| 摘要 |
PURPOSE:To realize an effective remedy for cancer with little side effect by forming a sound field where converging ultrasonic waves are continuously radiated for a proper length of time or plural kinds of converging fields are switched and radiated in a short time to perform generation or collapse of cavitation effectively as well as selectively. CONSTITUTION:Information on ultrasonic wave irradiation remedy strategy is inputted by means of key input means 19 to the main control circuit 20 of a radiation portion and in a accordance with the information a radiation focus/code signal for defining the focus area position and the sound pressure distributing form of an irradiation sound field is delivered from the main control circuit 20 of the irradiation portion to a drive phase generating circuit 21, and the drive phase of each of irradiation transducer elements is delivered to an drive signal generating circuit 6-1-6-N. The drive signal generated is provided to an element driving circuit 2-1-2-N to drive each irradiation transducer element 1-1-1-N. The width of drive is controlled also by signals directly delivered from the main control circuit 20 of the irradiation portion, and operation is performed simply as well as certainly for varying intensity without varying the focus of irradiation, or, should abnormality occur, for urgently stopping irradiation of ultrasonicwaves. |
