Table 1

Acquisition Protocols for the CT Evaluation of Subclinical Leaflet Thrombosis

Guidelines for the Optimization of Scan Technical Quality
  • 1. At least 50 ml of contrast, ideally 100 ml

  • 2. Full retrospective gating

  • 3. Submillimeter scan slice thickness

  • 4. No dose modulation

  • 5. Heart rate below 70 beats/min, with beta blockade where feasible

  • 6. 120-kV scanner voltage, increased to 140 kV in the presence of

    • 1) Denser stent frames (e.g., Lotus);

    • 2) coexisting permanent pacemaker;

    • 3) coexisting mechanical bioprosthetic valves;

    • 4) large body habitus