Abstract: The present invention discloses an enhancement agent for high intensity focused ultrasound (HIFU) treatment, which is administered to a patient before HIFU treatment and can reduce the level of EEF at the target location to be treated with HIFU. EEF is presented by the expression: EEF=?Pt/V (unit: J/mm3), and refers to the HIFU energy needed to effectively treat a tumor per unit volume of the tumor, wherein, ?=0.7; P refers to the total acoustic power of HIFU source (unit: W); t refers to the total time of HIFU treatment (unit: s); V refers to the volume of HIFU-induced lesions (unit: mm3). If the amount of EEF at the target location before administration of the enhancement agent is defined as EEF(base) and the amount of EEF at the target location after administration of the enhancement agent is defined as EEF(measurement), the ratio between EEF(base) and EEF(measurement) is more than 1, preferably more than 2, and more preferably over 4.

Abstract: The present invention discloses a plasmid enhancement agent for high intensity focused ultrasound (HIFU) treatment, which can increase acoustic energy deposition at the target location during HIFU treatment. The enhancement agent comprises a nanometer-sized biocompatible solid. The present invention also discloses another plasmid enhancement agent for HIFU treatment, wherein, the enhancement agent comprises a discontinuous phase is comprised of a core material encapsulated by a membrane-forming material, and a continuous phase comprised of aqueous medium; the discontinuous phase is uniformly dispersed in the continuous phase and has a particle size ranging from 10-1000 nm; the amount of the membrane-forming material in the enhancement agent is 0.1-100g/L; and the core material comprises nanometer-sized biocompatible solid selected from the group consisting of magnetic biomaterials, hydroxylapatite, and calcium carbonate, and the amount of the core material in the enhancement agent is 0.1-150 g/L.

Abstract: The present invention discloses a fluorocarbon emulsion enhancement agent for HIFU treatment, which can increase acoustic energy deposition at the target location during HIFU treatment. The enhancement agent comprises a discontinuous phase comprising of a core material encapsulated by a membrane-forming material and a continuous phase comprised of aqueous medium; the discontinuous phase is uniformly dispersed in the continuous phase and the particle size of the discontinuous phase ranges from 0.1-2 ?m; the amount of the membrane-forming material in the enhancement agent is 0.1-100 g/L; the core material is comprised of a liquid that undergoes a liquid-gas phase transition at 38-100° C., and the amount of the core material in the enhancement agent is 5-200 ml/L. The fluorocarbon emulsion enhancement agent for HIFU treatment of the present invention can significantly change the acoustic environment of the target location and can increase acoustic energy deposition at the target location during HIFU treatment.

Abstract: The present invention discloses a particle enhancement agent for high intensity focused ultrasound (HIFU) treatment, which can increase acoustic energy deposition at the target location during HIFU treatment. The enhancement agent comprises a discontinuous phase comprised of a core material encapsulated by a membrane-forming material and a continuous phase comprising of aqueous medium. The discontinuous phase is uniformly dispersed in the continuous phase and the particle size of the discontinuous phase ranges from 0.1-8 ?m; the amount of the membrane-forming material in the enhancement agent is 0.1-100 g/L; the core material is comprised of a liquid that does not undergo a liquid-gas phase transition at 38-100° C., and the amount of core material in the enhancement agent is 5-200 g/L.