Yunjing Xue MD, Presenter: Nothing to Disclose

Qing Duan MD, Abstract Co-Author: Nothing to Disclose

Lihong Chen, Abstract Co-Author: Nothing to Disclose

Bin Sun, Abstract Co-Author: Nothing to Disclose

1. To describe the basic principles and feasibility of low-tube-voltage carotid CT angiography and Spectral Imaging using ASiR reconstruction in combination with a lower contrast medium dose with clinical data and images. 2. Illustrate optimization of low dose CT scan and low dose contrast medium injection protocol. 

1. Basic principle and clinical value of low-tube-voltage and GSI monochromatic carotid CT angiography. 2. Optimization of low dose contrast medium injection protocol. 3. Carotid artery image quality evaluation and ASiR optimization. 100-kVp protocol had significantly higher carotid enhancement and sharpness of the artery compared with the 120-kVp protocol. GSI protocol could provide similar image quality of carotid artery to 120-kVp protocol. 4. Both GSI and 100-kVp protocol could significantly reduce the noise of carotid and main branches of thoracic aorta images compared with that of 120-kVp protocol. 5. The GSI (60kev) scan with 50% ASiR and 3 ml/s injection velocity has lowest CM dose and can provide more information of plaque and tissue differentiation. 6. We can balance the image quality, useful information (vessel, plaque, stent，tumor), radiation dose and contrast medium dose all kinds of CT scans parameters to choose the optimized CTA protocol to achieve the best clinical effect.

http://abstract.rsna.org/uploads/2014/14008461/14008461_g85h.pdf

Xue, Y, Duan, Q, Chen, L, Sun, B, Optimal Protocol of Scanning Mode for Reducing Contrast Medium Dose and Radiation Dose in Carotid CT Angiography: Low kVp or Low keV Scan.  Radiological Society of North America 2014 Scientific Assembly and Annual Meeting, - ,Chicago IL. http://archive.rsna.org/2014/14008461.html