Abstract:

Objective　 To describe imaging anatomy features of the aberrant cervical segment of internal carotid artery through CTA and MRI skill. 　Methods　The radiological data of 389 cases between Jan. 2012 to Dec. 2016 were collected and analyzed, who underwent head or head-neck CTA due to cerebrovascular disease or health examination. 15 cases were recognized with the aberrant cervical segment of internal carotid artery, 1 case of aberrant internal carotid artery was identified under 1.5T MRI. Abnormal location and the line exception form of cervical segment of internal carotid artery were observed and described. 　Results　Three forms of abnormal location of cervical segment of internal carotid artery coulb be find under CTA and  MRI: 1. submucosal position at the oropharynx; 2. submucosal position at the nasopharynx; 3. pass through the paprapharynx spcae and far away from the oropharynx or nasopharynx cavity. The line exception form included >or<-shaped, C-shaped, cross-U-shaped, S-shaped, Z- or N-shaped, coiling-shaped, or 3-shaped.   Conclusions　CTA examination can be used to observe the local axial abnormal contorts of the artery,  moreover, by VR post-processing technology, the overall artery contorts can be demonstrated, which is a reliable clue for clinical pharyngeal surgery and cerebrovascular disease diagnosis.

Key words: Cervical segment of internal carotid artery； , Anatomy, aberrant； , CT angiography