JP2001046519A - Output control method for ultrashort-wave curer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an output power control method of an ultrashort-wave curer that can effectively conduct thermotherapy for human seats of disease. SOLUTION: This method performs one of the following control methods: Use of the continuous mode that changes peak output value of the ultrashort- wave output in continuation, use of the peak-power variable pulse mode that changes the peak output value with respect to combination of the predetermined output time (pulse width) and prescribed repetition period of the ultrashort-wave output, stepwise variation of the output time (pulse width) with respect to one of stepwise prescribed repetition periods while fixing the peak output value of ultrashort-wave output as the maximum, and control of the mean power by changing the respetition period of the peak output value or the prescribed output time (pulse width) in the range that output of ultrashort output wave is of small power output while changing the repetition period after the peak power reached the maximum.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control method of an ultra-high frequency wave therapeutic device for performing hyperthermia by irradiating a human body with ultra-high frequency waves, and more particularly to a control method of output power.

[0002]

2. Description of the Related Art Conventionally, in an ultra-high-frequency therapeutic device, a method of changing output power has been mainly used as a method for controlling an effective thermal effect applied to an affected part of a human body. As a method of controlling the output power, a method of changing the peak value of the power, a method of changing the output time (pulse width), a method of changing the output repetition period, and the like can be considered.

[0003]

However, although the output power can be controlled by any of the above-mentioned methods, there is a problem that the heating effect and the degree of danger to the human body are not grasped.

[0004] The present invention has been made in view of such a background, and an object of the present invention is to provide an output power control method of an ultra-high frequency wave therapeutic device capable of effectively performing thermal treatment on an affected part of a human body.

[0005]

According to the first aspect of the present invention, there is provided an ultra-short wave treatment for applying a treatment lead connected via a cord to an affected part of a human body and irradiating an ultra short wave from the lead to perform a thermal treatment. An output control method in a continuous mode for changing a peak output value of a continuously output ultra high frequency wave; a predetermined output time (pulse width) of the output ultra high frequency wave and a predetermined repetition period; An output control method using a peak power variable pulse mode in which a peak output value is changed with respect to a combination; a peak output value of an output microwave is fixed as a maximum value, and any one of predetermined repetition periods set in stages is used. An output control method in which the output time (pulse width) is changed stepwise with respect to the above-mentioned cycle; a peak output value or a predetermined output time when the output ultra-short wave is in a small output power range An output control method for controlling the average power by changing the repetition cycle of (pulse width) and controlling the average power by changing the repetition cycle after the peak power reaches the maximum value. A control method is provided.

According to a second aspect of the present invention, the control of the repetition period and the output time (pulse width) is performed by turning on / off a drive power supply of a high frequency power amplifier circuit by a control pulse train by a CPU. An output control method according to claim 1 is provided.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of an ultrahigh frequency wave therapeutic device according to an embodiment of the present invention. In this figure, reference numeral 1 denotes an ultra-high frequency therapeutic device main body, and an output generated here is supplied to a therapeutic lead 2 to perform thermal treatment.

The ultra-high frequency therapeutic device 1 includes an oscillating circuit 3 for oscillating an ultra-high frequency, an amplifying circuit 4 for amplifying an oscillating signal, a power amplifying circuit 5 for amplifying power for supplying power to the treatment conductor 2,
An impedance matching circuit 6 for matching the impedance of the power supply circuit, a DC power supply 7 for supplying DC power to the power amplifying circuit 5, a control of the entire device, and a control of the DC voltage control circuit 8 for application to the power amplifying circuit 5. It comprises a CPU 9 for providing a signal for controlling ON / OFF of the DC voltage and a voltage value of the DC voltage.

Next, the relationship among the output peak value, output time, and repetition frequency (repetition cycle) will be described with reference to FIG. Wp in the figure represents the peak value of the output,
Control is performed by changing the magnitude of the DC voltage applied to the power amplification circuit 5 by the DC voltage control circuit 8 according to an instruction from the CPU 9. PW is an output time (pulse width), and a DC voltage is supplied to the power amplifier circuit only during this period.
Ultra high frequency is output. Also, 1 / f is a repetition cycle, and is usually represented by a repetition frequency f (Hz) in many cases.
Hereinafter, a method of controlling the output of the microwave therapeutic device according to the embodiment of the present invention will be described.

An output control method in a continuous mode in which the peak output value of a continuously output ultrahigh frequency wave is changed; the magnitude of the DC voltage applied to the power amplification circuit by the DC voltage control circuit 8 at the instruction of the CPU 9 Is a method of controlling

An output control method by a peak power variable pulse mode in which a peak output value is changed with respect to a combination of a predetermined output time (pulse width) and a predetermined repetition period of an output ultrahigh frequency wave; FIG. An example of setting the method will be described. For the output setting (average), the repetition frequency is 400 (Hz), and the output time (pulse width) is 500 μs.
This is a method of performing output control by changing only the peak output Wp.

