KR101265006B1 - Radiography detecting equipment having optical fiber member - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiation detection apparatus having an optical fiber member, the radiation detection apparatus outputting an image signal from incident radiation, comprising: a scintillation screen for emitting visible light at a point where radiation is incident; An optical fiber member having the scintillator film coupled to one side and having optical paths communicating with one side and the other side, respectively; And an image sensor coupled to the other side of the optical fiber member to detect visible light transmitted through the optical paths. As a result, by forming a plurality of optical paths penetrating the optical fiber member and one side and the other side of the optical fiber member, the interference between the visible light, which is an analog signal transmitted to the image sensor, is eliminated and distortion is not generated in the analog signal for the original image. It is possible to provide a radiation detection apparatus having an optical fiber member capable of acquiring a high-resolution radiation detection image.

Description

Radiation detection device having an optical fiber member {RADIOGRAPHY DETECTING EQUIPMENT HAVING OPTICAL FIBER MEMBER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiation detection apparatus for detecting radiation such as X-rays, and more particularly, to a radiation detection apparatus having an optical fiber member capable of improving the homogeneity of an image for a large area detected by radiation and converting it into a digital signal. It is about.

The present invention relates to a radiation detection apparatus. As a background technology of the present invention, as disclosed in Korean Patent Laid-Open Publication No. 10-2008-0057170, a technique of acquiring an image image by fitting an image image to a camera or a small image sensor using a lens is generally used. have.

In particular, when the area of the subject is large, a lens of a large size corresponding thereto is necessary.

However, the conventional radiation (or X-ray) detecting apparatus reduces a large-area image by using a lens, and then obtains an image by allowing the reduced image to be formed on a small image sensor, thereby interfering with each other. There is a problem that it is difficult to obtain a high resolution image.

In addition, if a large size X-ray detection apparatus is to be manufactured, there is a problem in that the cost of production increases exponentially rather than a linear increase because a corresponding size lens must be processed.

In addition, there is a problem in that a detection device for a predetermined size or more cannot be manufactured due to the limitation of the processing technology for processing a large lens.

Accordingly, the present invention is to solve the problems according to the prior art, and to provide a radiation detection apparatus having an optical fiber member that can obtain a high-resolution image that does not cause interference or distortion between signals for the image For that purpose.

It is also an object of the present invention to provide a radiation detection apparatus having an optical fiber member capable of converting a large area image into a small area image regardless of the size of a subject through which radiation is transmitted.

It is also an object of the present invention to provide a radiation detection apparatus having an optical fiber member whose production cost is linearly increased in accordance with the required image size.

A radiation detection device having an optical fiber member for achieving the above object, the radiation detection device for outputting an image signal from the incident radiation, the scintillation screen for emitting visible light at the point where the radiation is incident And an optical fiber member having a flash film coupled to one side, and optical paths communicating one side and the other side, respectively; And an image sensor coupled to the other side of the optical fiber member to detect visible light transmitted through the optical paths.

In addition, one end and the other end of each of the optical path is characterized in that formed in each of the predetermined partition on one side and the other side of the optical fiber member.

In addition, an input surface is formed on one side of the optical fiber member, a part where one end of the optical paths are formed, and an output surface is formed on the other side of the optical fiber member, a part on which the other ends of the optical paths are formed, and the output surface is a reduced form of the input surface. It features.

In addition, a first pixel portion formed of pixels partitioning the input surface in a matrix form is formed on the input surface, and a second pixel portion in the form of a reduced shape of the first pixel portion is formed on the output surface, and the optical paths are each pixel of the first pixel portion. And two pixels formed at positions corresponding to each other among the pixels of the second pixel portion and the second pixel portion.

In addition, the optical paths are formed so as to be inclined symmetrically from the input surface to the output surface, respectively.

The apparatus may further include an A / D converter which receives the analog signal sensed by the image sensor and converts the analog signal into a digital signal.

The A / D converter may amplify the analog signal received from the image sensor and convert the analog signal into a digital signal.

In addition, the A / D conversion unit includes a photo multiplier tube (PMT) or an avalanche photo diode (APD), and uses an optical multiplier or avalanche photodiode to receive an analog signal received from an image sensor. It is characterized by amplifying.

