Low doses can make DSCT cardiac perfusion routine
April 25, 2017 -- The latest generation dual-source CT (DSCT) scanner cuts the radiation dose of cardiac CT perfusion enough to make it suitable for daily practice, according to new research. Expanded z-axis coverage and better signal-to-noise ratios can offer more information on myocardial blood flow.
A Japanese study presented at ECR 2017 compared image quality and radiation dose when going from second-generation DSCT (Somatom Flash, Siemens Healthineers) with a third-generation system (Somatom Force, Siemens). The group from Mie University Hospital in Tsu examined patients with known or suspected coronary artery disease undergoing stress CT perfusion on the second-generation system and then the third-generation DSCT scanner. Comparing contrast-to-noise ratio and radiation dose between the two, the results showed better enhancement combined with radiation dose reductions of about one-third.
April 25, 2017 -- The latest generation dual-source CT (DSCT) scanner cuts the radiation dose of cardiac CT perfusion enough to make it suitable for daily practice, according to new research. Expanded z-axis coverage and better signal-to-noise ratios can offer more information on myocardial blood flow.
A Japanese study presented at ECR 2017 compared image quality and radiation dose when going from second-generation DSCT (Somatom Flash, Siemens Healthineers) with a third-generation system (Somatom Force, Siemens). The group from Mie University Hospital in Tsu examined patients with known or suspected coronary artery disease undergoing stress CT perfusion on the second-generation system and then the third-generation DSCT scanner. Comparing contrast-to-noise ratio and radiation dose between the two, the results showed better enhancement combined with radiation dose reductions of about one-third.
Dynamic perfusion CT of a 55-year-old man after coronary artery bypass grafting. Z-axis coverage of 10.5 cm in the third-generation scanner was sufficient to cover the entire left-ventricular myocardium. Left-ventricular atheroma at myocardium reveals similar perfusion on the anterior and inferior walls, but radiation dose was 30% lower (3.0 mSv) at third-generation DSCT. Images courtesy of Dr. Kakuya Kitagawa, PhD.
Dose length product per phase and of the entire exam was about 30% lower with the third-generation system than the second-generation scanner, said Dr. Masafumi Takafuji in his ECR talk.
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