The primary objectives of this study are:
1. To compare with contrast angiography, the ability of DSCT to detect and quantify coronary artery stenoses.
2. To compare with gray-scale IVUS, the ability of DSCT to quantify plaque cross-sectional diameter \& area measurements \& plaque volume.
3. To evaluate the ability of DSCT to assess plaque morphology and quantify plaque components as compared to gray-scale and IB-IVUS.
4. To evaluate the ability of DSCT to identify \& measure lesion remodeling compared to gray-scale IVUS.
5. To determine if pre-PCI evaluation of coronary plaque morphology by IB-IVUS can a) predict procedural success as assessed by adequate stent strut apposition and expansion and b) peri-procedural myocardial necrosis as measured by biomarker elevation.
