PMC4912348_01
(A) The contrast-enhanced MDCT angiography shows the styloid process causing a light pressure on the left ICA (arrowhead: ICA, arrow: styloid process). (B) Bilateral elongated styloid processes are seen on the coronal section MIP (Maximum Intensity Projection) images. (star: ICA, arrow: styloid process).
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Also, it was discovered that the left process was adjacent to the ICA and caused a slight compression on the ICA (Figure 1).
(A) The MDBT angiography shows the evident compression of the styloid processes on the left cervical rotational position (arrowhead: ICA, arrow: styloid process). (B) Compression finding on the coronal section and MIP images (arrowhead: styloid process, arrow: ICA). Imaging in the cervical rotation was performed with lower kV and lower contrast agent volume in order to reduce the amount of radiation and contrast agent-related burden, which is why the image quality is lower.
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As a result, it was observed that the compression on the ICA became evident (Figure 2).