作者
Felix G Meinel, Christian Canstein, U Joseph Schoepf, Martin Sedlmaier, Bernhard Schmidt, Brett S Harris, Thomas G Flohr, Carlo N De Cecco
发表日期
2014/7
期刊
European radiology
卷号
24
页码范围
1643-1650
出版商
Springer Berlin Heidelberg
简介
Objectives
To assess the influence of tube potential on radiation dose and image quality of third-generation dual-source coronary CT angiography (CTA) in a phantom simulating an obese patient.
Methods
A thoracic phantom was equipped with tubular inserts containing iodine solution and water. A soft-tissue-equivalent ring around the phantom simulated an obese patient. Images were acquired at tube potentials of 80, 100, 120 and 140 kV with second-generation dual-source CT (DSCT) and 70–150 kV (in 10-kV increments) with third-generation DSCT. Contrast-to-noise ratio (CNR) was calculated and CT dose index was recorded.
Results
With second-generation DSCT, CNR was highest for 120 kV (19.0) and decreased with lower tube potential (12.0 at 80 kV) owing to disproportionately increased image noise. With …
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FG Meinel, C Canstein, UJ Schoepf, M Sedlmaier… - European radiology, 2014