Assessment of Collateral Status by Dynamic CT Angiography in Acute MCA Stroke: Timing of Acquisition and Relationship with Final Infarct Volume.
Ido R van den WijngaardGhislaine HolswilderMarieke J H WermerJelis BoitenAle AlgraDiederik W J DippelJan Willem DankbaarBirgitta K VelthuisAnna M M BoersCharles B L M MajoieMarianne A A van WalderveenPublished in: AJNR. American journal of neuroradiology (2016)
Dynamic CTA provides a more detailed assessment of collaterals than single-phase CTA and has a stronger relationship with infarct volume at follow-up. The extent of collateral flow is more important in determining tissue fate than the velocity of collateral filling. The timing of dynamic CTA acquisition in relation to intravenous contrast administration is critical for the optimal assessment of the extent of collaterals.