The peak output value of the output microwave is fixed as the maximum value, and the output time (pulse width) is changed stepwise with respect to any one of predetermined repetition cycles set in steps. FIG. 4 shows a setting example of the output control method. For example, for an output setting (average) of 5 W, the repetition frequency is 25 Hz to 60 Hz.
The output time (pulse width) corresponding to each repetition frequency can be selected from a combination of 2.5 ms to 0.104 ms, which is classified into six steps up to 0 Hz. This is performed to obtain different effects even with the same output at the same duty ratio.

When the output microwave is in the range of small output power, the average power is controlled by changing the peak output value or the repetition period of a predetermined output time (pulse width), and after the peak power reaches the maximum value. Output control method for controlling average power by changing the repetition period; FIG. 5 shows a setting example of this output control method. When the output setting is “fine” and the average output is 6 W, the output time (pulse width) PW is fixed at 500 μs, the peak output Wp is 15 W, and the repetition frequency is 8
00 Hz.

When the output setting is "weak" and the average output is 15 W, the peak output Wp is 30 W and the repetition frequency is 1
A predetermined output is obtained at 000 Hz. When the output setting is “medium” and the average output is 30 W, a predetermined output is obtained with a peak output Wp of 80 W and a repetition frequency of 750 Hz. Furthermore, when the output setting is “strong”, the average output is 40
In the case of W, the peak output Wp is 80 W, which is the maximum value, and this value is used to increase the repetition frequency to 1000 Hz to obtain a predetermined output.

The operation of one embodiment of the present invention has been described above in detail with reference to the drawings. However, the present invention is not limited to this embodiment, and a design change or the like may be made without departing from the gist of the present invention. The present invention is also included in the present invention. For example, the set values of the peak output, the repetition frequency, the output time (pulse width), and the like shown in FIGS. 3 to 5 are examples of the settings, and are not limited to these set values.

[0016]

As described above, according to the present invention, it is possible to control the peak value of the ultrahigh frequency output and to select the duty ratio and the repetition frequency of the output pulse, so that the thermal treatment can be efficiently performed. The effect that can be performed is obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an ultrahigh frequency wave therapeutic device according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a peak output of ultrahigh frequency waves, an output time (pulse width), and a repetition frequency.

FIG. 3 is a chart showing a setting example when a peak output value is changed for a combination of a predetermined output time (pulse width) and a predetermined repetition period.

FIG. 4 shows a setting in which a peak output value is fixed as a maximum value and an output time (pulse width) is changed stepwise with respect to any one of predetermined repetition cycles set stepwise. A chart showing an example.

FIG. 5: In a range of a small output power, the average power is controlled by changing a peak output value or a repetition cycle of a predetermined output time (pulse width). After the peak power reaches the maximum value, the repetition cycle is changed. The figure which shows the example of a setting at the time of changing and controlling average power.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Ultra-high-frequency wave treatment device 2 ... Treatment lead 3 ... Oscillation circuit 4 ... Amplifier circuit 5 ... Power amplifier circuit 6 ... Impedance matching circuit 7 ... DC power supply 8 ... DC voltage control circuit 9 ... CPU

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Ikuo Onishi 3-3-3 Toyomanami, Nerima-ku, Tokyo F-term in Ito Choshoku Co., Ltd. 4C053 DD09 LL02 LL05 4C082 MC03 ME02 ME11 MG01 MG02 MG03

Claims (2)

[Claims] 1. A method for controlling the output of an ultra-high frequency wave therapeutic device for applying thermal treatment by applying a treatment lead connected via a cord to an affected part of a human body and irradiating ultra-short waves from the lead, comprising the steps of: Power control method in a continuous mode for changing the peak output value of the output microwave; peak power variable for changing the peak output value for a combination of a predetermined output time (pulse width) and a predetermined repetition period of the output microwave. An output control method in a pulse mode; a peak output value of an output ultrahigh frequency wave is fixed as a maximum value, and an output time (pulse width) is set for any one of predetermined repetition periods set in stages. An output control method of changing stepwise; if the output ultra-short wave is in a range of small output power, the peak output value or the repetition period of a predetermined output time (pulse width) is changed and averaged. To control the force, peak power after reaching the maximum value output control method for controlling the average power by changing the repetition period; of, any one by the output control method. 2. The method according to claim 1, wherein the control of the repetition period and the output time (pulse width) is performed by turning on / off a drive power supply of a high-frequency power amplifier circuit by a control pulse train by a CPU. Output control method.