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PT  - JOURNAL ARTICLE
AU  - Kakeda, S.
AU  - Korogi, Y.
AU  - Ogawa, M.
AU  - Otsubo, K.
AU  - Morishita, Y.
TI  - Reduction of the Radiation Dose for Multidetector Row CT Angiography of Cerebral Aneurysms Using an Edge-Preserving Adaptive Filter: A Vascular Phantom Study
AID  - 10.3174/ajnr.A1798
DP  - 2010 May 01
TA  - American Journal of Neuroradiology
PG  - 827--829
VI  - 31
IP  - 5
4099  - http://www.ajnr.org/content/31/5/827.short
4100  - http://www.ajnr.org/content/31/5/827.full
SO  - Am. J. Neuroradiol.2010 May 01; 31
AB  - 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. CNRcontrast-to-noise ratioCTACT angiographyCTDIwweighted CT dose indexMTFmodulation transfer functionQ04mild QDSQ06heavy sharpening QDSQ08heavy smoothing QDSQDSquantum denoising systemROIregion of interestWweight of blending the smoothed image and the sharpened image