CN1212870C - Microwave therapeutic instrument capable of changing irradiation area - Google Patents

Abstract

The present invention comprises a main instrument body, a coaxial flexible cable, a radiation head, a radiator cover, a lens barrel and a convex lens, wherein the main instrument body is a microwave source, generated microwaves are output through the coaxial flexible cable of which the other end is connected with the radiation head arranged in the center of the radiator cover, the radiator cover is a metal barrel with an enclosed upper end and an open lower end, the lens barrel is a metal barrel with two open ends, the convex lens is arranged in the center of the lens barrel, and the upper end of the lens barrel is connected with the lower end of the radiator cover. The present invention is used for microwave therapy and has the advantage that the irradiation area during microwave therapy can be changed.

Description

Can change the microwave therapy apparatus of irradiated area

The invention belongs to the microwave therapy apparatus technical field.

Microwave therapy apparatus with the microwave irradiation therapy human body diseases has been widely used in medical treatment and health care.Existing many patent applications relate to microwave therapy apparatus, for example " microwave, ultra sonic wave therapeutical instrument for prostate gland diseases 93115128.7 ", " percutaneous intraneoplastic microwave radiator 94104175.1 ", " multi-frequency micro-wave therapeutic instrument 93111800.X ", " traditional Chinese medical science high-efficiency microwave health therapeutic instrument 95116466.X ", " microwave cancer-curing apparatus 86203965 in the body cavity ", " embedding-type cancer treating instrument with microwave radiation 88109737.3 ", " medical micro-wave power allotter and micro-wave therapeutic equipment 93120910.2 " with multichannel output, " microwave heat therapeutic machine for internal cavity of human body 91101429.2 ", " microwave radiator for thermotherapy 91104001.3 ", " microwave resonance therapeutic apparatus 91102744.0 ", " wave therapeutic instrument 97108508.0 ", " medical microwave radiator 97110626.6 ", " microwave-laser therapeutical instrument 96123002.9 ", " outside focus multisource infrared/microwave therapeutic system 96120767.1 " etc.The area of microwave irradiation should adapt with the disease sites that is shone, and should control the size of irradiated area as required, however the irradiated area of these microwave therapy apparatuses all can not change, influence therapeutic effect.The Chinese patent communique discloses a kind of " collimator 94247384.1 of changing ray beam diameter " adopts the collimator in the hole with a plurality of different-diameters to control the size of irradiated area, but when these holes are passed through in radiation, has power loss, and effect is undesirable.

The object of the present invention is to provide a kind of microwave therapy apparatus that changes its irradiated area with lens.

The object of the present invention is achieved like this, and a kind of microwave therapy apparatus that changes irradiated area comprises apparatus subject, coaxial flexiible cable, radiation head, radiator cover, lens drum and convex lens.Apparatus subject is microwave source and control device thereof, the microwave radiation that is produced is exported by coaxial flexiible cable, coaxial flexiible cable inserts radiator cover, its heart yearn other end connects radiation head, its screen layer is connected with radiator cover, radiation head is contained in the central part of radiator cover, and radiator cover is the metallic cylinder of upper end closed, lower ending opening.Lens drum is the metallic cylinder of both ends open, and its upper end is connected with the lower end of radiation shield and is fixing, and lower end contact when treatment aligns therapentic part, and convex lens is equipped with in the stage casing in lens drum.Produced by apparatus subject and to be passed to radiation head and during through convex lens, to be irradiation treatment position by the lower end nozzle that shines lens drum after the convex lens focus by the parallel microwave radiation of radiator cover output, the area of its irradiation is the area that needs therapentic part.The imaging formula of lens is

$\frac{1}{u}+\frac{1}{v}=\frac{1}{f},$ In the formula, u is an object distance, and v is an image distance, and f is the focal length of lens.

The imaging situation of convex lens is as follows:

When object distance u＞2f, image distance v between focal distance f and 2f (be 2f＞v＞f),

When object distance u=2f, image distance v=2f,

When object distance between f and 2f (when being 2f＞u＞f), image distance v＞2f,

When object distance u=f, not imaging,

When object distance u＜f, become virtual image.

When u＞f, change object distance u and focal distance f, can change image distance v size.As u or f is that constant is $\frac{1}{u}=c,$ Or $\frac{1}{f}=c,$ Then $v=\frac{1}{\frac{1}{f}-c}$ Or $v=\frac{1}{c-\frac{1}{u}};$ By $v=\frac{1}{c-\frac{1}{u}}$ As can be known, when object distance u was constant, as increasing focal distance f, then image distance v increased thereupon.By $v=\frac{1}{c-\frac{1}{u}}$ As can be known, when focal distance f is constant, as increase object distance u then image distance v also increase.

The size of irradiated area is relevant with the size of image distance v.When image distance v increased, irradiated area also increased thereupon.So change the focal distance f of convex lens in the lens drum and the object distance u between lens and the radiator cover lower ending opening place, also can adopt and change lens drum with different focal length of lens f and different object distances u, can change the size of irradiated area.

Beneficial effect: the present invention is applied to medical apparatus.Beneficial effect is under the prerequisite of not losing microwave irradiation power, can change the area of radiation irradiation, to adapt to the needs of treatment, has better therapeutic effect.

Description of drawings:

Pathway figure behind the radiation process convex lens that Fig. 1 is sent by radiator cover for structure chart of the present invention reaches.Fig. 1 is described as follows: 1 is apparatus subject, and 2 is coaxial flexiible cable, and 3 is radiation head, and 4 is radiator cover, and 5 is lens drum, and 6 is convex lens.

The specific embodiment

A specific embodiment is as follows: apparatus subject 1 is microwave source and control device thereof, the microwave radiation that is produced is by coaxial flexiible cable 2 outputs, coaxial flexiible cable 2 inserts its heart yearn other end of radiator cover and connects radiation head 3, its screen layer is connected with radiator cover, radiation head 3 is contained in radiator cover 4 central parts, and radiator cover 4 is the metallic cylinder of upper end closed lower ending opening; Lens drum 5 is the metallic cylinder of both ends open, and the upper end is connected with the lower end of radiator cover 4, and lower end contact when treatment aligns therapentic part; Convex lens 6 is equipped with in the stage casing in lens drum 5.

Claims (1)

1, a kind of microwave therapy apparatus that changes irradiated area comprises apparatus subject (1), coaxial flexiible cable (2), radiation head (3) and radiator cover (4), it is characterized in that also comprising lens drum (5) and convex lens (6); Apparatus subject (1) is microwave source and control device thereof, the microwave radiation that is produced is exported by coaxial flexiible cable (2), coaxial flexiible cable (2) inserts its heart yearn other end of radiator cover and connects radiation head (3), its screen layer is connected with radiator cover, radiation head (3) is contained in the central part of radiator cover (4), and radiator cover (4) is the metallic cylinder of upper end closed lower ending opening; Lens drum (5) is the metallic cylinder of both ends open, and the upper end is connected with the lower end of radiator cover (4), and lower end contact when treatment aligns therapentic part; Convex lens (6) is equipped with in the stage casing in lens drum (5); Produced by apparatus subject (2) and to be passed to radiation head (3) and by the parallel microwave radiation of radiator cover opening output during through convex lens (6), the lower end nozzle that shines lens drum (5) after being focused on by convex lens (6) promptly shines the position that needs treatment.

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