Table 1.

Median (IQR) stroke lesion volumes from DWI, CBF, and Tmax with model-independent, model-dependent, and CTP4D software.

Parameter	Median (IQR) lesion volume [ml]
DWI lesion	47.6 (13.8–60.9)
Ischemic core
Model-independent CBF < 30%	18.1 (8.9–38.3)
Model-dependent CBF < 15% (calibrated)	22.0 (12.2–44.2)
CTP4D CBF < 15% (calibrated)	22.4 (14.1–42.0)
Model-dependent CBF < 30% (uncalibrated)	71.7 (52.9–121.7)
CTP4D CBF < 30% (uncalibrated)	65.7 (40.0–100.6)
Ischemic penumbra
Model-independent Tmax > 6 s	91.5 (57.4–149.3)
Model-dependent Tmax > 6 s	98.6 (69.3–157.8)
CTP4D Tmax > 6 s	89.3 (65.1–156.3)

IQR, indicates interquartile range; DWI, diffusion-weighted imaging; CBF, cerebral blood flow; CTP4D, CT Perfusion 4D.