The invention discloses a fluorocarbon emulsion auxiliary agent for increasing targeted area tissue energy deposition in HIFU treatment, which includes non-continuous phase constituted by filming material coating and continuous phase constituted by water-based medium, the non-continuous phase is dispersed in the continuous phase homogeneously, grain size of the non-continuous phase is 0.1-2um, the content of the film-forming material in the auxiliary agent is 0.1-100g/L, the core material is a liquid for generating liquid / gaseous phase change at 38-100 deg C, the content in the auxiliary agent is -200mg/L. The invention also discloses the use of the fluorocarbon emulsion auxiliary agent in HIFU treatment. |