A method of preparing a HIFU system having a transrectal probe to provide treatment to the prostrate area of a patient. The transrectal probe includes a fluid pathway which includes an area adjacent a face of a therapy transducer. The method comprises the steps ofproviding a fluid circulation system in fluid communication with the fluid pathway of the transrectal probe. The fluid circulation system includes a pump configured to circulate a fluid through the fluid circulation system and the fluid pathway of the transrectal probe and a degasser. The degasser is configured to remove dissolved gases from the fluid passing through the degasser. The degasser further includes a vacuum pump. The method further comprises the step of electrically coupling the vacuum pump and the pump together such that each receives electrical power at generally the same time.
