KR20140137731A - Apparatus for Radiation Dose Measuring capable of driving the horizontal and rotated and Radiation Detection Devices thereof - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiation dose measuring apparatus and a radiation detecting apparatus therefor, which can remove and insert various kinds of human models, maintain a correct incident angle from a rotating radiation generating apparatus, According to the present invention, A fixing plate for selectively attaching and fixing the human body on the upper part thereof, and transmitting the radiation of the radiation generating part through the fixed human body model; A scintillation plate formed under the fixing plate and excited by radiation penetrating the human body to generate light; A reflection plate formed below the scintillation plate and refracting and reflecting light generated from the scintillation plate at a predetermined angle; A radiation detector including a camera for capturing light reflected from the reflection plate to form an image; A drive control unit that mounts the radiation detection unit on a moving plate, moves the substrate in a horizontal direction or rotates the substrate in a vertical direction; An image processor for analyzing an image formed by the camera of the radiation detector and measuring a radiation dose transmitted to the human body model; And a display unit for displaying the processed image in the image processing unit as a 2D or 3D image.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiation dose measuring apparatus and a radiation dose measuring apparatus,

The present invention relates to a radiation dose measuring apparatus, and more particularly to a radiation dose measuring apparatus capable of attaching and detaching various kinds of human models, maintaining an accurate incident angle from a rotating radiation generating apparatus, And a radiation detector.

Cancer Therapy can be divided into Surgery, Chemotherapy, and Radiation Therapy. With the increase in population, the number of cancer patients has been greatly increased due to the development of diagnostic technology, and especially the role of radiation therapy is increasing recently. The ultimate goal of radiation therapy is to maximize the protection of normal cells to minimize radiation dose and to maximize radiation dose to tumor cells.

In recent years, with the advent of high-tech equipment such as cyber knife and tomothecopy, optimal dose distribution of tumor tissue can be obtained. Particle therapy, especially proton and carbon, is characterized by its unique physical properties, namely the use of Bragg Peak. Bragg peak refers to the phenomenon that the amount of energy absorption in the body reaches its peak at the time of reaching the cancer tissue when the human body is permeable to the cancer, and thus a specific amount of energy absorption occurs in the cancer tissue.

For an ideal optimal dose distribution, the patient's treatment planning is determined by a strong dose change in the tumor tissue. Therefore, a high level of accurate treatment within a few millimeters is required, and more accurate quality assurance for treatment is required.

The present applicant has disclosed a radiation dose measuring apparatus capable of measuring a radiation dose in vivo using a scintillation plate in Korean Patent Registration No. 10-1203676 (November 15, 2012).

According to the disclosed prior art, the dose distribution of in vivo radiation irradiated with particulate radiation using a human body and a scintillation plate can be measured simply, quickly, and accurately.

However, since the human body model is fixed to the apparatus, various kinds of human models can not be used, and it is difficult to maintain an accurate incident angle from the rotated radiation generating apparatus, and it is difficult to reduce the size and weight by increasing the number of device components.

Korean Registered Patent No. 10-1203676 (November 15, 2012)

SUMMARY OF THE INVENTION The present invention has been made in order to overcome the above-described problems of the prior art, and it is an object of the present invention to provide a radiographic apparatus and a radiographic apparatus capable of attaching / detaching various kinds of human models, An object of the present invention is to provide a dose measuring apparatus and a radiation detecting apparatus therefor.

According to an aspect of the present invention, there is provided a lithographic apparatus comprising: a radiation generator; A fixing plate for selectively attaching and fixing the human body on the upper part thereof, and transmitting the radiation of the radiation generating part through the fixed human body model; A scintillation plate formed under the fixing plate and excited by radiation penetrating the human body to generate light; A reflection plate formed below the scintillation plate and refracting and reflecting light generated from the scintillation plate at a predetermined angle; A radiation detector including a camera for capturing light reflected from the reflection plate to form an image; A drive control unit that mounts the radiation detection unit on a moving plate, moves the substrate in a horizontal direction or rotates the substrate in a vertical direction; An image processor for analyzing an image formed by the camera of the radiation detector and measuring a radiation dose transmitted to the human body model; And a display unit for displaying the image processed by the image processing unit as a 2D or 3D image.

