A workstation is programmed to operate as an application development system for a medical imaging system. The mixing element includes a base plate having an upper surface and a lower surface. The rotor has auxiliary salient poles that are each protruded from a side surface of each main salient pole in the circumferential direction. The sound source is positioned to provide ultrasound to the treatment region so that the treatment region is subject to coincidental treatment by irradiation and ultrasound. The controller is usually battery operated.