| 摘要 |
<p>This invention is directed to accomplish an ultrasonic remedial apparatus for generating a living body action such as cavitation suitable for remedy of a malignant tumor, a thrombus and a calculus, an ultrasonic wave diagnostic apparatus for generating cavitation to enhance an ultrasonic echo image of a blood stream, etc., and utilizing its reflection capacity, an ultrasonic chemical reaction promotion apparatus, an ultrasonic washing apparatus, an ultrasonic sterilizer, etc., by providing an ultrasonic irradiation apparatus for efficiently generating acoustic cavitation. Irradiation focus code signals for defining focal positions and sound pressure distribution shapes of irradiation sound fields of a fundamental frequency waves and harmonics are applied from a main control circuit to driving phase generation circuits, respectively. The driving phases thus generated are applied to driving signal generation circuits and the resulting driving signals are applied to device driving circuits, respectively, so that a group of the fundamental frequency devices and a group of harmonic devices are driven, respectively. The driving phases are controlled so that the fundamental frequency wave and the harmonic waves are superposed with one another in a medium near the focus, and acoustic cavitation is generated locally and efficiently.</p> |