The radiation generating part is formed in a cylindrical shape and rotates along an outer peripheral surface thereof, and the drive control part rotates the moving plate constantly along the rotation angle of the radiation generating part, so that the radiation from the radiation generating part enters the fixed plate in a vertical direction .

The human body may have a triangular prism shape, a rectangular plate shape may have a plurality of stacked shapes, or an irregular polygonal shape.

The human body model may be PMMA (poly methyl methacrylate).

Preferably, the fixing plate further includes a gripping part for attaching or detaching the human body, if necessary.

And the radiation transmitted through the human body is attenuated along the shape of the human body moving in the horizontal direction and input to the flash plate.

Wherein the drive control unit comprises: A linear motor for moving the moving plate in a horizontal direction; And a rotating motor for rotating the moving plate in a vertical direction.

Another feature of the present invention resides in that a fixing plate for selectively attaching and detaching a human body on an upper portion thereof and transmitting the radiation through the fixed human body model; A scintillation plate formed under the fixing plate and excited by radiation penetrating the human body to generate light; A reflection plate formed below the scintillation plate and refracting and reflecting light generated from the scintillation plate at a predetermined angle; And a camera for photographing light reflected from the reflection plate to form an image.

According to the apparatus for measuring radiation dose of horizontal and rotationally driven according to the present invention and the radiation detecting apparatus therefor, it is possible to provide various types of human body models such as a triangular prism, a rectangular plate, Shaped PMMA and the like can be attached and detached, an accurate incident angle can be maintained from the rotated radiation generating device, and the device can be made compact and lightweight by simplifying the parts.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a radiation dose measuring apparatus capable of horizontally and rotationally driving according to a preferred embodiment of the present invention and its radiation detecting apparatus.
FIG. 2 is a cross-sectional view illustrating various types of human models according to a preferred embodiment of the present invention; FIG.
3 and 4 are perspective views showing a radiation dose measuring apparatus capable of horizontal and rotational driving according to a preferred embodiment of the present invention.
FIG. 5 is a perspective view illustrating a state in which radiation is incident on a human body by a radiation dose measuring apparatus capable of horizontally and rotationally driving according to a preferred embodiment of the present invention. FIG.
6 is a view showing a 2D image photographed by a camera according to the apparatus configuration of Fig. 5; Fig.
7 and 8 are views showing an image processed by the image processing tool in the image processing unit of the present invention.
9 is a photograph showing a beam shape attached to a radiation generating part according to an embodiment of the present invention to form a beam shape.
FIGS. 10 and 11 are views showing images processed using the beam shape of FIG. 9. FIG.
12 and 13 are perspective views showing a radiation dose measuring apparatus using a radiation generating part formed in a cylindrical shape according to a preferred embodiment of the present invention and rotating along its outer circumferential surface.

The present invention may have various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. It should be understood, however, that it is not intended to limit the specific embodiments of the invention but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Although the terms first, second, etc. disclosed in the present invention can be used to describe various components, the components should not be limited by the terms, and the terms may be used to distinguish one component from another To be used only for the purpose of

Accordingly, the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention, and the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise.

In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Spatially relative terms such as below, beneath, lower, above, upper, and the like facilitate the correlation between one element or elements and other elements or elements as shown in the figure Can be used for describing. Spatially relative terms should be understood to include, in addition to the orientation shown in the drawings, terms that include different orientations of the device during use or operation.

For example, when inverting an element shown in the figure, an element described below (beneath) another element may be placed above or above another element. Thus, an exemplary term, lower, may include both lower and upper directions. The elements can also be oriented in different directions, so that spatially relative terms can be interpreted according to orientation.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram illustrating a radiation dose measuring apparatus and a radiation detecting apparatus according to a preferred embodiment of the present invention. FIG. 2 is a block diagram of a radiation dose measuring apparatus for horizontal and rotational driving according to a preferred embodiment of the present invention. FIGS. 3 and 4 are perspective views showing a radiation dose measuring apparatus capable of horizontal and rotational driving according to a preferred embodiment of the present invention. FIG.

