Group 1 - the results of MSCT are analysed by the interventional cardiologist that is to perform angiography and PCI. Based on this analysis preliminary procedural strategy is planned (stent diameters, decision on direct stenting vs. predilatation, decision on postdilation) Group 2 - interventional cardiologist is blinded to the images obtained by MSCT. The PCI procedure is performed solely on the basis of invasive coronary angiography In both study groups IVUS will be performed before and after stent implantation. The operator will be blinded to the results of pre-PCI IVUS. The second IVUS will be performed when angiographic results are optimal in the opinion of the operator. The results of the second IVUS examination will be the efficacy measure of the two compared treatment strategies.