Oral Abstract Session 04: Early Career Awards 3: Basic Science (2018)-Four-minute whole-heart coronary MRA with sub-millimeter isotropic resolution and 100% respiratory scan efficiency

Four-minute whole-heart coronary MRA with sub-millimeter isotropic resolution and 100% respiratory scan efficiency

Video Transcription

Video Summary

The speaker addressed challenges in coronary MR angiography, including cardiac and respiratory motion, long scan times, and the need for high isotropic resolution. They presented a free-breathing 3D CMRA method combining 2D image-based navigator, variable-density Cartesian sampling, and a low-rank 3D PROS reconstruction. Phantom and volunteer studies showed that 3D PROS preserved resolution, improved sharpness, and outperformed compressed sensing, with acquisitions reduced to about 4–5 minutes. The approach enabled high-quality sub-millimeter coronary imaging with predictable scan time and full scan efficiency, with future work aimed at arrhythmia rejection and even higher resolution.

Keywords

coronary MR angiography

free-breathing 3D CMRA

low-rank 3D PROS reconstruction

variable-density Cartesian sampling

sub-millimeter coronary imaging