THERAPEUTIC probe endocavity comprising an imaging transducer integrated within the therapy ultrasound transducer

endo-cavitary probe for therapeutic particularly fabric treatment prostate by emitting focused ultrasound waves, comprising a support (2) forming a guide tube (4) extended by a mounting head (3) for the least one therapy transducer element (7) active surface emitting ultrasonic waves focused and having a front face (9) spherical entire surface in which is provided a window surface, for mounting an imaging transducer (11 ). According to the invention, the therapy transducer element (7) has an end face (9) having a total area equal to the sum of the equal surface area to 1500 mm +/- 200 mm and the surface of the window for passage of the imaging transducer, the ratio of the area of ​​the window on the active surface of the therapy transducer element being less than or equal to 0.45.