KR20100091011A - X-ray detector and x-ray imaging apparatus having the same - Google Patents

Abstract

PURPOSE: An x-ray detecting apparatus and an x-ray imaging apparatus including the same are provided to enhance the efficiency and the convenience of the operation and the diagnosis of a patient by providing the detailed, accurate and partially-magnified image of a main part along with the entire image of a target. CONSTITUTION: An x-ray detecting apparatus(100) comprises a photo conversion unit(220), a lens unit and a photo sensor(240). The photo conversion unit converts and emits the x-ray transmitted a target(P) into visible ray. The lens unit condenses the visible ray converted through the photo conversion unit and could control the magnification. The photo sensor detects the visible ray condensed through the lens unit. The lens unit comprises a plurality of lens which have different magnifications. In order that the visible ray converted through the photo conversion unit is input to the photo sensor through any one of the lenses, any one of the lenses are selectively arranged with the photo sensor.

Description

X-ray detector and X-ray imaging apparatus including the same {X-ray Detector and X-ray Imaging Apparatus having the same}

The present invention relates to an X-ray detector and an X-ray imaging apparatus including the same, and more particularly, an X-ray detector capable of providing a high-quality image capable of scaling the image and preventing resolution loss and distortion, and X-ray imaging including the same Relates to a device.

Since X-Ray was invented by Roentgen in 1897, medical institutions have been using X-ray radiography as a basic tool for diagnosis. In particular, the technology is evolving, focusing on high resolution and low radiation doses for patient safety and disease prevention.

X-ray imaging equipment, the oldest type of medical diagnostic equipment, uses X-ray perspective imaging to obtain real-time video for general X-ray imaging, CT, bone density measurement, and surgery. Or fluoroscopy systems.

The most commonly used X-ray apparatus, which has been used in hospitals for over 100 years, is to realize an analog image in which the distribution of X-ray dose in the two-dimensional space of the film is displayed in black and white according to the amount of photosensitivity. As a result, both the doctor and the patient have eased the treatment and treatment process, and X-rays have contributed greatly to the development of modern medicine by reducing misdiagnosis with quantitative data (film).

Nevertheless, the existing X-ray imaging system also has a number of problems such as an analog signal, the risk of radiation exposure to the body, the chemical emission due to the film phenomenon, and the development time required to read a single film.

Recently, as digitalization of information is rapidly progressing, digital radiography has emerged as a new technology to solve these disadvantages. This is because a higher resolution image can be obtained while irradiating less harmful X-rays than the conventional body.

The digital X-ray photographing apparatus is a digital next-generation product that enables an image to be displayed on a computer monitor instead of using a film in general analog X-ray. In other words, X-rays are irradiated to the X-ray detector, which is not an analog method of shooting X-rays on a film, and is converted into an electrical signal to obtain an image.

This is the biggest difference between the digital X-ray imaging apparatus and the conventional analog X-ray imaging apparatus, and it is also the most important core technology in the digital X-ray imaging apparatus.

The digital X-ray photographing apparatus includes a method using a film scanner, a computer radiography (CR) using an image plate and a reader, a method using a fluorescent plate and a CCD camera, an image multiplier and a CCD camera according to a method of detecting X-rays. The method used is largely classified into a method using a flat panel semiconductor detector made of TFT material and the like. Among them, the X-ray detection apparatus using an image multiplier and a CCD camera and a digital X-ray imaging apparatus having a TFT flat panel type semiconductor X-ray detecting apparatus are mainstream.

However, the X-ray detection apparatus using the image multiplier and the CCD camera has a disadvantage in that the output image is distorted due to the image distortion caused by the lens and the S-shaped distortion caused by the geomagnetism. In addition, the X-ray detecting apparatus using the image multiplier and the CCD camera has a mechanical limitation in configuring the actual system because of its bulky and heavy weight.

In addition, the TFT flat panel type semiconductor X-ray detecting apparatus has a smaller volume and weight than the X-ray detecting apparatus using the image multiplier and the CCD camera, and thus has a small mechanical limit. It is 3 ~ 4 times expensive, so it is expensive to apply to an actual X-ray imaging device, and it is impossible to scale without loss of resolution, and pixel bining or 4 (2 * 2 bining) or 9 ( Because 3 * 3 bining) is bundled and operated like a single pixel, the number of pixels is significantly reduced and the resolution of the image is drastically deteriorated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object thereof is to provide an X-ray detector capable of adjusting magnification when an image of a subject is acquired, and an X-ray imaging apparatus having the same, and more particularly, to a subject. The present invention provides an X-ray detector and an X-ray photographing apparatus including the same, as well as an equal magnification image, which can obtain an optically scaled partially enlarged image to provide a detailed and accurate image.

