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AJNR - American Journal of Neuroradiology

Publication Preview: Published November 5, 2009

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American Journal of Neuroradiology
DOI 10.3174/ajnr.A1798

BRAIN

Reduction of the Radiation Dose for Multidetector Row CT Angiography of Cerebral Aneurysms Using an Edge-Preserving Adaptive Filter: A Vascular Phantom Study

S. Kakeda, Y. Korogi, M. Ogawa, K. Otsubo and Y. Morishita

From the Department of Radiology (S.K., Y.K., M.O.), University of Occupational and Environmental Health School of Medicine, Kitakyushu, Japan; and Medical Systems Division (K.O., Y.M.), Toshiba Corporation, Tokyo, Japan.

Please address correspondence to Shingo Kakeda, MD, Department of Radiology, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu 807-8555, Japan; e-mail: kakeda{at}med.uoeh-u.ac.jp

SUMMARY: To determine how much the radiation dose can be reduced in multidetector row CTA using a QDS, we performed CTA at various exposure settings using a vascular phantom simulating various aneurysms with superimposed bone skull structures, and postprocessed the image data with QDS. Our results demonstrated that the radiation dose of CTA can be reduced by at least 25% and the image quality for visualizing aneurysms can be preserved by applying the QDS.

Abbreviations: W, weight of blending the smoothed image and the sharpened image