PET Imaging With [18F]Fluselenamyl in People With Cardiac Amyloidosis

This observational study will evaluate the imaging performance of the investigational positron emission tomography (PET) radiotracer\[18F\]Fluselenamyl (FSA) in individuals with cardiac amyloidosis. The study aims to determine whether \[18F\]Fluselenamyl PET imaging can detect and characterize amyloid deposits in the heart. Participants will undergo PET imaging following administration of \[18F\]Fluselenamyl, along with clinical assessments and other study procedures as needed. Imaging results will be used to assess tracer uptake in the heart and to evaluate the potential of \[18F\]Fluselenamyl as a noninvasive tool for detecting cardiac amyloidosis. The study will also collect safety information, including clinical assessments, laboratory testing, and monitoring for adverse events. This research may help establish \[18F\]Fluselenamyl as a novel imaging biomarker for cardiac amyloidosis.