As shown in the drawing, the horizontal and rotationally movable radiation dose measuring apparatus according to an embodiment of the present invention includes a radiation generating unit 100, a human body model 210, a fixing plate 220, a scintillation plate 230, A moving plate 260, a driving control unit 500, an image processing unit 300, and a display unit 400. The radiation detecting unit 200 includes a reflection plate 240, a camera 250,

The radiation generating unit 100 generates a predetermined radiation. The radiation herein includes both conventional proton beams, particle radiation including carbon beams, and various other types of radiation and similar radiation that are currently used or predicted.

The radiation detecting unit 200 includes a fixing plate 220, a scintillation plate 230, a reflection plate 240, and a camera 250.

The fixed plate 220 selectively removes and fixes the torso 210 on the upper portion thereof and transmits the radiation of the radiation generating portion 100 through the fixed torso 120.

The fixing plate 220 may further include a grip portion 221 for attaching or separating any one of the human body models 210 as needed.

The incident radiation transmitted through the human body 210 is attenuated along the shape of the human body 210 moving in the horizontal direction and input to the flashing plate 230.

The scintillating plate 230 is formed under the fixing plate 220 and is excited by the radiation transmitted through the human body 210 to generate light.

The scintillating plate 230 may be an organic scintillation plate made of plastic or the like, an inorganic scintillation plate made of a crystalline material, or the like. Organic scintillation plates can have similar densities to water. The scintillating plate 230 may be excited by the particle radiation passing through the torso 210 to generate radiation such as x-rays.

The energy level of the scintillation plate 230 is present as a valance band and a conduction band on the principle that the scintillation plate 230 generates radiation. When particle radiation enters the scintillation plate 230, The electrons that were present are raised to the conduction band. Then, the electrons are drawn through the electron hole to maintain the equilibrium state. At this time, the electron is generated by the energy difference between the electron beam and the conduction band (fluorescence). Or other material is doped in the scintillation plate 120, metastable states may be generated near the conduction band, and the electrons in the conduction band may fall to the semi-equilibrium state without dropping to the electrical potential, (Phosphorescence).

The reflection plate 240 is formed below the scintillation plate 230 and refracts and reflects light generated from the scintillation plate 230 at a predetermined angle.

The reflection plate 240 reflects radiation such as an X-ray generated at the flash plate 230, which is positioned below the flash plate 230, and directs the radiation to the lens of the camera 250. The reflection plate 240 may be in the form of a flat plate inclined at a predetermined angle with respect to the scintillation plate 230. The angle formed between the reflection plate 240 and the scintillation plate 230 may be approximately 45 ° and may have a geometrically stable structure capable of directing light to the lens of the camera 250.

The camera 250 photographs light reflected from the reflection plate 2140 to form an image. The camera 250 is a camera for photographing a normal image, and for example, a CCD camera may be used. In addition, the camera 250 may include an infrared camera and a thermal camera.

The driving control unit 500 mounts the radiation detecting unit 200 on the moving plate 260, and moves it in the horizontal direction or rotates it in the vertical direction.

The moving plate 260 can move the radiation detecting unit 200 in a one-dimensional or two-dimensional manner perpendicular to the incidence direction of the radiation while the particle radiation is incident on the torso 210. At this time, the moving plate 260 moves the torso 210 so that the radiation can move along the shape of the torso 210 to detect information of different penetration depths. . ≪ / RTI >

To this end, the drive control unit 500 includes a linear motor 510 for moving the moving plate 260 in a horizontal direction; And a rotating motor 520 for rotating the moving plate 260 in the vertical direction.

The radiation detecting unit 200 is supported by the bottom frame 203 and the side frame 202. The cover 201 can be installed on the upper part of the radiation detecting unit 200 so as to be shielded from external light or noise. ) Is desirably provided with a metal frame such as aluminum and a black wall.

The image processing unit 300 analyzes the image formed by the camera 250 of the radiation detecting unit 200 and measures the radiation dose transmitted to the human body model 210.

