Fig 2.

Illustrative case (an 81-year-old woman). A, Left common carotid artery (CCA) angiogram demonstrates severe stenosis of the internal carotid artery (ICA) with heavy calcification. B, The maximum intensity projection CT angiogram reveals severe calcification at the bifurcation of the carotid artery. C, At the narrowest portion of the ICA, the arc of the plaque calcification is 342°. D, Left CCA angiogram demonstrates excellent dilation. There is a 5% residual stenosis of the lesion after CAS.