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Fig. 2C. —62-year-old woman treated with 1-cm Palmaz stent (Cordis, Johnson & Johnson, Miami, FL) for ostial atherosclerotic renal artery stenosis 29 months after intervention. Paracoronal volume-rendered CT scans with low-to-high (C) and high-to-low (D) opacity transfer functions show restenosis of 60% (arrow) at distal cranial section of stent. Image quality was considered good on both images; however, lumen delineation was considered better on D. Slight increase in thickness of stent wall did not considerably interfere with detection and quantification of restenosis.