JPS6179473A - Microwave warming apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to microwave heating which is particularly effective in cancer treatment.

[Conventional technology]

It is known from various past experiments that cancer cells atrophy when heated to a temperature of approximately 43 degrees Celsius, and cancer can be cured by combining this heating method with radiation therapy. Since then, various methods of locally heating cancer cells (hyperthermia) have been studied.

One of the currently effective methods is about 2450MHz (
This is a method of injecting microwaves at a frequency specified for medical use by the Radio Law from a close distance outside the human body.
A conventional microwave heating device using all of the above methods will be described below.

Figure 2 is a schematic diagram showing a conventional microwave heating system. In the figure, 1 is an irradiation unit equipped with a waveguide and an electromagnetic trumpet, and 03 supported at the tip of a flexible arm 2 is an oscillator. , the irradiation section 1 is connected to this oscillator 3 via a waveguide converter and a coaxial cable 4. 5 is a cooler;
6 is a patient and 7 is a cancer cell.

This microwave heating device brings the cooler 5 into contact with the human body surface above the cancer cells 7, moves the flexible arm 2 to make the irradiation unit 1 face the cancer cells 7, and in this state, the oscillator 3'
! The cancer cell 7 can be heated by irradiating microwaves from the irradiation unit 1 toward the cancer cell 7 by driving the cancer cell 7.

Note that the cooler 5 is used to prevent the vicinity of the skin of the patient 6 from becoming hot due to microwave irradiation and causing burns, and 5at5b indicates a pipe for circulating cooling water.

[Problem that the invention seeks to solve]

However, the conventional microwave heating device mentioned above,
Since the irradiation part consists of a waveguide and an electromagnetic trumpet,
Due to poor focusing of microwaves and large irradiation loss, it is possible to heat the skin to a temperature of approximately 43°C by approximately 1.5 degrees from the surface of the skin.
However, there is a problem in that cancer cells located deeper than 1 cm cannot be heated.

Also, due to the structure in which the irradiation unit and oscillator are connected via a coaxial cable, it is not possible to obtain a large output.
There was a problem in that long-term microwave irradiation was required to heat the material to ℃.

Furthermore, conventionally, it has been considered to improve the convergence of υ microwaves and increase the depth that can be heated by inserting a metal radio wave lens into the electromagnetic trumpet of the irradiation section. However, it is only possible to heat a part deeper than 2 cm to about 43°C, and in this case, the dimensions of the metal-wave lens are determined by the frequency used. There is a problem in that the position becomes larger because the diameter becomes larger and the focal length for focusing the microwave becomes longer.

The present invention was made to solve these problems, and it is possible to heat a region 2 cm or more deep from the skin surface to about 43°C, and it also allows for shortening of irradiation time and miniaturization of the device. Realize microwave member equipment. The purpose is to

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention provides an arm on a pillar that can swing as a motor power source, and an irradiation part that emits microwaves is attached to the tip of the arm, thereby creating a microwave heating device. It is something.

[For use]

According to the above-mentioned method, the dielectric antenna is fully oscillated together with the support, and a beam-type microwave is irradiated from the irradiation part to heat the skin to a depth of approximately 5 to 6 C1n at a temperature of approximately 43°C. It can be warmed up.

〔Example〕

The implementation ψ1j will be described below with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of the microwave heating device according to the present invention, FIG. 3 is a side view showing the internal structure of the irradiation part in FIG. 1, and FIG. 4 is an explanatory diagram showing the operation. .

In IK, 8 is a column, and a predetermined position on its back is connected to @10 of the motor 9, and the column 8 is the entire center of the shaft 10.
is designed to be able to swing in the direction of arrow a.

Reference numeral 11 denotes an arm attached to the front upper part of the support column 8. A support fitting 12 is attached to the tip of this arm 11 so as to be rotatable in the direction of the axis shown by the arrow. 13, fixing and unfixing can be performed.

14 is a case, inside this case 14 is a waveguide 15,
An oscillator 16 directly attached to the waveguide 15 is housed in the opening of the waveguide 15, and a ceramic dielectric antenna 17 whose outer shape tapers toward the tip of the case 14 is housed. It is installed so that it protrudes outward.

These 14 to 17 constitute a microwave irradiation section in this embodiment, and this irradiation section is pivoted inside the U-shaped portion of the support fitting 12 so as to be rotatable in the direction of arrow C. ing. Reference numeral 18 denotes a knob for fixing and releasing the irradiation section.

