≤25 mL	27	5	0.422	≤70 mL	57	2
AbsCBV	>25 mL	12	15	0.422	>70 mL	0	1	0.487
rCBF	≤25 mL	32	4	0.610	≤70 mL	56	1
rCBF	>25 mL	7	17	0.610	>70 mL	1	2	0.649
rCBV	≤25 mL	29	3	0.558	≤70 mL	57	2
rCBV	>25 mL	10	18	0.558	>70 mL	0	1	0.487
CBV Tracing	≤25 mL	31	4	0.579	≤70 mL	53	1
CBV Tracing	>25 mL	8	17	0.579	>70 mL	4	2	0.405

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