The apparatus may further include a signal processor configured to store the digital signal converted by the A / D converter or to display the digital signal on the display.

In addition, a fiber optic plate is further provided between the other side of the optical fiber member and the image sensor, so that visible light that is bound to the other side of the optical fiber member is transmitted to the image sensor without interelectrode coupling. It is characterized by.

In addition, the optical fiber member is characterized in that the other side is formed to be reduced by a predetermined magnification with respect to one side.

In addition, the optical fiber member is characterized in that the tapered form inclined symmetrically from one side to the other side.

In addition, the radiation is characterized in that the X-rays (X-ray).

According to the radiation detection apparatus having the optical fiber member according to the present invention as described above, by forming a plurality of optical paths through the optical fiber member and one side and the other side of the optical fiber member, between the visible light which is an analog signal transmitted to the image sensor There is an effect that can obtain a high-resolution radiation detection image of eliminating interference to the distortion and no distortion of the analog signal for the original image.

In addition, by adjusting the magnification of the input surface and the output surface formed on one side and the other side of the optical fiber member by one end and the other end of each optical path, there is an effect that can convert a large area image into a small area image.

In addition, there is an effect that a radiation detection image can be obtained without using a lens by using the optical fiber member.

1 is a view of an X-ray (X-ray) detection apparatus that is the background of the present invention.
2 is a block diagram showing the configuration of a radiation detection apparatus having an optical fiber member according to a preferred embodiment of the present invention.
3 and 4 are perspective and front views showing the configuration of the optical fiber member.

Hereinafter, a radiation detection apparatus having an optical fiber member according to the present invention will be described in detail with reference to the accompanying drawings.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiation detection apparatus, and is an apparatus for outputting an original image by radiation, such as X-rays or gamma rays, that have passed through a subject as an accurate and high resolution digital signal.

In this case, the radiation used in the present invention may be used a variety of radiation that can pass through the subject and obtain an image image by the transmitted radiation, in the case of non-destructive testing X-rays and gamma rays are used, and the human body X-rays will mainly be used.

2 is a view showing the configuration of a radiation detection apparatus having an optical fiber member according to a preferred embodiment of the present invention.

As shown in FIG. 2, the radiation detection apparatus including the optical fiber member includes a scintillation screen 10, a fiber optic member 20, and an image sensor 30.

Hereinafter, each component will be described.

First, scintillation will be described. Scintillation refers to a case in which luminescence is a phenomenon in which a substance emits light under stimulation of radiation or an electric field.

The scintillation screen (Scintillation Screen, 10) is a plate that emits light, that is, visible light at the point where the radiation is incident when the radiation is incident in the form of a plate, and includes a fluorescent material that emits light in response to the stimulation of the radiation do.

At this time, the flash film 10 may be used a variety of flash film, it is preferable that a needle-like CsI (Tl) or Gadox is used.

The scintillation film using ScI (Tl) having the acicular structure is suitable for a radiation detection device for high resolution, and the scintillation film using Gadox is suitable for a relatively low cost radiation detection device compared to CsI (Tl).

The light film 10 may be fixed by being in close physical contact with one side of the optical fiber member 20 or by directly depositing on one surface of the optical fiber member 20.

At this time, since the flash film 11 of CsI (Tl) has a weak characteristic as a thin paper, the flash film 11 of CsI (Tl) is bonded to the MCP LII (Microchanell Plate Light Image Intensifir, 12) to CsI. (Tl) The flash film 11 is preferably formed. In this case, the flash film 10 includes the CsI (Tl) flash film 11 and the MCP LII 12 together. In this case, the CsI (Tl) flash film 11 may be coupled to the MCP LII 12 by a deposition method (see FIG. 4). At this time, CsI (Tl) may be replaced with ScI (Tl).

The optical fiber member 20 serves to transfer the light emitted from the scintillating film 10, that is, the visible light, to the image sensor 30 described later without loss.

That is, the optical fiber member 20 is coupled to the flash film 10 on one side to prevent the interference between visible light emitted from the visible light emitted from the flash film 10 and minimize the leakage and loss of the visible line And transmits to the other side of the optical fiber member 20 to which the image sensor 30 is coupled.

