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Figure 2 Two-dimensional reconstruction of three stents in curved multiplanar reformatted (MPR) format in long axis (below) and short axis perpendicular to the center line (above). (A) Stent fully patent, with homogeneous contrast enhancement throughout the long- and short-axis images (quantitative coronary angiography [QCA] 0%, multidectector computed tomography [MDCT] grade 1). (B) Partially restenosed stent showing lack of contrast enhancement in lower left portion of long-axis image and in crescent shaped portion of short-axis image taken from lower part of the stent (QCA 39%, MDCT grade 2). (C) An obstructed stent, showing lack of contrast enhancement throughout long- and short-axis images (QCA 100%, MDCT grade 4).