Described herein are nanoemulsions comprising (1) at least one fluoro ether and (2) a block copolymer comprising a hydrophilic block and hydrophobic block, wherein the nanoemulsion comprises a therapeutic agent in the nanoemulsion. The nanoemulsions are stable and are excellent drug delivery devices for ultrasound-mediated, image guided drug delivery. Also described herein are methods for using the nanoemulsions to treat tumors and cancers as well as using them as imaging agents.
