Fig. 2: Time–intensity curve.

Time–intensity curve extrapolated from flash replenishment cine acquisition from contrast-enhanced ultrasound examination depicting ultrasound contrast intensity over time (dotted curve) with overlying fitted curve (smooth curve) from which cerebral perfusion parameters are extrapolated including microvascular flow velocity (MFV), transit time, and microvascular blood flow (MBF). au arbitrary unit, secs seconds.