Description

Participants are invited to participate in a research that seeks to understand the dynamic blood perfusion in human body. The investigators expect to have twenty-five participants in this study at Renji Hospital, Shanghai. About sixteen of the participants will be patients who have been diagnosed with decreased cardiac function, nine participants will be healthy individuals with no known vascular disease. These healthy subjects will allow researchers to compare blood perfusion difference with those of persons with decreased cardiac function. All the participants will undergo the same procedure.

If participants agree to participate in this study, researchers will first interview participants and review the past medical record in order to document the medical history. When the screening procedures confirm that participants are eligible to participate in the study, participants will receive one dose of the non-therapeutic administration of a radioactive tracer called N-13 ammonia(13NH3) , then undergo one total body 13NH3 PET/CT Scan (uEXPLORER) to determine the blood flow value of the brain, kidney and other organs. The total body 13NH3 PET/CT Scan will allow investigators to observe and analyze the real-time blood flow differences between patients with between healthy controls and decreased cardiac function.