The display unit 400 displays the processed image in the image processing unit 300 as a 2D or 3D image.

2, the human body model 210 may have a triangular prism shape (a), a rectangular plate shape may have a plurality of stacked shapes (b), or an irregular polygonal shape (b).

At this time, it is preferable that the human body model 210 is PMMA (poly methyl methacrylate).

The radiation detecting apparatus of the present invention may be configured such that the human body model 210 is selectively attached to and detached from the upper part of the radiation detecting section 200 and the radiation is transmitted through the human body model 120 A fixing plate 220; A scintillation plate 230 formed below the fixing plate 220 and excited by radiation transmitted through the torso 210 to generate light; A reflection plate 240 formed below the scintillation plate 230 and refracting and reflecting light generated from the scintillation plate 230 at a predetermined angle; And a camera 250 for photographing light reflected from the reflection plate 2140 to form an image.

FIG. 5 is a perspective view illustrating a state in which radiation is incident on a human body by a radiation dose measuring apparatus capable of horizontally and rotationally driving according to a preferred embodiment of the present invention. FIG. 6 is a cross- And FIGS. 7 and 8 are views showing images processed by the image processing tool in the image processing unit of the present invention.

As shown in the figure, the radiation detector 200 is positioned on the moving plate 260 so that the radiation irradiated from the radiation generator 100 in the upper direction passes through the torso 210 and is irradiated by the stimulable phosphor plate 230 Is reflected by using the reflection plate 240, and is photographed by the camera 250. In this case,

When the radiation enters the human body 210, neutrons, gamma rays, electrons, etc. may be generated secondarily. Among them, the most influential device is the neutron, the neutron decreases with distance and it can be changed according to the angle of the treatment head (gantry). In particular, the camera 250 is most affected by neutrons. When a neutron is incident on the camera 250, defective pixels may occur in the camera 250, and defective pixels appear as white spots in the image. A shield (not shown) for shielding the camera 250 from neutrons may be used to reduce the generation of defective pixels due to such neutrons. In order to maximize the neutron shielding effect, it is preferable that the body except for the lens part of the camera 250 be surrounded by a shielding body.

In addition, the image processing unit 300 may analyze the image acquired by the camera 250 as a two-dimensional radiation dose distribution image through software. Such a two-dimensional radiation dose distribution image needs to be corrected. Since the scintillation plate 230 is dependent on the linear energy transfer, the excitation electron interferes with the particle radiation passing through the torso 210 and the scintillation plate 230 generates the X-rays and loses energy. And excites the molecules of the scintillation plate 230 in the vicinity. In other words, linear energy transfer (LET) is used to excite molecules, thereby interfering with the generation of X-rays. As a result, the relationship between the line energy transfer value and the output of the x-ray loses linearity. This is called a quenching effect. To correct this quenching effect, output data of the particle radiation passing through the torso 250 is needed.

As shown, the moving part 260 is driven while the radiation generating part 100 irradiates the human body model 210 with radiation, and then the human body model 210 is scanned to measure the intensity of the particle radiation passing through the human body model 210 And the output data is measured. The image processing unit 300 corrects the two-dimensional dose distribution image using the output data of the particle radiation. This process is called a quenching correction algorithm.

The image processing unit 300 may convert the corrected two-dimensional radiation dose distribution image into a three-dimensional radiation dose distribution image using an image reconstruction program. The 3D dose distribution image can be imaged by using the image reconstruction program. To obtain a three-dimensional radiation dose distribution image for cancer tissue, a block and a compensator may be mounted on the treatment head of the particle radiation generator.

FIG. 9 is a photograph showing a beam shape for attaching a beam to a radiation generating unit according to an embodiment of the present invention, and FIGS. 10 and 11 are views showing images processed using the beam shape of FIG. 9 .

According to this configuration, a beam shape-type model is attached to the radiation generating unit 100, and 2D and 3D images as shown in FIGS. 10 and 11 can be obtained when the radiation is transmitted.

