Fig 1.
Collateral status on dynamic 4D CTA as measured by collateral grading scale (CGS).
White arrow indicates the site of occlusion. Top two rows: a patient with a right MCA M1 segment occlusion and good collaterals as CGS score of 2: rLMC score on peak phase (rLMC-P) = 15, and rLMC score on tMIP (rLMC-M) = 18. Middle two rows: a patient with a right ICA occlusion and intermediate collaterals as CGS score of 1 (rLMC-P = 13 and rLMC-M = 15). Bottom two rows: a patient with a right ICA occlusion and poor collaterals as CGS score of 0 (rLMC-P = 3 and rLMC-M = 4).
Fig 2.
Inclusion and exclusion flow chart.
Table 1.
Baseline characteristics of patients.
Table 2.
Univariate comparison for baseline clinical and imaging data.
Table 3.
Clinical and imaging characteristics stratified by CGS score.
Fig 3.
Clinical outcome measured on mRS score at day 90 stratified by CGS score and recanalization (AOL score ≥ 2).