KR20030086400A - The Antiscattering Grid and the Manufacturing Method which is using Digital Radiography System - Google Patents

Abstract

The present invention relates to a non-scattering grid (Antiscatter Grid) applied to X-ray imaging using a digital radiation system (Digital Radiography System), the polymer (Kapton), Ultem which is a transparent plastic material of a polymer system having excellent X-ray transmittance Interspacer is made of (Ultem) and other heat-resistant plastics, and after melting, depositing, and depositing lead in the microcavity formed after injection molding, extrusion molding, or processing the transparent plastic, selenium, cesium eye Adhesive coating of fluorescent material (Phosphor) that converts X-rays other than Cesium Iodide to visible light and fixing the suture by using cover material with excellent X-ray transmittance such as carbon and acrylic It is a grid made by making.

Unlike conventional non-scattering grids, X-rays are converted to visible light to provide a cleaner, brighter diagnostic radiographic image as an initial image to the digital radiography system, which can dramatically reduce the amount of radiation exposed to patients during X-ray imaging. It is an advantage, and by using injection molding and extrusion molding using ultra-precision mold, it is possible to improve the non-uniform image that was a problem in the existing digital image to more clear and uniform image and provide it to the digital radiation system. By reducing the image processing step, it is possible to reduce the software processing cost of the digital radiation system and to commercialize the digital diagnostic radiation to provide a clearer and clearer image to the patient at a lower dose.

Description

The antiscattering grid and the manufacturing method which is using digital radiography system

In general, X-rays that are widely applied in general hospitals / clinics are provided so that doctors can effectively treat the abnormal parts of the patients on the X-ray film, so that the scattering grid used is In general, X-ray imaging has been used to make the image more clearly displayed on the film, the grid of this method is diffuse reflection and scattering as the primary radiation projected from the imaging device through the human body during diagnostic X-ray imaging This increases the line, which in turn affects the X-ray film, reducing contrast, sharpness and resolution and preventing poor image quality, and this non-scattering grid is placed between the human body and the X-ray film to remove scattered lines. Will be located.

In addition, the conventional non-scattering grid is composed of an intermediate material of aluminum material and an absorber material (thin film) of lead material, and the narrow and long strips are composed of a plurality of layers of a constant interval and a continuous arrangement.

As the internet base becomes active, the necessity of telemedicine is emerging in the medical field, which requires the conversion from conventional analog X-ray film image to digital image for X-ray imaging of diagnostic radiation system. With the commercialization of radiation diagnosis, the ripple effect has led to the diagnosis between hospitals and home care using the Internet, and the accuracy of X-ray images has become an important situation. During the process, clarity and accuracy of the image are required, and the loss of X-ray image data such as an increase in X-ray dose due to a decrease in X-ray transmittance, a decrease in image quality brightness and a wave pattern on the film, and loss of image data due to scattered radiation Min There is an urgent need for grids for digital radiation systems.

However, the non-scattered grid, which has been conventionally applied, has a low straightness of the internal lattice, which reduces the overall uniformity of the image during digital radiography. In particular, when the intermediate material is made of metallic material such as aluminum, the transmittance decreases according to the attenuation rate of X-rays. As the brightness and business cards are lowered during digital image processing, the X-ray exposure amount is increased during X-ray imaging to improve this problem, which causes a problem of stability for the patient.

In addition, when the X-rays are transmitted through the fluorescent material applied to the detector surface of the digital radiation system, the dose of X-rays is lost due to the reflection reaction, which reduces the brightness of the image during effective image processing. Economically and temporally unreasonable, there is a need for a device having a function of integrating a non-scattering grid and a fluorescence role of a detector.

The present invention applies a method such as injection molding, extrusion molding, or precision processing, applies a polymer-based intermediate material having excellent transparency, and applies a fluorescent material that converts X-rays into visible light, which is a part of a digital radiation system, to make an image uneven. It was conceived to reduce the X-ray exposure and improve the transmittance, and to enable low-dose digital radiography, in which an image plate was processed instead of a film by using fluorescent materials.