That is, visible light emitted from the flash film 10 is transmitted from one side of the optical fiber member 20 to the other side. More specifically, as will be described later, the visible light emitted from the scintillating film 10 is incident on one end of the optical paths 26 formed on one side of the optical fiber member 20 and the other side of the optical fiber member 20. It is transmitted to the image sensor 30 through the other end of the optical paths 26 formed in the.

In order to transmit visible light emitted from the flash film 10 attached to one side of the optical fiber member 20 to the other side of the optical fiber member 20 in which the image sensor 30 is disposed, the optical fiber member ( 20, a plurality of optical paths 26 are formed to communicate one side and the other side.

At this time, the optical paths 26 are formed to communicate with one side and the other side of the optical fiber member 20, respectively. That is, each of the optical paths 26 may be formed in the form of a hole communicating from one side of the optical fiber member 20 to the other side.

In this case, one end of each of the optical paths 26 are formed to be uniformly spaced apart from one side of the optical fiber member 20. In addition, the other end of each of the optical paths 26 are formed to be uniformly spaced apart from the other side of the optical fiber member 20. At this time, one end of each of the optical paths 26 of the one side of the optical fiber member 20 is the portion and the shape of the other end of each of the optical paths 26 of the other side of the optical fiber member 20 is formed Is preferably about the same and its width is formed to have a constant magnification.

That is, when radiation is incident on the three light film 10 coupled to one side of the optical fiber member 20 and visible light having an image is emitted, each point of the flash film 10 where the visible light is emitted. The visible light enters the optical path 26 through one end of the individual optical path 26 connected to each point, and the visible light entering the optical path 26 passes through the optical path 26 to the other part of the optical fiber member 20. The other end of each corresponding optical path 26 formed on the side is transmitted to the image sensor 30. Therefore, the visible rays emitted from the scintillating layer 10 are not subjected to interference between visible rays emitted from adjacent places, and are minimized from leakage or loss of the emitted visible rays and transmitted to the image sensor 30, thereby providing a high resolution image. Can be obtained.

An input surface that is a portion where one end of the optical paths 26 are formed on one side of the optical fiber member 20, and an output surface that is a portion where the other end of the optical paths 26 is formed on the other side of the optical fiber member 20. Is formed. That is, a portion where one end of each of the optical paths 26 is formed is an input surface, and a portion where the other end of each of the optical paths 26 is formed an output surface.

In this case, the output surface is formed in a shape substantially similar to the input surface, the width of the input surface is formed wider than the width of the output surface. That is, the output surface is formed in a reduced form of the input surface, so that an image of a large size that is emitted from the scintillating film 10 and enters the input surface is reduced to an image of a small size on the output surface so that the image sensor To be delivered to (30). In this case, the output surface is preferably reduced to a predetermined magnification of the input surface.

One end and the other end of each of the optical paths 26 may be formed to have a predetermined partition on one side and the other side of the optical fiber member 20, respectively. That is, it may be formed to be arranged in a matrix (Matrix) form.

3 is a perspective view illustrating the optical fiber member 20.

As shown in FIG. 3, the optical fiber member 20 is preferably formed in a tapered shape in which the optical fiber member 20 is inclined symmetrically from one side to the other side, but the optical fiber member 20 is not necessarily formed in a tapered shape. none. That is, as described above, as long as the output surface can be formed to be reduced in size by a predetermined magnification than the input surface, the shape of the optical fiber member 20 may be any shape.

The input surface is formed with a first pixel portion 24 composed of pixels 25 dividing the input surface in a matrix form, and the output surface has a reduced shape of the first pixel portion 24. The pixel portion may be formed.

In this case, the optical paths 16 are formed to communicate two pixels formed at positions corresponding to each other among the pixels 15 of the first pixel portion 14 and pixels of the second pixel portion, respectively.

In this case, as the number of pixels increases, the image degree may increase.

In addition, the optical paths 16 are preferably formed to be symmetrically inclined from the input surface to the output surface.

That is, the paths of the optical paths 16, that is, the paths connecting one end and the other end of each of the optical paths 16 formed on the input surface and the output surface may be formed in various forms, but are symmetrical from the input surface to the output surface. It is preferable to form a constant inclined to. That is, it is preferable that the optical paths 26 have a tapered shape as a whole.

