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AJNR - American Journal of Neuroradiology

Published ahead of print on January 9, 2008
doi: 10.3174/ajnr.A0893

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American Journal of Neuroradiology 29:660-662, April 2008
© 2008 American Society of Neuroradiology

Technical Note
BRAIN

Nonhelical Acquisition CT Angiogram after Aneurysmal Clipping: In Vitro Testing Shows Diminished Artifact

A.C. Mamourian^a, K. Erkmen^b and D.J. Pluta^a

^a Department of Radiology, Dartmouth-Hitchcock Medical Center, Lebanon, NH
^b Department of Neurosurgery, Dartmouth-Hitchcock Medical Center, Lebanon, NH

Please address correspondence to Alexander C. Mamourian, MD, Dartmouth-Hitchcock Medical Center, One Medical Center Drive, Lebanon, NH 03756; e-mail: alexander.mamourian{at}uphs.upenn.edu

SUMMARY: Imaging of the cerebral vessels with use of CT angiogram (CTA) after placement of aneurysmal clips is often limited by clip artifacts. We used a phantom to demonstrate a visible reduction in metal artifact when using the axial technique, compared with the usual CTA helical acquisition. This approach may have some advantage when used for CTA with 64-section scanners in the specific circumstance of immediate postoperative imaging after placement of cerebral aneurysmal clips.