12 and 13 are perspective views showing a radiation dose measuring apparatus using a radiation generating part formed in a cylindrical shape according to a preferred embodiment of the present invention and rotating along its outer circumferential surface.

As shown in the figure, the radiation generating part 100 is formed in a cylindrical shape and rotates along the outer circumference of the radiation generating part 100, and the driving control part 500 controls the moving plate 260 so that the rotation angle of the radiation generating part 100 is So that the radiation is emitted from the radiation generating unit 100 to the fixing plate 220 in a vertical direction.

The embodiments of the present invention described in the present specification and the configurations shown in the drawings relate to the most preferred embodiments of the present invention and are not intended to encompass all of the technical ideas of the present invention so that various equivalents It should be understood that water and variations may be present. Therefore, it is to be understood that the present invention is not limited to the above-described embodiments, and that various modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims. , Such changes shall be within the scope of the claims set forth in the claims.

100: radiation generating unit 200: radiation detecting unit
210: Human body model 220: Fixed plate
221: grip part 230: scintillation plate
240: reflector 250: camera
260: moving plate 300: image processing unit
400: Display unit 500:
510: Linear motor 520: Rotary motor

Claims (16)

A radiation generator;
A fixing plate for selectively attaching and fixing the human body on the upper part thereof, and transmitting the radiation of the radiation generating part through the fixed human body model; A scintillation plate formed under the fixing plate and excited by radiation penetrating the human body to generate light; A reflection plate formed below the scintillation plate and refracting and reflecting light generated from the scintillation plate at a predetermined angle; A radiation detector including a camera for capturing light reflected from the reflection plate to form an image;
A drive control unit that mounts the radiation detection unit on a moving plate, moves the substrate in a horizontal direction or rotates the substrate in a vertical direction;
An image processor for analyzing an image formed by the camera of the radiation detector and measuring a radiation dose transmitted to the human body model; And
And a display unit for displaying the image processed by the image processing unit as a 2D or 3D image. The method according to claim 1,
The radiation generating part is formed in a cylindrical shape and rotates along an outer peripheral surface thereof,
Wherein the drive control unit rotates the moving plate constantly along the rotation angle of the radiation generating unit and controls the radiation generating unit to make the radiation enter the vertical plate in the vertical direction. Device. The method according to claim 1,
Wherein the human body model is a triangular prismatic shape. The method according to claim 1,
Wherein the human body model has a plurality of rectangular plate shapes laminated on each other. The method according to claim 1,
Wherein the human body model is an irregular polygonal shape. 6. The method according to any one of claims 3 to 5,
Wherein the human body model is PMMA (poly methyl methacrylate). The method according to claim 1,
Wherein the fixing plate further comprises a gripping portion for attaching or separating the human body model as needed. The method according to claim 1,
Wherein the radiation transmitted through the human body is attenuated along the shape of the human body moving in the horizontal direction and inputted to the scintillation plate. The method according to claim 1,
Wherein the drive control unit comprises:
A linear motor for moving the moving plate in a horizontal direction;
And a rotating motor for rotating the moving plate in a vertical direction. A fixing plate for selectively attaching and fixing the human body on the upper part thereof, and transmitting the radiation through the fixed human body model;
A scintillation plate formed under the fixing plate and excited by radiation penetrating the human body to generate light;
A reflection plate formed below the scintillation plate and refracting and reflecting light generated from the scintillation plate at a predetermined angle; And
And a camera for photographing light reflected from the reflection plate to form an image. 11. The method of claim 10,
Wherein the human body model is a triangular prism. 11. The method of claim 10,
Wherein the human body model is formed by stacking a plurality of rectangular plate shapes. 11. The method of claim 10,
Wherein the human body model is an irregular polygonal shape. 14. The method according to any one of claims 11 to 13,
Wherein the human body model is PMMA (poly methyl methacrylate). 11. The method of claim 10,
Wherein the fixing plate further comprises a gripping part for attaching or detaching the human body, if necessary. 11. The method of claim 10,
Wherein the radiation transmitted through the human body is attenuated along the shape of the human body moving in the horizontal direction and inputted to the flash plate.

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