A mechanical manipulator (10) for controlling the movement of high intensity focused ultrasound (HIFU) transducers, especially for medical use, such as in the treatment of cancers. A base harness having two or three legs (12) is mounted on the treatment table. A central shaft mounted on the base harness carries a diagnostic probe as well as a plurality of treatment probes. The treatment probes may be moved through three degrees of freedom using computer controlled motors. The treatment probes may be moved linearly, in jaw motion and in a pitch motion.
