Fig. 2From: Comparison of optical coherence tomography-guided and intravascular ultrasound-guided rotational atherectomy for calcified coronary lesionsRepresentative another case of optical coherence tomography (OCT) guided rotational atherectomy (RA) images. A Pre-PCI OCT images showed heavily calcified plaque with a 360° calcium arc and a minimal calcium thickness of 0.82 mm. B After RA with a 1.75-mm burr, the minimal calcium thickness measured 0.63mm without crack formation. Subsequently, the operator performed a scoring balloon for dilation rather than upsize the burr. C After dilation with a 3.0 mm × 13 mm scoring balloon, OCT images showed disruption and cracks formation. D After stent implantation with post-dilatation OCT images showed adequate stent expansion (91%)Back to article page