Fig. 2

Angiography and intravascular ultrasound (IVUS) imaging. A, B Outer cylinder of 20G long needle (introducer needle, Medikit, Tokyo, Japan), the tip facing the center of the calcified plaque was checked by 2 perpendicular views in fluoroscopy. C Crosser. C-I) IVUS images showing the route created through the calcified plaque. D A kissing balloon inflation was performed with a 10 × 40 mm scoring balloon (NSE PTA; Nipro, Osaka, Japan) for SFA and with a 6 × 40 mm semi-compliant balloon (Sterling; Boston Scientific, Natick, MA) for DFA. E) final angiography. E-II) IVUS showing the lumen area gained