Masao Kiguchi RT, Presenter: Nothing to Disclose

Jun Horiguchi MD, Abstract Co-Author: Nothing to Disclose

Chikako Fujioka RT, Abstract Co-Author: Nothing to Disclose

Yun Shen PhD, Abstract Co-Author: Employee, General Electric Company

Noriaki Matsuura, Abstract Co-Author: Nothing to Disclose

Katsuhide Ito MD, Abstract Co-Author: Nothing to Disclose

Minoru Ishifuro, Abstract Co-Author: Nothing to Disclose

et al, Abstract Co-Author: Nothing to Disclose

The purpose of this exhibit is: 1. To attain low dose 64-slice coronary CTA technique achieved by prospective ECG-triggering. 2. To understand the advantage of axial scan in plaque and stent imaging. 3. To understand the reduction of cone beam artifacts by 3D Back Projection (BP) algorithm.

Methodology: A 64-row x 0.625mm-collimation configuration with prospective ECG-triggered scan. Three or 4 x-ray exposures covering 11cm or 14.5cm. Radiation dose: Around 3 mSv - without 'dynamic padding'. Plaque and stent imaging: improved visibility, no helical artifacts. Three-dimensional Back Projection (BP) algorithm: theory and images.  

The major teaching points of this exhibit are: 1. 'SnapShot Pulse' prospective ECG-triggered 64-slice coronary CTA reduces radiation dose to around 3 mSv. 2. 2. Improved spatial resolution is advantageous for plaque and stent imaging. 3. Conebeam artifacts seen on multi-slice spiral CT technology are reduced by 3DBP algorithm.

Kiguchi, M, Horiguchi, J, Fujioka, C, Shen, Y, Matsuura, N, Ito, K, Ishifuro, M, et al, , 'SnapShot Pulse' Prospective Electrocardiograph (ECG)-triggered Coronary 64-slice CT Angiography (CTA): Advantage in Dose and Spatial Resolution.  Radiological Society of North America 2008 Scientific Assembly and Annual Meeting, February 18 - February 20, 2008 ,Chicago IL. http://archive.rsna.org/2008/6007911.html