Imaging Limitations

Coronary calcium scoring remains a CT-based tool, so MRI is not presented as a replacement for it. The transcript does not provide peer-reviewed outcome data proving mortality, cost, or population-level benefits of whole-body MRI screening. The source does not quantify false positives, downstream biopsies, incidentaloma burden, or anxiety burden from asymptomatic screening. MRI does not assess coronary artery calcification well because it images hydrogen in water and fat rather than calcium. MRI is motion-sensitive, and the described protocol should not be treated as a complete heart-attack-risk assessment.