Another object of the present invention is to provide an X-ray detector capable of providing a high quality image without resolution loss and distortion in real time and an X-ray imaging apparatus including the same.

Still another object of the present invention is to provide an X-ray detector and an X-ray imaging apparatus including the same, which can provide detailed and accurate images to improve the efficiency and convenience of the procedure and diagnosis.

Still another object of the present invention is to provide an X-ray detector and an X-ray photographing apparatus including the same, which can reduce cost and improve price competitiveness and marketability.

In order to achieve the above object, the present invention comprises: a light conversion unit for converting the X-rays transmitted through the subject into visible light to emit; A lens unit for condensing visible light converted through the light conversion unit and adjusting magnification; And it provides an X-ray detector comprising an optical sensor for detecting the visible light collected through the lens unit.

The lens unit comprises a plurality of lenses having different magnifications; The positions of the lenses may be adjusted such that the visible light converted through the light conversion unit is incident to the optical sensor through any one of the plurality of lenses.

The plurality of lenses includes a first lens unit having a preset magnification and a second lens unit having a higher magnification than the first lens unit for providing an enlarged image; The lenses may be rotated by a rotary unit of a rotary type such that any one of the plurality of lenses is selectively positioned in the visible light path between the light conversion unit and the light sensor.

The plurality of lenses includes a first lens unit having a preset magnification and a second lens unit having a higher magnification than the first lens unit for providing an enlarged image; The optical sensor may be linearly moved by a reciprocating reciprocating unit so that any one of the plurality of lenses is selectively aligned with the optical sensor.

The first lens unit may be an equal magnification lens for acquiring an image having the same magnification as the subject, and the second lens unit may be an magnification lens having a magnification higher than that of the equal magnification lens.

Unlike the above, the lens unit may be configured to include a zoom lens capable of adjusting the magnification. And the optical sensor is preferably configured to include an EMCCD (Electron Multiplying Charge Coupled device).

The X-ray detector may further include a reflection mirror provided between the light conversion unit and the lens unit to reflect the visible light emitted from the light conversion unit to the lens unit to convert an optical path.

In another aspect, the present invention provides an X-ray detector having the above-described configuration; And an X-ray generator configured to generate the X-rays emitted toward the subject.

According to the X-ray detector and the X-ray imaging apparatus including the same according to the present invention has the following effects.

First, according to the present invention, since it is possible to obtain an image of a subject at a low magnification or a high magnification, there is an advantage that a detailed image can be provided at a high magnification with respect to a certain portion of the subject. In more detail, the present invention can photograph a magnified optically adjusted magnified image as well as an equal magnification image of a subject, thereby providing a variety of detailed and accurate images.

Second, according to the present invention, there is an advantage that can provide a high quality image in real time without resolution loss and distortion.

Third, according to the present invention, the detailed and accurate image, in particular, the overall image of the subject together with the detailed and accurate partial enlarged image of the main part has the advantage of improving the efficiency and convenience of the procedure and diagnosis of the patient.

Fourth, according to the present invention, since the cost is relatively low compared to the TFT flat panel type semiconductor X-ray detector and the X-ray photographing apparatus including the same, there is an advantage in that the price competitiveness and productability of the product can be improved.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention that can specifically realize the above object will be described. In the description of the present embodiment, the same names and symbols are used for the same components, and additional descriptions and redundant descriptions thereof will be omitted below.

1 is a schematic view showing an X-ray detector and an X-ray imaging apparatus including the same according to the present invention, FIG. 2 is a perspective view schematically showing a first embodiment of the X-ray detector of FIG. 1, and FIG. 2 is a side view, and FIG. 4 is a diagram illustrating an equal magnification image and a partially enlarged image acquired through the first embodiment of the X-ray detector of FIG. 2, and FIG. 5 schematically shows a second embodiment of the X-ray detector according to the present invention. 6 is a diagram illustrating an equal magnification image and a partial enlarged image acquired through the X-ray detector of FIG. 5.

First, referring to FIG. 1, an X-ray detector and an X-ray imaging apparatus including the same according to the present invention will be described.

As shown in FIG. 1, the X-ray imaging apparatus according to the exemplary embodiment of the present invention includes an X-ray generator 100 and an X-ray detector 200 that greatly generate X-rays. Here, the X-ray generator 100 is an apparatus for generating X-rays emitted toward the subject P.