In other words, the irradiation unit of this embodiment is rotatable in the backward direction (arrow c) when viewed from the front, and can also be rotated in the left and right direction (arrow b) integrally with the support fitting 12, and the axis of the motor 9 10t - It begins to swing in the direction of arrow a as a medium.

19 is a balance weight attached to the lower end of the support column 8, and 20 is a cord for supplying power to the oscillator 16 from a power source (not shown).

Next, to explain the effect, first, as shown in FIG. The shaft 10 of the motor 9 in FIG. 1 is positioned at a height of . This positioning is performed by vertically moving the entire apparatus shown in FIG. 1 by means not shown.

Next, the irradiation section having the dielectric antenna 11 is moved in the directions of arrows A and C, so that the tip of the dielectric antenna 17 faces the cancer cell 7 .

In this state, the irradiation section is swung at a fixed angle in the direction of arrow C with the shaft 11 as the center of the irradiation section integrally with the support 8, and a nine-sided oscillator 16 is installed in the case 14 of the irradiation section.
A dielectric antenna 1 is driven and attached to a waveguide 15.
7, microwave sound is irradiated toward the irradiation point P of the cancer cell 7.

In this embodiment, since the oscillator 16 is attached to the waveguide 15 and microwaves can be generated directly from the oscillator 16 into the waveguide 15, a large output can be obtained.
Moreover, the J5 shin body antenna 17 made of ceramic can withstand a large output of about 700 W, and at the same time, can radiate well-focused microwaves in a Penful beam shape with little irradiation loss.

In addition, as shown in Fig. 4, microwave irradiation is performed by swinging the dielectric antenna 17i, so even if point P is deep from the surface of the human body, the focus is on point P. 7 cancer cells in a short period of time by irradiating them with microwaves.
It can be heated to 3°C.

According to experiments, it has been confirmed that when the sound of the device of the present invention is used, it is possible to heat the human body to a depth of about 5 to 6 crni degrees to about 43C, and it is possible to heat the human body to 43C with short irradiation. there were.

The dielectric antenna 17 used in the present invention is a solid body with no internal cavity, and its shape may be a truncated pyramid shape as shown in the figure, or a truncated cone shape. It is good to set it to about 4 to 8 times.

[5 Effects of the Invention] As explained above, the present invention has a structure in which an arm is provided on a pillar that is connected to a motor etc. so that it can swing, and an irradiation part is attached to the tip of the arm. In addition to ensuring that the attached oscillator can obtain a large output, the dielectric antenna emits highly focused microwaves with little irradiation loss to irradiate cancer cells, and at the same time, the irradiation part is oscillated. By irradiating a single point inside the human body, it is possible to heat the body to about 43 degrees Celsius in a short time from the surface of the human body to a deep region of about 5 to 6 crm. It has the effect of providing heating treatment.

Further, since the present invention uses a dielectric antenna made of ceramic, there is an effect that the device can be made smaller compared to the case where a gold@radio wave lens is used.

Furthermore, when a human body is irradiated with microwaves at a constant rate, high heat is generated on the surface of the irradiated human body, but in the present invention, irradiation is performed without shaking the irradiation part, so there is no concentration of heat and the patient's skin RF4 '4 has the advantage of being able to prevent damage, and has the effect of improving safety.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the microwave heating device according to the present invention, Fig. 2 is a schematic view showing a conventional example, and Fig. 3 is a side view showing the internal fj4 structure of the irradiation section in Fig. 1. Figure, 4th
The figure is an explanatory diagram showing the action. 08: Strut 9: Motor
10: Axis 11: Arm 12: Support metal fitting 14: Case 15: 4-wave tube 16: Oscillator 17: Dielectric antenna patent applicant Chest Co., Ltd. agent Patent attorney Takashi Kanakura Fuitsode 2 ■ Grape 3-

Claims (1)

[Claims] 1. A microwave heating device characterized in that an arm is provided at the top of a column that swings using a motor as a power source, and an irradiation unit that emits microwaves is attached to the tip of the arm. . 2. The microwave heating device according to claim 1, which uses an irradiation section including an oscillator, a waveguide, and a dielectric antenna. 3. The microwave heating device according to claim 2, wherein the oscillator is directly attached to the waveguide.