The other side of the optical fiber member 20 is preferably formed to be reduced by a predetermined magnification with respect to one side.

In this case, the optical fiber member 20 may be formed in a tapered shape that is symmetrically inclined from one side to the other side.

That is, the diameter of the outer peripheral surface gradually decreases symmetrically from one side surface to the other side of the optical fiber member 20, and the taper portion 23, which is a portion where the diameter of the outer peripheral surface gradually decreases on the outer circumference of the optical fiber member 20, Is formed.

Therefore, the optical paths 26 are also symmetrically inclined from one side of the optical fiber member 20 to the other side, so that one ends of the optical paths 26 formed on one side of the optical fiber member 20 are uniform. The ratio is dense and the one side and the other side of the optical fiber member 20 is in communication.

That is, one side surface and the other side surface of the optical fiber member 20 are formed in a form corresponding to the work surface and the output surface, or one side and the other side surface of the optical fiber member 20 itself of the input surface and the output surface It can also play a role.

In this case, the distance between the optical paths 26 and the size between the optical paths 26 may be obtained when the optical fiber member 20 is cross-sectional processed in a direction parallel to one side or the other side of the optical fiber member 20. It is preferable to form the same for each cross section.

The flashing film 10 is coupled to be in close contact with one side of the optical fiber member 20.

When the radiation 1 is incident on the scintillating film 10 and the visible light is emitted at a specific point of the scintillating film 10, it is possible to minimize the leakage of the emitted visible light to the outside to minimize the high resolution. To print the image of.

As described above, the visible light emitted at a specific point of the flash film 10 is formed at the pixel 25 at a position corresponding to the specific point among the pixels 25 formed on one side of the optical fiber member 20. It enters the optical path 26 and is transmitted to the other side of the optical fiber member.

By the above configuration, the visible light is emitted at predetermined points where the radiation 1 is incident on the scintillating film 10, and through the optical path 26 formed at the corresponding position of each point where the visible light is emitted. Each emitted visible light is transmitted to the other side of the optical fiber member 20. At this time, the image by the visible rays transmitted from one side of the optical fiber member 20 to the other side, the original image by the radiation incident on the scintillating film 10 and the same image that changes only its magnification is transmitted.

That is, the analog signal of the large area image passing through one side of the optical fiber member 20 may be transmitted as the analog signal of the small area image to the other side of the optical fiber member 20.

The image sensor 30 is closely coupled to the other side of the optical fiber member 20.

The image sensor 30 detects visible light transmitted through the optical paths 16 from one side of the optical fiber member 20 to the other side as an analog signal.

That is, the image sensor 30 detects visible light transmitted to the other side of the optical fiber member 20 through the respective optical paths 26 so that radiation passes through the subject and is incident on the scintillating film 10. The original image will be detected as it is.

As the image sensor 30, a CMOS image sensor or a CDD image sensor may be used.

The CMOS image sensor is a low power imaging device having a complementary metal oxide semiconductor (CMOS) structure, and has a lower power consumption and a single power supply than a charge coupled device (CCD). It is an image sensor that can be used and can be integrated with peripheral circuits.

The CDD image sensor (CCD Image Sensor, Charge Coupled Device Image Sensor) is a sensor that converts light into electric charge to create an image (ie, an image). CCD is an abbreviation of Charge Coupled Device, and is a charge coupled device. CDD is a semiconductor device that can transmit a signal of a small number of carriers injected into a semiconductor as a lump of electric charge and transmit in parallel with the crystal surface by an external voltage.

At this time, a large number of photodiode elements are integrated in the CCD, and when light shines thereon, electrons are generated according to the amount of light, and an image (image) is generated according to the amount of electrons generated.

The radiation detection apparatus having the optical fiber member according to the present invention may further include an A / D converter 40.

The A / D converter 40 is connected to the image sensor 30 to convert an analog signal sensed by the image sensor 30 into a digital signal.

That is, the A / D converter 40 receives an analog signal for visible light sensed by the fraudulent image sensor 30 from the image sensor 30 and converts the analog signal into a digital signal.