In addition, the X-ray detector 200 is generally located on the opposite side of the X-ray generator 100 with respect to the subject P, and on the subject P through X-rays passing through the subject P. It is a device for acquiring an image, such as a photographic image or a moving image.

In more detail, as shown in FIGS. 1 to 3, the X-ray detector 200 includes a light conversion unit 220, a lens unit 230 and an optical sensor 240 that can adjust magnification. do. The light conversion unit and the lens unit are provided in the housing 210 forming the exterior of the X-ray detector.

In the present embodiment, the housing 210 forms the exterior of the X-ray detector 200, and the light conversion unit 220 is provided on the opposite side of the X-ray generator, and the lens unit 230 is provided inside the housing. And various components for acquiring a perspective image, ie, an image, on the subject P through X-rays transmitted through the subject P such as the optical sensor 240.

The light conversion unit 220 converts the X-rays transmitted through the subject P into visible light and emits the light. That is, the optical conversion unit 220 converts the X-rays transmitted through the subject P into visible light detectable by the optical sensor 240 so that the optical sensor 240 may implement an image. do.

In this case, the light conversion unit 220 may be composed of a scintillator or a scintillator. The scintillator is a kind of conversion layer in which X-rays penetrating the subject P are converted into visible light and then emitted, and are halogenated compounds such as cesium cesium iodide (CsI) or gadolinium sulfate (GOS). In some cases, a high-luminance fluorescent substance composed of an oxide compound such as) is used. In general, the scintillator is formed in the same manner on a circuit board on which a plurality of photoelectric conversion elements are formed by vapor deposition such as vacuum deposition, sputtering, and CVD at high density.

The X-ray detector 200 according to the present invention is provided between the light conversion unit 220 and the lens unit 230 to guide the visible light emitted from the light conversion unit 220 to the lens unit 230. It may be configured to further include a reflection mirror 250 for converting the optical path.

Of course, the lens unit 230 is disposed in the path of visible light emitted from the light conversion unit 220 and substantially straight, and the visible light emitted from the light conversion unit 220 is directly transferred to the lens unit 230. Although it may be transmitted, the visible light emitted from the light conversion unit 220 is reflected to the lens unit 230 through the reflection mirror 250 to minimize or prevent loss of light transmission to the lens unit 230. It can transmit visible light smoothly. In addition, the X-ray detector 200 according to the first exemplary embodiment of the present invention may include the reflective mirror 250 so that the optical path of visible light through the reflective mirror 250 may be variously changed. ) And the degree of freedom of design of the optical sensor 240 can be improved and the volume or size of the housing can be minimized.

The lens unit 230 emits visible light emitted from the light conversion unit 220, that is, substantially visible light emitted from the light conversion unit 220 and reflected by the reflection mirror 250. 240) to condense.

Herein, the lens unit 230 may include a plurality of lenses 231 and 232 having different magnifications, and the visible light emitted from the light conversion unit 220 may detect any one of the lenses. It selectively passes through and enters the optical sensor.

The plurality of lenses may include a first lens unit 231 having a predetermined magnification and a second lens unit 232 having a higher magnification than the first lens unit. In addition, any one of the lenses is selectively connected to the optical sensor 240 such that the visible light converted through the optical conversion unit 220 is incident to the optical sensor 240 through any one of the plurality of lenses. Aligned. For example, the optical sensor 240 is provided at a fixed position, and the magnification of the image obtained by the optical sensor 240 is changed by adjusting the positions of the lenses.

That is, any one of the lenses is aligned on the optical path of the visible light traveling from the optical conversion unit 220 to the optical sensor 240, so that the light according to the magnification of the specific lens aligned on the optical path The magnification of the image detected by the sensor 240 can be determined. In more detail, when the first lens unit 231 is aligned on the optical path of visible light traveling from the light conversion unit 220 to the optical sensor 240, the magnification of the first lens unit 231 is increased. When the image of the subject is imaged by the optical sensor, and the second lens unit 232 is aligned on the optical path, the image of the subject according to the magnification of the second lens unit 232 is displayed in the optical sensor. Is imaged on.

The positions of the lenses are adjusted such that any one of the lenses is aligned with the optical path between the reflective mirror 250 and the optical sensor 240. In this embodiment, the first lens unit 231 Is an equal magnification lens that focuses the visible light reflected by the reflection mirror 250 at the same magnification as that of the object P, and the second lens unit 232 is a magnification lens having a higher magnification than the equal magnification lens. It consists of.

