Multiphase CT angiography collateral score in acute stroke

Dr Balint Botz et al.

Multiphase CT angiography (mCTA) collateral score is a simple scoring system that allows quick evaluation of collateral filling delay in acute ischemic stroke, and a better predictor of clinical outcome and eligibility for endovascular therapy than a decision based on single phase CT angiography1

mCTA collateral score 2

A score on a scale of 0 to 5 is given, with 5 being the mildest and 0 the most severe:

5 - no filling delay compared to the asymptomatic contralateral hemisphere, normal pial vessels in the affected hemisphere

4 - a filling delay of one phase in the affected hemisphere, but the extent and prominence of pial vessels is the same

3 - a filling delay of two phases in the affected hemisphere, or a delay of one phase with a significantly reduced number of vessels in the ischemic territory

2 - a filling delay of two phases in the affected hemisphere with a significantly reduced number of vessels in the ischemic territory, or one phase delay showing regions without visible vessels

1 - only a few vessels are visible in the affected hemisphere in any phase

0 - no vessels visible in the affected hemisphere in any phase

 

Generally, a score of 3 or below indicates a poor prognosis 1

 

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rID: 62280
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Cases and figures

  • Case 1: mCTAs score: 0
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