Weiguo Zhang MD, Presenter: Nothing to Disclose

Guang Zhi Wang, Abstract Co-Author: Nothing to Disclose

Mengsu Zeng MD, PhD, Abstract Co-Author: Nothing to Disclose

To investigate the feasibility of using a single-dose injection protocol in CT angiography (CTA) of the extra-cranial carotid artery and coronary artery (CA) with 320-row multi-detector CT.

A total of 82 consecutive patients with suspected carotid artery disease underwent an original comprehensive CTA protocol aiming at capturing the extra-cranial carotid arteries and coronary arteries simultaneously using 320-row MDCT. The image quality, attenuation, and CNRs of the carotid, and coronary arteries were assessed. The delayed time of two acquisitions (extra-cranial carotid artery and CA) was also compared between patients with and without cardiac venous opacification. The contrast medium volume and radiation dose were recorded.

All of the scanning was performed successfully. The image quality was diagnostic in the carotid(100 %) and CA (93.2 %). The mean attenuation of carotid and coronary artery was 416.3±72.5 Hu, 435.3±69.3 Hu and 477.8±83.4Hu,489.7±73.4Hu. The mean CNR of carotid and coronary artery was 14.3±4.1 and 17.1±3.5. The delayed time in patients with coronary venous opacification was significantly longer than that of patients without coronary venous opacification(5.3±1.7s vs. 3.1±1.5s), The mean radiation dose was 7.7±5.2 mSv (range 3.1 -16.8 mSv), The mean volume of contrast media was 78.6±10.3ml.

carotid and coronary artery can be imaged successfully with our original tailored single-dose injection CTA protocol using 320-row CT with acceptable image quality and relatively lower radiation exposure.

The coexistent nature of atherosclerosis in carotid and coronary artery can be evaluated via our original CTA protocol

Zhang, W, Wang, G, Zeng, M, Computed Tomography Angiography of Carotid and Coronary Artery via a Single-bolus Injection Protocol, a Feasibility Study Using 320-row Multi-detector CT.  Radiological Society of North America 2013 Scientific Assembly and Annual Meeting, December 1 - December 6, 2013 ,Chicago IL. http://archive.rsna.org/2013/13044442.html