Reasons for FFRCT data rejection and factors that impact analysis
| Reason for data rejection | |
| Image quality | Motion artefacts Blooming Clipped structures Image noise |
| Inappropriate submission | Vessels with stent or patient with coronary artery bypass graft Cardiac hardware present |
| Factors associated with favourable impact on FFR CT analysis | |
| Patient preparation | Pre-treatment with glyceryl trinitrate for coronary vasodilatation Administration of beta blockers to optimise heart rate control to reduce motion artefact |
| Image acquisition | Aorta contrast opacification (timing of contrast administration) High temporal resolution (use of dual source CT scanners) |
| Image reconstruction | Smaller field of view Small section thickness |