This study is intended as a pilot study to identify angioplasty related redistribution or shift of lipid core plaque (LCP) lesions that are located at sites of artery bifurcation. We hypothesize that during angioplasty and stenting, soft plaque that contains lipid cores may be prone to shift more than (hard) fibrotic or calcified lesions. This pilot study may help to better characterize lesions likely to shift and to provide imaging-based information like NIRS that will improve the interventional treatment of bifurcation lesions.