Can Radiation Dose Be Reduced and Image Quality Improved With 80-kV and Dual-Phase Scanning of the Lower Extremities With 64-Slice Computed Tomography Angiography?. Issue 5 (September 2015)

• Record Type: Journal Article
• Authors: Zhou, Yunfeng; Wang, Juan; Dassarath, Meera; Wang, Minhong; Zhang, Qiang; Xiong, Yuwei; Yuan, Quan
• Is Part Of: Journal of computer assisted tomography. Volume 39:Issue 5(2015)
• Publication Date: 2015-09
• Subjects: Tomography -- Periodicals; Tomography -- Periodicals; Tomography; Periodicals; 616.0757
• DOI: 10.1097/RCT.0000000000000258
• Languages: English
• ISSNs: 0363-8715

Abstract

<abstract> <title> <x xml:space="preserve">Abstract</x> </title> <sec> <title>Objective</title> <p>To prospectively compare the new computed tomographic angiography (CTA) protocol (NCP) using 80-kV and dual-phase scanning with the routine CTA protocol (RCP) using 120-kV and single-phase scanning in patients with peripheral arterial disease.</p> </sec> <sec> <title>Methods</title> <p>A total of 60 patients were randomized to undergo the NCP (30 patients) or RCP (30 patients) scan. We compared the arterial attenuation values, overriding of the contrast bolus, signal-to-noise ratio, and radiation dose between 2 groups.</p> </sec> <sec> <title>Results</title> <p>The occurrence rate of contrast bolus overriding was not statistically significant (<italic>P</italic> = 0.69). The average arterial attenuation value in the NCP group was significantly higher (<italic>P</italic> &lt; 0.05) than that in the RCP group. The radiation dose in the RCP group was significantly higher (<italic>P</italic> &lt; 0.001) than that in the NCP group. The mean signal-to-noise ratio in the NCP group was significantly lower (<italic>P</italic> &lt; 0.001).</p> </sec> <sec> <title>Conclusions</title> <p>Sixty-four-slice CTA with the NCP can significantly reduce the radiation dose and improve the arterial enhancement and calf arteries imaging.</p> </sec> </abstract>