Andrew David Scott1,2, Jennifer Keegan1,2, David Firmin1,2
1Cardiovascular Magnetic Resonance Unit, Imperial College London, London, United Kingdom; 2Cardiovascular Magnetic Resonance Unit, the Royal Brompton & Harefield NHS Foundation Trust, London, United Kingdom
Coronary wall measurements must be reproducible for longitudinal studies. Navigator-gated 2D TSE and spiral techniques are commonly used, although respiratory efficiency is low and variable. Beat-to-beat respiratory motion correction (B2B-RMC) can correct for tidal respiratory motion with ~100% respiratory efficiency, allowing 3D vessel coverage in a reasonable duration. We compared vessel wall thicknesses using B2B-RMC 3D spiral with navigator-gated 2D TSE and 2D spiral imaging and assessed intra-observer, inter-observer and inter-study reproducibility. Reproducibility was excellent with B2B-RMC and good with navigator-gated techniques. B2B-RMC enables reproducible 3D coronary wall assessment within reasonable durations which will permit improved assessment of atherosclerotic disease.