Abstract TP57: Predicting Regional Tissue Fate in Ischemic Stroke Using Color Coded mCTA-based Collaterals Assessment

Background and Purpose: Multiphase CT angiography (mCTA) assessment of collaterals has been proven to be predictive of tissue fate on follow-up imaging following an acute stroke. We used the GE FastStroke Software, a novel mCTA image analysis and visualization tool that color codes pial arteries and veins based on delay in vessel enhancement to predict regional tissue fate. Red colored collaterals represented no delay in enhancement, green represented a one phase delay and blue two phase delays. Methods: Forty patients with M1-middle cerebral artery occlusions were selected from the prospective database ProVeIT. Baseline CT as well as 24 to 36-hour CT/MRI were analyzed and scored regionally using the Alberta Stroke Program early CT scoring (ASPECTS). Regional vessel filling was assessed using color coded collateral maps, and given a score of 1,2 or 3 based on the predominant color of collaterals (1=blue, 2=green, 3=red). A score of 0 was given if there was less than 50% regional filling compared to the co...