Therefore, when the second lens unit 232 is aligned on the optical path, an enlarged image of a portion of the object P is captured by the optical sensor 240. In other words, the second lens unit 232 may acquire an enlarged image of a narrower area than the first lens unit 231.

On the other hand, the X-ray detector 200 is configured to adjust the position of the lenses by rotating the lens 231, 232 by a rotary unit of the rotary (rotary) method. In other words, the first lens unit 231 or the second lens unit 232 is rotationally driven by the rotation unit, so that when the first lens unit 231 is aligned on the optical path, When the reduced image is obtained by the X-ray detector according to the present invention, and the second lens unit 232 is aligned on the optical path, a high magnification image is obtained by the X-ray detector according to the present invention.

That is, by selectively positioning the first lens unit 231 or the second lens unit 232 on the light receiving unit 240a of the optical sensor 240 through the rotating unit, the optical sensor 240. May detect an image having the same magnification as that of the subject P or detect an image having a magnification larger than that of the subject P.

More specifically, as shown in FIGS. 2 and 3, the rotating unit is provided between the reflective mirror 250 and the optical sensor 240 and the first lens unit 231 and the second lens unit. 232 may be configured as a rotating plate 233 is installed.

In addition, the rotation plate 233 may be provided with a rotation shaft 234 at the center thereof, and a rotation driving means such as a step motor (not shown) may be connected to the rotation shaft 234.

Therefore, the rotation plate 233 is rotated by the rotation of the step motor to selectively select the first lens unit 231 or the second lens unit 232 on the light receiving unit 240a of the optical sensor 240. The optical sensor 240 may detect an image having the same magnification as that of the subject P or selectively detect an image having a magnification larger than that of the subject P.

That is, as shown in FIG. 4, when the first lens unit 231 is positioned on the light receiving unit 240a of the optical sensor 240 through the rotation unit, the magnification is the same as that of the subject P. The image P200 may be acquired, and the subject P is photographed when the second lens unit 232 is positioned on the light receiving unit 240a of the optical sensor 240 through the rotation unit. The partially enlarged image I210 having a magnification larger than that of the image may be acquired.

In the present invention, the term equal magnification image is not limited to the fact that an image having the same size as that of the subject is output to the display screen, but is not limited to that of the subject obtained by the first lens unit having the lowest magnification. The concept of saying an image.

The second lens unit 232 is condensed through the second lens unit 232 because the second lens unit 232 is provided at the same position as the first lens unit 231 in the radial direction from the rotation shaft 234 of the rotating unit. The partial enlarged image I210 detected by the optical sensor 240 is implemented as an enlarged image of a portion I200a of the equal magnification image I200, for example, a central portion of the subject.

In this case, when the second lens unit 232 is provided to have a position different from the first lens unit 231 in the radial direction from the rotation axis 234 of the rotary unit, the second lens unit 232 The partial enlarged image collected through the light sensor 240 may be implemented as an enlarged image of a portion of the portion other than the central portion of the equal magnification image I200.

Accordingly, according to the X-ray detector and the X-ray imaging apparatus including the same, the partial enlarged image (I210) can be obtained together with the equal magnification image (I200), thereby improving the efficiency of the procedure and diagnosis.

The optical sensor 240 applied to the X-ray detector according to the present invention detects the subject P information included in visible light and converts it into an electrical image signal, thereby realizing an image on the subject P. A component such as a sensor, and in the present embodiment, a charge coupled device (CCD), which is a kind of image sensor, is disclosed.

In particular, the optical sensor 240 according to the present invention is preferably composed of an Electromagnetic Multiplying Charge Coupled Device (EMCD). The EMCCD has a characteristic of excluding noise light included in visible light and amplifying photo light. Therefore, according to the X-ray photographing apparatus including the X-ray detector 200 according to the present invention, while the amount of X-rays irradiated from the X-ray generator 100 to the subject P is reduced, the optical sensor ( In operation 240, smooth and clear image detection may be performed, and X-rays may be applied to the subject P to minimize harmful points generated in the subject P.

On the other hand, as shown in Figure 5, the X-ray detector according to the present invention is one of the lenses, for example, the first lens unit 331 in the reciprocating manner of the optical sensor 340 instead of the rotating unit It may be configured to linearly move by the reciprocating unit to align with the second lens unit 332.

