PJ-506 The Impact of Residual Atheromatous Plaque near the Proximal Margin after Sirolimus-Eluting Stent(SES) Implantation on In-Stent Restenosis (ISR) : Intravascular ultrasound (IVUS) study(Intravascular endoscopy/Intravascular ultrasound-7, The 71st Annual Scientific Meeting of the Japanese Circulation Society)