Question:
What’s the difference between extra-cranial carotid circulation and intra-cranial carotid circulation?
Answer:
Extra-cranial carotid circulation refers to imaging of the neck and head outside of the skull – the common carotid, the proximal internal carotid, and non-selective imaging of the external carotid and branches. Intra-cranial carotid circulation includes the distal internal carotid artery and cerebral arteries. The internal carotid artery begins outside of the skull as a cervical (neck) artery and then passes through a hole (foramen) in the skull to become an intracranial/cerebral artery.
CPT® copyright 2024 American Medical Association (AMA). All rights reserved.
Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
CPT is a registered trademark of the American Medical Association.
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