That is, the first lens unit 331 and the second lens unit 332 are provided in a fixed position, and the optical sensor 340 by the reciprocating unit to the first lens unit 331 or the By selectively positioning on the second lens unit 332, a high magnification partial magnification image or a low magnification image may be obtained. For example, the optical sensor 340 may detect an image having the same magnification as that of the subject P or detect a partial image having a magnification larger than that of the subject P.

More specifically, as described above, the first lens unit 331 condenses visible light converted through the light conversion unit 320 at the same magnification as that of the object P, and the second lens unit Reference numeral 332 condenses the visible light converted through the light conversion unit 320 at a magnification larger than that of the object P, and the first lens unit 331 uses the same visible light as the incident light. The second lens unit 332 may be configured as an enlarged lens that emits visible light incident at a magnification higher than that of the equal lens. Here, the first lens unit 331 and the second lens unit 332 may be installed so that the position is fixed by the fixed plate 333.

The reciprocating unit may include a fixed shaft 347 having an axial direction along the installation direction of the first lens unit 331 and the second lens unit 332, and the optical sensor 340. The fixed shaft 347 may be configured to include a reciprocating movement unit 345 provided to enable reciprocating movement. In this case, the reciprocating unit 345 may be made of a kind of circuit board that can be reciprocated on the fixed shaft 347 and the optical sensor 340 can be electrically mounted.

In addition, although not shown in detail, various driving means may be applied to reciprocate the reciprocating member 345. For example, a rack is formed on one side of the reciprocating member 345 and a pinion corresponding to the rack gear is provided on the outer side of the reciprocating member 345 so that the reciprocating member may be rotated by forward and reverse rotation of the pinion. 345 may be reciprocated, and the reciprocating unit 345 may be reciprocated through various driving means such as a drive transmission device using a belt and a motor and an actuator using electromagnetic force or hydraulic pressure.

Therefore, as the optical sensor 240 is selectively positioned on the first lens unit 331 or the second lens unit 332 through the reciprocating movement unit, the optical sensor 240 may prevent the blood from being photographed. An image having the same magnification as that on the sample P may be detected, or an image having a magnification larger than that on the subject P may be selectively detected.

That is, as shown in FIG. 6, when the optical sensor 340 is photographed while being positioned on the first lens unit 331 through the reciprocating movement unit, an equal magnification image having the same magnification as that on the subject P is taken. (I300) can be obtained, and when the optical sensor 340 is positioned on the second lens unit 332 and photographed through the reciprocating movement unit, the magnification magnified larger than that on the subject P is partly taken. The enlarged image I310 may also be acquired.

Here, the first lens unit 331 is installed so that the optical center axis is approximately coincident with the center of the light conversion unit 320, and thus is condensed through the first lens unit 331 is the optical sensor 340 The equal magnification image I300 detected at) becomes an image corresponding to the image of the subject P.

The second lens unit 332 is installed to be spaced apart from the first lens unit 331 along the axial direction of the fixed shaft 347 of the reciprocating unit, and accordingly the second lens unit 332 The partial magnified image I310 collected through the light sensor 340 is implemented as an enlarged image of a portion I300a of the equal magnification image I300, that is, an eccentric portion of the central portion.

In this case, the partial enlarged image I310 is for a portion eccentrically oriented in the equal magnification image I300 based on the central portion of the equal magnification image I300 according to the installation position of the second lens unit 332. It can also be implemented as a partially enlarged image. That is, when the second lens unit 332 is installed on the side close to the light conversion unit 320 along the axial direction of the fixed shaft 347 of the reciprocating movement unit in the lower portion of the equal magnification image (I300). An enlarged image may be acquired, and when installed far from the light conversion unit 320, an enlarged image of an upper portion of the equal magnification image I300 may be obtained.

Of course, by changing the reciprocating movement direction of the optical sensor 340 by the structure change of the second lens unit 332 and the reciprocating unit is collected by the second lens unit 332 and the optical sensor 340 The enlarged partial image detected by the reference) may be implemented as an enlarged image of the left and right portions based on the central portion of the equal magnification image I300 by the first lens unit 331.

The equal magnification image I300 and the partial magnified image I310 obtained as described above may be separately output separately and simultaneously or sequentially displayed on the display screen as necessary. Accordingly, a partial enlarged image (I310) of the whole image or a part of the subject may be acquired, thereby improving efficiency in the procedure and diagnosis.

7 is a perspective view schematically illustrating a third embodiment of the X-ray detector of FIG. 1. The X-ray detector according to the present embodiment applies a zoom lens as a lens unit.

