Keywords:
Cardiac, Cardiovascular system, Vascular, CT, CT-Angiography, Contrast agent-intravenous
Authors:
A. Gennarelli, A. Di Sibio, M. Perri, F. Di Stasio, V. Felli, M. Di Luzio, A. V. Giordano, E. Di Cesare, C. Masciocchi; L'Aquila/IT
DOI:
10.1594/ecr2013/C-0788
Purpose
Coronary artery bypass grafting (CABG) is the standard treatment for advanced coronary artery disease.
It is well known that graft patency is the most important variable that determines the long-term clinical outcome; indeed,
the natural history of CABG involves patency rates of 60% at 10 years for venous grafts and 90% for arterial grafts.
Invasive Coronary Angiography (ICA) remains the gold standard tool for the assessment of CABG patency butmultidetector CT has emerged as an non-invasive important diagnostic tool to evaluate both native coronary vessels and CABGs.
320-slice CT scanner has a maximum of 16 cm volumetric coverage in a single gantry rotation and,
thus,
uses a volumetric CT data acquisition approach reducing radiation burden,
time of breath-hold and contrast load.
Objective of our study is to evaluate image quality and ionizing radiation doses in CABG assessment using 640-slices multidetector CT angiography with prospective gating and step-and-shot protocol.