The A / D converter 40 converts the original image incident to the scintillating film 10 by radiation through the subject into a digital signal, thereby more accurately and easily storing, transmitting, and You can output to the display.

In this case, the A / D converter 40 may include a photo multiplier tube (PMT) or an avalanche photo diode (APD).

The photo multiplier tube (PMT) or avalanche photo diode (APD) performs a function of amplifying an analog signal transmitted from the image sensor, thereby converting the amplified analog signal into a digital signal. It performs a function of converting high resolution image information into a digital signal.

The radiation detecting apparatus having the optical fiber member according to the present invention may further include a signal processor 60.

The signal processor 60 is connected to the A / D converter 40 to receive a digital signal converted by the A / D converter and store it in a database or display on a display screen. do. In this case, the signal processor 60 may serve to transmit the stored signal to another peripheral output device.

A fiber optic plate 50 may be further included between the other side of the optical fiber member 20 and the image sensor 30 (see FIG. 4).

That is, the optical fiber plate 50 is inserted and coupled to be in close contact with each other between one side of the optical fiber member 20 and the image sensor 30, the visible light is bound to the other side of the optical fiber member Allows transmission to the image sensor without interelectrode coupling.

The fiber optic plate 50 transmits visible light, which is an analog signal transmitted to the other side of the optical fiber member 20, to the image sensor 30 without interference or scattering, and to the original image. The high resolution analog signal is transmitted to the image sensor 30.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, I will understand. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.

1: radiation 10: scintillation film
20: optical fiber member 21: incident part
22: output part 23: taper part
24: pixel portion 25: pixel
26: optical path 30: image sensor
40: A / D change part 50: optical fiber plate
60: signal processing unit

Claims (13)

In the radiation detection device for outputting an image signal from the incident radiation,
A scintillation screen for emitting visible light at a point where radiation is incident;
An optical fiber member having the scintillator film coupled to one side and having optical paths communicating with one side and the other side, respectively; And
It is coupled to the other side of the optical fiber member includes an image sensor for detecting the visible light transmitted through the optical paths,
An input surface is formed on one side of the optical fiber member is a portion formed with one end of the optical path, an output surface is formed on the other side of the optical fiber member is a portion formed the other end of the optical path, the output surface of the input surface Is a reduced form,
The input surface is formed with a first pixel portion composed of pixels partitioning the input surface in a matrix form, and the output surface is formed with a second pixel portion in a reduced form of the first pixel portion. It is formed to communicate two pixels formed at a position corresponding to each other of the pixels of the first pixel portion and the pixels of the second pixel portion, each of the optical paths are formed in the form of a hole communicating from one side of the optical fiber member to the other side Become,
A fiber optic plate is further provided between the other side of the optical fiber member and the image sensor to transmit visible light bound to the other side of the optical fiber member to the image sensor without interelectrode coupling. And a radiation detection device having an optical fiber member.
The method of claim 1,
One end and the other end of each of the optical paths is a radiation detection device having an optical fiber member, characterized in that formed in each of the predetermined partition on one side and the other side.
delete delete The method of claim 1,
And the optical paths are symmetrically inclined from the input surface to the output surface, respectively.
The method of claim 1,
And an A / D converter configured to receive an analog signal sensed by the image sensor and convert the analog signal into a digital signal.
The method according to claim 6,
And the A / D converter amplifies the analog signal received from the image sensor and converts the analog signal into a digital signal.
The method of claim 7, wherein
The A / D converter includes a photo multiplier tube (PMT) or an avalanche photo diode (APD),
And a fiber optic member, amplifying the analog signal received from the image sensor using the optical multiplier or avalanche photodiode.
The method according to claim 6,
And a signal processing unit for storing the digital signal converted by the A / D converter or displaying the digital signal on the display.
delete The method according to any one of claims 1, 2, 5, 6, 7, 7, 8 or 9,
The optical fiber member,
Radiation detection device having an optical fiber member, wherein the other side is formed to be reduced by a predetermined magnification with respect to one side.
The method of claim 11,
The optical fiber member is a radiation detection device having an optical fiber member, characterized in that the tapered form inclined symmetrically from one side to the other side.
The method according to any one of claims 1, 2, 5, 6, 7, 7, 8 or 9,
And said radiation is X-rays.

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