That is, the lens unit 430 of the X-ray detector according to the present exemplary embodiment includes a zoom lens configured to focus at the same magnification or enlarged magnification as the subject image by selectively adjusting the focal length, and in addition, the light conversion unit 420 and an optical sensor 440 is the same as the first embodiment, so a detailed description thereof will be omitted. Of course, the X-ray detector according to the present embodiment may also be configured to further include a reflecting mirror 450, as in the first embodiment, the reflection mirror 450 is also the same as the first embodiment, so a detailed description thereof Will be omitted.

The zoom lens applied to the lens unit 430 of the present embodiment is a lens that can continuously change the focal length without changing the focal point or the aperture value, and a plurality of lenses are provided so that the focal length can be varied with one lens barrel. It is constructed and designed as a set.

Therefore, according to the present exemplary embodiment, the magnification of the zoom lens is selectively adjusted to allow the optical sensor 440 to detect an image having the same magnification as the image on the subject or to detect an image having a magnification larger than the image on the subject. You can do that. That is, in this embodiment, the magnification of the zoom lens is selectively adjusted to change the area and the enlargement / reduction ratio of the image acquired by the optical sensor 440.

As described above, the preferred embodiments of the present invention have been described, and the fact that the present invention can be embodied in other specific forms in addition to the above-described embodiments without departing from the spirit or scope thereof has ordinary skill in the art. It is obvious to them.

Therefore, the above-described embodiments are to be considered as illustrative and not restrictive, and thus, the invention is not limited to the above description, but may vary within the scope of the appended claims and their equivalents.

1 is a configuration diagram schematically showing an X-ray detector and an X-ray imaging apparatus including the same according to the present invention.

FIG. 2 is a perspective view schematically showing a first embodiment of the X-ray detector of FIG. 1.

3 is a side view of FIG. 2.

4 is a diagram illustrating an equal magnification image and a partial enlarged image acquired through the first embodiment of the X-ray detector of FIG. 2.

5 is a perspective view schematically showing a second embodiment of the X-ray detector according to the present invention.

FIG. 6 is a diagram illustrating an equal magnification image and a partial enlarged image acquired through the X-ray detector of FIG. 5.

7 is a perspective view schematically illustrating a third embodiment of the X-ray detector of FIG. 1.

Explanation of the main symbols in the drawings

100: X-ray generator 200: X-ray detector

210: housing 220: light conversion unit

230: lens unit 240: light sensor

250: reflection mirror P: subject

I200: equal magnification image I210: partially enlarged image

Claims (9)

A light conversion unit converting the X-rays transmitted through the subject into visible light and emitting the visible light; A lens unit for condensing visible light converted through the light conversion unit and adjusting magnification; And X-ray detector comprising an optical sensor for detecting the visible light collected through the lens unit. The method of claim 1, The lens unit comprises a plurality of lenses having different magnifications; X-ray detector, characterized in that any one of the lenses are selectively aligned with the optical sensor so that the visible light converted through the optical conversion unit is incident to the optical sensor through any one of the plurality of lenses. The method of claim 2, The plurality of lenses includes a first lens unit having a preset magnification and a second lens unit having a higher magnification than the first lens unit for providing an enlarged image; The X-ray detector of the plurality of lenses are selectively moved by the rotary unit of the rotary (rotary) so that any one of the plurality of lenses selectively located in the visible light path between the light conversion unit and the light sensor. . The method of claim 2, The plurality of lenses includes a first lens unit having a preset magnification and a second lens unit having a higher magnification than the first lens unit for providing an enlarged image; And the optical sensor is linearly moved by a reciprocating reciprocating unit so that any one of the plurality of lenses is selectively aligned with the optical sensor. The method according to any one of claims 2 to 4, And the first lens unit is an equal magnification lens for acquiring an image having the same magnification as the subject, and the second lens unit is an magnification lens having a magnification higher than that of the equal magnification lens. The method of claim 1, The lens unit, the X-ray detector, characterized in that it comprises a zoom lens capable of adjusting the magnification. The method of claim 1, The optical sensor is an X-ray detector, characterized in that comprises an EMCCD (Electron Multiplying Charge Coupled device). The method of claim 1, And a reflection mirror provided between the light conversion unit and the lens unit to reflect visible light emitted from the light conversion unit to the lens unit to convert an optical path. The X-ray detector of any one of claims 1 to 4 and 6 to 8; And an X-ray generator configured to generate the X-rays emitted toward the subject.

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