Fig. 6.

76-year-old male patient with severe aortic stenosis planned for transcatheter aortic valve replacement. Pre-procedural sequential mode CCTA showed a mixed plaque in the proximal LAD with a severe stair-step artifact in standard mode reconstructions (a), eliminated with the ZeeFree algorithm (b). Semiautomatic quantitative plaque analysis in standard and ZeeFree reconstructions is shown (c,d) in curved and short-axis reformations (inserts in c,d). As can be appreciated, both volume and plaque composition changes in the images without artifacts (standard total plaque volume=163.33 mm³; ZeeFree total plaque volume=101.33 mm³).