A PSMA targeted nanobubble includes a membrane that defines at least one internal void, which includes at least one gas, and at least one PSMA ligand coupled or conjugated to the membrane. The membrane includes at least one lipid and at least one nonionic triblock copolymer that is effective to control the size of the nanobubble without compromising in vitro and in vivo echogenicity of the nanobubble.
