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Figure 2 Acute angiographic and intravascular ultrasound (IVUS) results obtained after cutting balloon angioplasty (CBA) for in-stent restenosis (ISR) in left circumflex artery. (a) Preintervention IVUS image shows complete neointimal filling of the lumen in the stent (lumen cross-sectional area 1.3 mm²; (b) Final result following CBA with 2.5-mm balloon (lumen cross-sectional area 6.0 mm²).