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AJNR - American Journal of Neuroradiology

Published ahead of print on September 24, 2007
doi: 10.3174/ajnr.A0652

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American Journal of Neuroradiology 28:1690-1692, October 2007
© 2007 American Society of Neuroradiology

Case Report
BRAIN

3D Rotational Digital Subtraction Angiography May Underestimate Intracranial Aneurysms: Findings from Two Basilar Aneurysms

L.-D. Jou^a, A. Mohamed^b, D.H. Lee^a,c and M.E. Mawad^a

^a Department of Radiology, Baylor College of Medicine, Houston, Tex
^b Siemens Medical Solutions, Princeton, NJ
^c Asan Medical Center, Seoul, South Korea

Please address correspondence to Liang-Der Jou, PhD, Frensley Center for Imaging Research, Department of Radiology, BCM-360, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030; e-mail: jou{at}bcm.tmc.edu

SUMMARY: 3D digital subtraction angiography (DSA) allows clinicians to review intracranial aneurysms and other vascular lesions. We report 2 basilar aneurysms that were imaged by both 3D DSA and DynaCT. These 2 techniques produced very different aneurysm appearances. Anterior portions of the aneurysms were invisible on 3D DSA but were revealed by DynaCT. These aneurysms appeared to have been flattened by image artifacts in 3D DSA. Pulsation and gravity are 2 possible causes of aneurysm underestimation.

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