The present invention relates to a non-scattering grid (Antiscatter Grid) applied to a digital radiation system (Digital Radiography System) and a method for manufacturing the same, which is a transparent plastic material of the polymer (Kapton), Ultem excellent in X-ray transmittance Interspacer is made of (Ultem) or heat-resistant plastic, and after melting, depositing and depositing lead in the microcavity formed after injection molding, extrusion molding, or processing the transparent plastic, selenium, cesium eye Adhesion or coating of phosphide, which converts Cesium Iodide or X-rays into visible light, and is sutured using a cover material having excellent X-ray transmittance such as carbon and acrylics. Provides a fixed grid to convert X-rays into visible light, providing a clean, bright diagnostic radiographic image with a digital radiation system Of providing the initial image, and is aimed to provide a grid which is to minimize the radiation dose exposed to the patient when taking X-rays.

1 is a block diagram of a manufacturing process of the non-scattering grid according to the present invention.

2 is a perspective view showing the overall shape of the present invention.

3 is a cross-sectional view showing the internal components of the present invention broken.

4 is a schematic diagram of a digital radiation system.

※ Explanation of symbols about main part of drawing ※

1. Body 2. Intermediate (intermediate) 3. Lead (thin film)

4. Fluorescent material 5. Top cover material 6. Bottom cover material

7. Glue 8. Frame

The non-scattering grid 1 applied to the digital radiation system according to the present invention for achieving the above object is Kapton, Ultem et al., Which is a transparent plastic material of a polymer system having excellent X-ray transmittance. Heat-resistant plastic is a step of constituting the interspacer (2) and the polymer-based transparent plastic is heated to be close to its melting point and injected, extruded or processed using a mold processed into fine grooves to form a microspace. To form and shape the sample in an electric oven at a certain temperature for a certain time to relieve surface stress and to melt the fine (alloy) (3) having a temperature range of 123 ℃ ~ less than 160 ℃ in a vacuum state to fine processing 2 stages to stabilize lead (3) expansion state by filling the filled groove and leaving the sample to be filled for a certain time at a certain temperature. And after polishing the surface filled with lead (3) deposited as described above to mill the sample to meet the required specifications of the product and selenium (vacuum impregnation, electro-deposition, chemical electrodeposition, electroplating and epoxy bonding method) Phosphor (4), which converts X-rays such as Selenium and Cesium Iodide into visible light, is bonded or applied by heating an appropriate amount of heat to the bottom of the two-stage process for a certain time. The cover material 5 having excellent X-ray transmittance, such as 3 steps and carbons and acrylics, is placed on the top of the 3 step process, and the acrylic cover material 6 of plastic type having excellent transmittance of visible light is lowered. In order to create the beauty of the appearance and to increase the robustness, the four steps of attaching the frame 8 to the external appearance of the four-step process to create and enhance the robustness, respectively. Characterized in that eojineun.

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

1 is a block diagram of a manufacturing process of a non-scattering grid according to the present invention, Figure 2 is a perspective view showing the overall shape of the present invention, as shown in the drawing, the present invention is a polymer system excellent in X-ray transmittance (Polymer) system Interspacer (2) consisting of Kapton, Ultem, and other heat-resistant plastics, and a polymer grooved by heating a polymer-based transparent plastic and processing into a microgroove. Lead (alloy) (3) to be filled and phosphors such as selenium and cesium iodide that are heated and bonded to the bottom of the process to convert X-rays into visible light (4) and the carbon and acrylic upper cover material (5) having excellent X-ray transmittance, which is adhered to the upper and lower ends of the workpiece with a non-conductive adhesive (7), respectively, and visible light Of which the permeability is composed of wonderful box and the frame (8) which is attached to the exterior in order to increase the adhesive force with the superior and plastic-based covering material (6) at the bottom of the acrylic main body (1) with its features.

The non-scattering grid applied to the digital radiation system according to the present invention configured as described above is a detector cell that is likely to occur during the process of processing the initial image data received by the detector used in the digital radiation system. It is effective to improve the initial image data by the interference phenomenon and scattered radiation transmission between the cells. For this purpose, the cell strip is applied by using a semiconductor cutting process instead of the conventional stacking method. It will be preferable to configure by aligning in units of micron according to.

Figure 3 is a cross-sectional view showing the internal components of the present invention broken, Figure 4 is a schematic diagram of a digital radiation system, as shown in the present invention is a polymer-based injection or extrusion molding using a mold machined into a fine groove It is composed of resin and lead (3) filled inside the fine groove and fluorescent material (4) attached to the bottom of the product. It is composed of acryl, carbon and X-ray permeable cover material (5). The resin is melted into a mold which is processed into fine grooves because its heating temperature is close to its melting point, and is molded in the form of injection molding or injection molding. The molded sample is left in the electric oven at a certain temperature for a predetermined time. When relieving stress and melting lead (alloy) 3 having a temperature range of about 123 ℃ to less than 160 ℃ in a vacuum state and filling it into a finely processed groove Highly charged sample is allowed to stand at a certain temperature for a certain time to stabilize lead (3) expansion state, polish the filled surface, and then mill the sample to meet the required specifications of the product, chemical electrodeposition, electroplating and epoxy By attaching a fluorescent material (4) to the bottom of the product by a method such as adhesion and the like to heat a suitable amount of heat for a certain time.

