A molecular imaging agent including a detectable moiety, a chelation moiety, and a carrier moiety is provided. In one embodiment, the detectable moiety is coupled to the chelation moiety and the chelation moiety is linked to the carrier moiety. In another embodiment, the detectable moiety is 99mTc; the chelation moiety includes HYNIC; and the carrier moiety includes from N-terminus to C-terminus: a His6 purification tag, a human VEGFA polybasic tag sequence, and a human Fc stabilization segment.