Pathologic extracardiac uptake of Tc-99m tetrofosmin identified in the chest during myocardial perfusion imaging

Viewing projection images should be an integral part of interpreting MPI studies. This practice enables the reader to diagnose important extracardiac pathologies. Although physiologic and benign conditions may merely be an academic exercise, malignant conditions that require immediate intervention may be incidentally found. Even though MPI is performed for cardiac evaluation, cardiologists or nuclear radiologists interpreting the study should be watchful for noncardiac uptake of the radiotracer.