On the Way to Routine Cardiac MRI at 7 Tesla: A Pilot Study of 84 Examinations

This pilot study assessed the feasibility and image quality of cardiac MRI performed at 7 Tesla (ultra-high field) using commercially available hardware in 84 consecutive examinations.

Ventricular function analysis at 7T produced diagnostic-quality imaging, with good quantification of left and right ventricular volumes and acceptable flow measurements. High-field MRI offers the potential advantage of superior signal-to-noise ratio and higher spatial resolution, which could enable detection of myocardial fibrosis and plaque microstructure at sub-millimeter scales impossible with clinical 1.5T or 3T systems.

The practical challenges of 7T cardiac MRI remain substantial: radiofrequency field inhomogeneity at ultra-high fields creates spatial artifacts in cardiac images, specific absorption rate (SAR) limits constrain pulse sequences, and the costs of 7T systems make routine clinical deployment economically unfeasible in the near term. The 84-examination pilot demonstrates that these challenges can be navigated — but does not yet demonstrate that 7T provides clinically actionable information beyond current 3T capabilities.

For research purposes, 7T cardiac MRI holds promise for studying myocardial microstructure and plaque biology. For clinical practice, it remains a research tool.

We rate the evidence limited. A small pilot study demonstrating technical feasibility of routine 7T cardiac MRI — research-grade infrastructure data with no current clinical application pathway.