AJDRAJNR - American Journal of Neuroradiology

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American Journal of Neuroradiology 2007;28:1690.

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American Journal of Neuroradiology
DOI 10.3174/ajnr.A0652

CASE REPORT

3D Rotational Digital Subtraction Angiography May Underestimate Intracranial Aneurysms: Findings from 2 Basilar Aneurysms

L.-D. Jou, A. Mohamed, D.H. Lee and M.E. Mawad

From the Department of Radiology (L.-D.J., D.H.L., M.E.M.), Baylor College of Medicine, Houston, Tex; Siemens Medical Solutions (A.M.), Princeton, NJ; and the Asan Medical Center (D.H.L.), 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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