This document discusses the appropriateness of imaging modalities for cardiac masses under 3 variants: 1) adult with suspected cardiac mass, initial imaging; 2) adult with known cardiac mass in echocardiography of unknown etiology, next imaging; and 3) adult with known cardiac mass and established etiology, follow-up imaging. US echocardiography transthoracic resting, MRI heart function and morphology without and with contrast, and CT heart function and morphology with contrast are usually appro…