Which feature distinguishes MRI from CT in cardiac imaging?

• A. No radiation exposure
• B. Better temporal resolution
• C. Tissue fibrosis and remodeling
• D. Faster scanning

Answer: (C)

MRI’s standout ability in cardiac imaging is tissue characterization. It can directly identify and quantify fibrotic tissue and remodeling of the myocardium using specialized contrast and mapping techniques. Late gadolinium enhancement highlights scar and fibrotic areas, while T1/T2 mapping provides quantitative measures of fibrosis and edema. This lets clinicians assess myocardial viability and structural changes after injury, which CT cannot match with the same precision. CT excels at anatomy and coronary visualization, but its tissue characterization—especially differentiation of fibrosis from normal myocardium—is limited compared to MRI. That is why tissue fibrosis and remodeling is the feature that most clearly distinguishes MRI from CT in cardiac imaging.