Patent ID: 6540700
Filing Date: 2003-04-01
Classification: A61B

Abstract:
An ultrasound treatment apparatus comprising:an ultrasound source for generating treatment ultrasound which is focused; a driving circuit for driving said ultrasound source to generate treatment ultrasound from said ultrasound source; and a controller for determining a focus intensity (W/cm2) of the treatment ultrasound and an irradiation period (sec) of the treatment ultrasound under a condition in which a frequency (MHz) of the treatment ultrasound is a predetermined value, so that an index obtained by a product of the focus intensity, the irradiation period and the frequency falls within an appropriate range from 6,000 (inclusive) to 40,000 (inclusive), and for controlling said driving circuit based on the determined focus intensity and irradiation period, a lower limit of the range being set to cause thermal degeneration in a tissue of a tumor, and an upper limit of the range being set to avoid cell destruction of the tissue of the tumor.