What would be the clinical benefit of multiphase CTA over CTP?  

Fundamentally, no one has ever formally tested and proven that one imaging modality (or imaging approach) is better than another in any time window, for any kind of stroke, when the test is treatment decision-making. Therefore the brief answer to your question is: we do not know. The imaging approac...

A multiphase CTA is a CT angiogram where the contrast is injected and the patient is scanned in three phases: arterial, peak venous, and late venous. It is a good tool to assess collateral circulation as well as it gives an idea of how slow the perfusion is across an occlusion. The advantage over pe...

Excellent response @Michael. I suspect that centers experienced with CTP will continue to do it for the reasons you stated and those experienced with mCTA will continue that as well. As we move towards treating larger core LVOs, the utility of either study is going to be in more niche situations whe...

What well informed and thought out answers to the question above. CTA has always been faster and easier to interpret than CTP!