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This picture denotes the use of mathematical model #1 (MM1). MM1 selected the dominant inflow by looking at the caliber of the A1 segment supplying the anterior communicating artery (AcoA) complex. The caliber of the A1 segment was assessed on the axial view of the computed tomography (CT) angiogram. In this picture, the three-dimensional (3D) reconstruction shows the A1 segments. The A1 labeled with the asterisk signifies the dominant inflow artery.
