Angiographic Correlation of CT Calcification in the Carotid Siphon
Richard J. Woodcock Jr
,a,
Jonas H. Goldsteina,
David F. Kallmesa,
Harry J. Clofta and
C. Douglas Phillipsa
a From the Department of Radiology, University of Virginia, Charlottesville (R.J.W., J.H.G., D.F.K., C.D.P.), and the Department of Radiology, Emory University, Atlanta, GA (H.J.C.).
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FIG 1. Schematic representation of CT calcification patterns. Calcification was classified as mild (thin, discontinuous); moderate (thin, continuous and thick, discontinuous); or severe (thick, continuous)
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FIG 2. A–D, CT patterns of calcification. 5-mm-thick axial CT scans at the level of the carotid siphon. Brain (top) and bone (bottom) windows are shown in each image.
A, Thin, discontinuous calcification, bilaterally.
B, Thin, continuous calcification, right side.
C, Thick, discontinuous calcification, right side.
D, Thick, continuous calcification, bilaterally.
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FIG 3. A–C, Angiographic stenoses. Digital subtraction angiograms of the intracranial circulation, lateral projections. Areas of interest are identified by the black arrows.
A, Mild irregularity of the carotid siphon.
B, Less than 50% diameter stenosis.
C, Greater than 50% diameter stenosis.
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