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Figure 1 Schematic representation of the stent, ribbon, and ribbon+margin segment analysis. A (arrows) represented the axial length of the stent analysis after the procedure; B (arrows) represented the ribbon analysis; C (arrows) represented the ribbon+margin analysis including approximately 5 mm of margins beyond the ribbon (includes any injury). The three analyses at follow-up enabled definition of (a) restenosis at the margin of the stent within the radiated segment [(ribbon restenosis) – (stent restenosis)], (b) restenosis at the margin of the radiation ribbon [(ribbon + margin restenosis) – (ribbon restenosis)], and (c) restenosis beyond the stent margin [(ribbon + margin restenosis) – (stent restenosis)]. Five-millimeter segments of proximal and distal reference diameters are averaged to estimate the reference vessel diameter.