fig4
From: Contemporary approach to heavily calcified lesions: tools of the trade, challenges, and pitfalls
![Contemporary approach to heavily calcified lesions: tools of the trade, challenges, and pitfalls](https://image.oaes.cc/2d228e15-3957-4138-8410-b2b7d3774536/vp8075.fig.4.jpg)
Figure 4. Calcification detected by optical coherence tomography (OCT) as signal-poor area with well-delineated external contours (A). Nodular calcification detected by OCT (B). OCT reveals calcium fracture (red arrow) after the use of intravascular lithotripsy (C).