“…[36][37][38][39][40][41] Emulsions and nano-systems encapsulating liquid perfluorocarbons (PFCs) as contrast agents for MRI have proven their potentialities for the imaging of blood pool, ventricular abnormalities, liver, thrombi, atherosclerosis, mononuclear phagocyte system, tumor, molecular imaging of angiogenesis and drug delivery carriers of anticancer drugs. However, the use of PFC emulsions is limited due to their heterogeneity, instability, split 19 F signals, as well as excessive retention within internal organs (liver, spleen, lung) for a prolonged period of time.…”