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(a) Non-contrast CT image of the brain obtained in stroke window setting shows a hyperdense right middle cerebral artery (MCA; arrow). Its attenuation is close to that of a bone. In (b) standard and (c) bone window settings, the area of hyperdensity (arrow) can be seen located at the periphery of the MCA and appears curvilinear in shape. The overall imaging features are consistent with vascular calcification.
