Cerebellopontine angle and internal auditory canal: neurovascular anatomy on gas CT cisternograms

Conference · Fri Mar 01 00:00:00 EST 1985 · Radiology; (United States)

OSTI ID:5521810

Bird, C R; Hasso, A N; Drayer, B P; Hinshaw, Jr, D B; Thompson, J R

The authors reviewed 103 normal gas CT cisternograms to delineate the appearance of normal neurovascular structures in the cerebellopontine angle (CPA) and internal auditory canal (IAC). Cranial nerves VII and VIII were identified in the CPA in 97% of cases, either separately (53%) or as a bundle (44%). Intracanalicular branches of the VIIIth cranial nerve were identified in 20% of cases, and cranial nerve V was visualized in the CPA in 14%. The characteristic vascular loop, usually the anterior inferior cerebellar artery, was visible in 35% of cases, and, in 22% of visualized cases, was in an intracanalicular location. In 10% of cases, greater than 66% of the IAC was occupied by the neurovascular bundle. Familiarity with the normal anatomy and variations seen on gas CT cisternograms is necessary to prevent false-positive interpretations.

• Research Organization: Loma Linda Univ. School of Medicine, CA
• OSTI ID: 5521810
• Report Number(s): CONF-851152-; TRN: 85-015577
• Journal Information: Radiology; (United States), Vol. 154:3; Conference: 71. scientific assembly and annual meeting, Chicago, IL, USA, 17 Nov 1985
• Country of Publication: United States
• Language: English

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62 RADIOLOGY AND NUCLEAR MEDICINE
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