What is New in Cardiac CT? In Search of the Comprehensive and Conclusive Heart Scan

Coronary CT Angiography (CT) with its noninvasive cross sectional information has seen remarkable growth in recent years. With the introduction of the new generation scanners, like the 320-slice CT, it has risen to a whole new level. Percent diameter stenosis determined with the use of 320-slice CT shows good correlation with Invasive catheter angiogram (ICA) without significant underestimation or overestimation. Plaque composition on CT regardless of lesion severity has emerged as a strong predictor of major cardiac events. The percentage stenosis mismatch between CT and ICA can be explained by the 2 dimensional nature of ICA and its interpretive inconsistencies. In the upcoming years, we need to evolve from focusing on lumen stenosis to a comprehensive assessment of CAD and its impact on patient outcome.