In sealing the resultant, the upper plate 5 is applied with materials such as acrylic and carbon having good X-ray transmittance, and the lower plate 6 is applied with plastic-based acrylic having excellent transmittance of visible light and a non-conductive adhesive (7). Suture or glue the product by using to fasten the frame (8) to the outside for the beauty of the appearance to complete the product.

By implementing in this way, it is a non-scattering grid dedicated to digital radiography, not a conventional non-scattering grid method for X-ray film, and it is possible to obtain a clear radiographic image with low dose of radiation, and most of all, to convert X-ray into visible light (light). Because it has a shape that makes it possible to reduce the reflectance of X-rays during X-ray transmission and remove scattered radiation at the same time, it is possible to realize the optimal image when digital radiography.

The present invention can significantly improve the density nonuniformity, the decrease of the contrast, and the increase of the exposure amount, which were considered the main problems in the existing non-scattering grid, and shorten the process of applying the fluorescent material for the digital image processing in the digital radiation system. It is to reduce the manufacturing cost of the detector of the digital radiation system and to provide the optimal initial image in terms of image processing, and to optimize the construction and commercialization of the digital radiation imaging system.

As described above, the present invention has been described in detail only with respect to the described embodiments, but it will be apparent to those skilled in the art that various modifications and changes are possible within the technical scope of the present invention, and such modifications and modifications belong to the appended claims. Is a matter of course.

Claims (3)

In a grid used in a digital radiation system; A step of forming an interspacer made of Kapton, Ultem, and other heat-resistant plastic, which is a transparent plastic material of a polymer system having excellent X-ray transmittance; The polymer-based transparent plastic is heated to be close to its melting point, and is injected or extruded using a mold processed into fine grooves or processed to form a microcavity, and the formed sample is formed at a predetermined temperature in an electric oven at a predetermined time. The surface stress is relieved and the lead (alloy) having a temperature range of less than 123 ℃ ~ 160 ℃ is melted in a vacuum state and filled into the finely processed groove, and the charged sample is allowed to stand for a predetermined time at a predetermined temperature. Stabilizing the expanded state; After polishing the surface filled with lead as deposited above, the sample is milled to meet the required specifications of the product, and X-rays such as selenium and cesium iodide are visible by means of epoxy bonding. A three step of heating or adhering a fluorescent substance (Phosphor), which serves to convert the heat, to a lower end of the two-step process by heating an appropriate amount of heat for a predetermined time; Sealing and bonding of a cover material having excellent X-ray transmittance such as carbon and acrylics to the upper part of the three-step process, and sealing the plastic acrylic having excellent transmittance of visible light with the non-conductive adhesive at the bottom, respectively. 4 steps; Beautifulness of appearance Four steps of manufacturing a non-scattering grid applied to a digital radiation system, characterized in that consisting of five steps of mounting the frame on the exterior of the workpiece in order to increase the robustness. In a grid used in a digital radiation system; An interspacer composed of Kapton, Ultem, and other heat-resistant plastic, which is a transparent plastic material of a polymer system having excellent X-ray transmittance; Lead (alloy) filled in the fine grooves formed by using a mold processed by heating a polymer-based transparent plastic and processed into fine grooves; Phosphors such as selenium and cesium iodide, which are heated and adhered to the bottom of the process to convert X-rays into visible light; An upper cover member of carbon and acrylic resins having excellent X-ray transmittance, which is adhered to the upper and lower ends of the workpiece with a non-conductive adhesive, respectively, and a lower cover member of plastic-based acrylic having excellent transmittance of visible light; Non-scattering grid applied to a digital radiation system, characterized in that consisting of a frame that is mounted on the exterior in order to increase the adhesion with the beauty of the body. The method of claim 1; Non-scattering applied to the digital radiation system characterized in that the vacuum impregnation, electro-deposition, chemical electrodeposition, electro-electroplating methods can be used for the adhesion of the fluorescent material, the upper cover material and the lower cover material to the main body. Grid manufacturing method