Myocardial extracellular volume (ECV) is an established imaging biomarker for assessing myocardial fibrosis and interstitial disease, playing a crucial role in the diagnosis and risk stratification of conditions such as cardiomyopathies including amyloidosis, and ischemic heart disease [1,2]. Cardiac magnetic resonance imaging (MRI) has long been considered the reference standard for ECV quantification due to its ability to provide high-resolution tissue characterization through T1 mapping befor…