Obstructive lesions in the coronary arteries which contain large amounts of calcium remain a major challenge for interventional cardiologists undertaking percutaneous coronary intervention (PCI). Despite incremental improvements in device technology, the presence of extensive especially concentric, coronary calcification is still associated with an increased risk of complications including the procedural risks of coronary perforation and dissection and the post procedural risks associated with stent underexpansion, including stent thrombosis and in-stent restenosis [ ].