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Figure 2 A 58-year-old male patient with two-vessel disease. Note the excellent image quality as well as the absence of calcifications at the site of obstruction. (a) High-grade ostial lesion (multislice spiral computed tomography [MSCT]). (b) Tandem lesion in proximal right coronary artery (MSCT). (c) Catheter correlation of the ostial lesion. (d) Tandem lesion in catheter correlation.