Ultrasound treatment apparatus

• US 6,540,700 B1
• Filed: 10/25/1999
• Issued: 04/01/2003
• Est. Priority Date: 10/26/1998
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Aida, Satoshi, Fujimoto, Katsuhiko, Kosaku, Hideki, Hazama, Yoichi, Takada, Yoichi
• Primary Examiner(s): Smith, Ruth S.
• Application Number:
  US09/425,986
• Time in Patent Office: 1,254 Days
• Field of Search: 600/439, 601/2-4
• US Class Current: 601/3
• CPC Class Codes: A61B 17/2258 integrated in a central portion of the shock wave apparatus
• CPC Class Codes: A61B 8/085 for locating body or organic structures, e.g. tumours, calculi, blood vessels, nodules

Abstract

An ultrasound treatment apparatus includes an ultrasound source for generating treatment ultrasound which is focused, a driving circuit for driving the ultrasound source to generate treatment ultrasound from the ultrasound source, and a controller for controlling to make the driving circuit drive the ultrasound source under an irradiation condition in which an optimization index obtained by the product of the focus intensity (W/cm²), the irradiation period (sec), and the frequency (MHZ) all of the treatment ultrasound falls within an appropriate range from 6,000 (inclusive) to 40,000 (inclusive).

Claims

1. 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.

2. An apparatus according to claim 1, wherein said controller controls said driving circuit to cause said driving circuit to drive said ultrasound source under an irradiation condition in which the focus intensity becomes not more than 2,000 (W/cm²).

3. An apparatus according to claim 1, further comprising a console for inputting at least one of the focus intensity and the irradiation period, said controller determining the other of the focus intensity and the irradiation period on the basis of the input one of the focus intensity and the irradiation period and a frequency of the treatment ultrasound such that the index falls within the appropriate range.

4. An apparatus according to claim 1, further comprising a console for inputting both the focus intensity and the irradiation period, and means for generating a warning when the index obtained from the input focus intensity, the input irradiation time, and a frequency of the treatment ultrasound falls outside the appropriate range.

5. An apparatus according to claim 1, further comprising a memory storing an appropriate range of the index for each internal organ.

6. An apparatus according to claim 1, further comprising display means for graphically displaying the range.

7. 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 from a product of the focus intensity, the irradiation period and the frequency falls within a predetermined range, 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.

8. An apparatus according to claim 7, comprising:

said controller determining said condition to be in said range having said upper limit defined as a maximum focus intensity not causing cell destruction and said lower limit defined as a minimum focus intensity causing cell degeneration.

9. An apparatus according to claim 8, comprising:

said controller determining said upper and lower limits based upon an internal organ being irradiated.

10. 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 controlling said driving circuit such that an index obtained by a product of a focus intensity (W/cm²) of the treatment ultrasound, an irradiation period (sec) of the treatment ultrasound and a frequency (MHz) of the treatment ultrasound falls within a predetermined range, a lower limit of the range being set to cause thermal degeneration in a tissue of a tumor, an upper limit of the range being set to avoid cell destruction of the tissue of the tumor, two of the focus intensity, the irradiation period and the frequency being determined as predetermined requirements, and the other being determined by the controller.