A stereotactic head radiotherapy device

Abstract

The present invention relates to a stereotactic head radiotherapy device, including a rotating drum, a rotating disk, a treatment head and a radiation source, wherein the rotating disk is arranged to rotate obliquely on the rotating drum, the treatment head is arranged to rotate in the rotating disk, and the radiation source is installed in the treatment head. The rotating disk and the rotating drum form a certain angle to improve space utilization. The inclined setting effectively shortens the distance from the radiation source ray outlet to the focusing point, indirectly prolongs the service life of the radiation source, or reduces the use dose of the radiation source, saving costs. At the same time, the present invention has two degrees of freedom of rotation focusing, which can avoid sensitive nerves and reduce the side effects of metered irradiation.

Description

Technical Field

[0001] The invention belongs to the technical field of medical radiation, and in particular relates to a stereotactic head radiotherapy device. Background Art

[0002] Before using the Gamma Knife treatment device, other examination imaging equipment is needed to determine the specific position of the patient's head tumor relative to the invasive positioning device, so as to fix the patient's head according to the specific position of the patient's head tumor in the invasive positioning device. Gamma Knife treatment is divided into head Gamma Knife treatment and body Gamma Knife treatment. Head Gamma Knife treatment is to install multiple cobalt sources in a spherical helmet to focus them on a certain point in the skull to form a narrow beam of gamma rays with sharp edges. During treatment, the narrow beam of rays is focused on the lesion to form a limited high-dose area to destroy the lesion. It is mainly used to treat small intracranial tumors and functional diseases. Body Gamma Knife treatment is mainly used to treat various tumors throughout the body.

[0003] At present, clinical gamma knife for head can be divided into two categories: fixed and non-rotatable radiation source equipment and single rotation focusing of radiation source. Rotation focusing equipment has the characteristics of good protection of normal tissues and mild side effects of treatment, but it has the following shortcomings:

[0004] First, the radiation emitted from the treatment head of the existing gamma knife is perpendicular to the central axis of the drum. The vertical radiation irradiation method requires a certain distance between the treatment head and the patient, which increases the volume of the gamma knife device itself.

[0005] Second, the distance from the radiation source ray outlet to the focal point is the source focal length. The longer the source focal length, the more radiation source metering is required, which invisibly increases the cost of purchasing the radiation source.

[0006] Third, the existing treatment equipment does not have enough free rotation degree and cannot effectively improve the space utilization rate. Summary of the invention

[0007] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a stereotactic head radiotherapy device which has a simple structure, is easy to operate and has two degrees of freedom of rotational focusing.

[0008] To achieve the above-mentioned purpose, the present invention adopts the following technical solution: a stereotactic head radiotherapy device, comprising a rotating drum, a rotating disk, a treatment head and a radiation source, wherein the rotating disk is tilted and rotated on the rotating drum, the treatment head is rotationally arranged in the rotating disk, and the radiation source is installed in the treatment head.

[0009] Furthermore, the inclined rotating disk forms an angle α with the central axis of the rotating drum, wherein 15°≤α≤85°.

[0010] Furthermore, the angle formed between the inclined rotating disk and the central axis of the rotating drum is 24°, 36° or 45°.

[0011] Furthermore, a turntable mounting opening is obliquely provided on the outer peripheral surface of the rotating drum.

[0012] Furthermore, a circle of trapezoidal steps is provided on the circumferential surface of the turntable installation opening.

[0013] Furthermore, a disc-type bearing is provided on the trapezoidal step.

[0014] Furthermore, the rotating disk is fixedly arranged on the bearing.

[0015] Furthermore, the interior of the rotating drum is hollow, an opening is provided on an end surface of one end of the rotating drum, a diameter of the rotating drum gradually decreases from the opening end to the other end, and shrinks and closes at the other end of the drum body.

[0016] Furthermore, a rotating shaft is provided at the other end of the rotating drum.

[0017] Furthermore, it also includes a base, and the rotating drum is rotatably arranged on the base.

[0018] The present invention adopts the above technical solution, and the oblique rotation of the rotating disk is set on the rotating drum, the treatment head is rotatably set in the rotating disk, and the radiation source is installed in the treatment head.

[0019] The angle formed between the tilted rotating disk and the central axis of the rotating drum is 15°≤α≤85°, and the rotating disk and the rotating drum form a certain angle, which improves space utilization. Compared with the existing vertical radiation irradiation method, in the drum structure provided by the present invention, a treatment head is installed in the turntable mounting port. Since the turntable mounting port is tilted on the rotating drum, and since the present invention is only for gamma knife treatment of the head, the tilted setting method effectively shortens the distance from the radiation source ray outlet to the focusing point, indirectly extending the service life of the radiation source, or reducing the dosage of the radiation source, saving costs. At the same time, the present invention has two degrees of freedom of rotation focusing, which can avoid sensitive nerves and reduce the side effects of metered irradiation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1It is a schematic diagram of the structure of the stereotactic head radiotherapy device of the present invention;

[0022] Figure 2 It is one of the cross-sectional views of the stereotactic head radiotherapy device of the present invention;

[0023] Figure 3 This is the second cross-sectional view of the stereotactic head radiotherapy device of the present invention;

[0024] Figure 4 It is a schematic diagram of the explosion of the stereotactic head radiotherapy device of the present invention.

