RT Journal Article
SR Electronic
T1 Reduction of the Radiation Dose for Multidetector Row CT Angiography of Cerebral Aneurysms Using an Edge-Preserving Adaptive Filter: A Vascular Phantom Study
JF American Journal of Neuroradiology
JO Am. J. Neuroradiol.
FD American Society of Neuroradiology
SP 827
OP 829
DO 10.3174/ajnr.A1798
VO 31
IS 5
A1 S. Kakeda
A1 Y. Korogi
A1 M. Ogawa
A1 K. Otsubo
A1 Y. Morishita
YR 2010
UL http://www.ajnr.org/content/31/5/827.abstract
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