[18F]FT8 PET Imaging in Immunoglobulin Light Chain Amyloidosis

This study is testing a new PET scan imaging agent called [18F]FT8 to see if it can better detect amyloidosis in the heart — a condition where abnormal proteins build up in heart tissue and affect its function. The goal is to improve diagnosis using advanced imaging. **You may be eligible if...** - You are 18 years or older - You are suspected of having, newly diagnosed with, or previously diagnosed with cardiac amyloidosis - Supporting evidence includes cardiac MRI, CT scan, or blood biomarkers suggesting amyloidosis - You are either a patient at the Hematology Department of Tianjin Medical University General Hospital, or a healthy volunteer **You may NOT be eligible if...** - You have severe kidney disease or allergies to contrast agents - You are unable to undergo PET/CT imaging - You are pregnant or breastfeeding - You have a pacemaker or other implant that interferes with imaging - You are not able to provide informed consent Talk to your doctor to see if this trial is right for you.