[0025] In the figure: 1, rotating drum; 2, rotating disk; 3, treatment head; 4, radiation source; 5, beveled surface; 6, turntable mounting opening; 7, trapezoidal step; 8, bearing; 9, opening; 10, rotating shaft; 11, base α, the inclined rotating disk forms an angle with the central axis of the rotating drum. DETAILED DESCRIPTION

[0026] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0027] like Figure 1 and Figure 2 As shown, this embodiment provides a stereotactic head radiotherapy device, including a rotating drum 1, a rotating disk 2, a treatment head 3 and a radiation source 4, wherein the rotating disk 2 is tilted and rotatably arranged on the rotating drum 1, the treatment head 3 is rotatably arranged in the rotating disk 2, and the radiation source 4 is installed in the treatment head 3.

[0028] In this embodiment, the tilted rotating disk 2 forms an angle α with the central axis of the rotating drum 1, wherein 15°≤α≤85°. Preferably, the tilted rotating disk 2 forms an angle of 24°, 36° or 45° with the central axis of the rotating drum 1.

[0029] like Figure 2 and Figure 3 As a preferred embodiment, in the stereotactic head radiotherapy device provided in this embodiment, an inclined bevel surface 5 is provided on the outer periphery of the rotating drum, the turntable mounting opening 6 is obliquely provided on the bevel surface 5, a circle of trapezoidal steps 7 is provided on the circumference of the turntable mounting opening 6; a disc-shaped bearing 8 is provided on the trapezoidal step 7. The rotating disk 2 is fixedly provided on the bearing 8.

[0030] In the stereotactic head radiotherapy device provided by the present invention, a radiation source 4 is installed in the treatment head 3, and the radiation source 4 can be switched on and off and collimated and focused. The rotating disk 2 and the rotating drum 1 have a certain angle α, and the angle α can be used to reduce the source focal length of the radiation source 4 and increase the available space of the device. The device first realizes conical rotation focusing (degree of freedom 1) by rotating the rotating disk 2 on which the treatment head 3 is installed, and its focus is on the axis of the rotating drum 1. Secondary rotation focusing (degree of freedom 2) is realized by rotating the drum. The present invention has the functions of focusing irradiation and two-degree-of-freedom rotation focusing irradiation through a collimator, and can realize the free selection of the incident angle of head irradiation.

[0031] like Figure 4 As shown, as a preferred embodiment, in the stereotactic head radiotherapy device provided in this embodiment, the interior of the rotating drum 1 is hollow, and an opening 9 is provided on the end surface of one end of the rotating drum 1. The diameter of the rotating drum 1 gradually decreases from the end of the opening 9 to the other end, and shrinks and closes at the other end of the drum body. A rotating shaft 10 is provided at the other end of the rotating drum 1. The stereotactic head radiotherapy device provided in this embodiment also includes a base 11, and the rotating drum 1 is rotatably provided on the base 11.

[0032] The present invention sets the rotating disk 2 to rotate obliquely on the rotating drum 1, the treatment head 3 is rotatably set in the rotating disk 2, and the radiation source 4 is installed in the treatment head 3. The obliquely set rotating disk 2 forms an angle of 15°≤α≤85° with the central axis of the rotating drum 1, and the rotating disk 2 forms a certain angle with the rotating drum 1 to improve space utilization. Compared with the existing vertical radiation irradiation method, in the drum structure provided by the present invention, the treatment head 3 is installed in the turntable mounting port 6. Since the turntable mounting port 6 is obliquely set on the rotating drum 1, and since the present invention is only for gamma knife treatment of the head, the oblique setting method effectively shortens the distance from the radiation outlet of the radiation source 4 to the focusing point, indirectly prolongs the service life of the radiation source 4, or reduces the dosage of the radiation source 4, saving costs. At the same time, the present invention has two degrees of freedom of rotational focusing, which can avoid sensitive nerves and reduce the side effects of metered irradiation.

[0033] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A stereotactic head radiotherapy device, characterized in that: It comprises a rotating drum, a rotating disk, a treatment head and a radiation source, wherein the rotating disk is arranged on the rotating drum in an inclined manner, the treatment head is arranged in a rotation manner in the rotating disk, and the radiation source is installed in the treatment head; The angle formed between the inclined rotating disk and the central axis of the rotating drum is 24°, 36° or 45°; A turntable mounting opening is obliquely provided on the outer circumference of the rotating drum; A circle of trapezoidal steps is arranged on the circumferential surface of the turntable mounting opening; A disc-type bearing is provided on the trapezoidal step; The rotating disk is fixedly arranged on the bearing; The rotating drum is hollow inside, and an opening is formed on an end surface of one end of the rotating drum. The diameter of the rotating drum gradually decreases from the opening end to the other end, and shrinks and closes at the other end of the drum body. The other end of the rotating drum is provided with a rotating shaft.

2. The stereotactic head radiotherapy device according to claim 1, characterized in that: It also includes a base, and the rotating drum is rotatably arranged on the base.

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