KR101382735B1 - X-ray ct system of high resolution and method for acquiring 3d images using the same - Google Patents

Abstract

The present invention provides an industrial high-resolution mobile x-ray ct system comprising: an X-ray generation part separately arranged from one side of an object and radiating short-wavelength X-rays to the object at various angles through a linear motion and a rotary motion; an X-ray detection part separately arranged from the other side of the object and acquiring high-resolution 2-dimensional X-ray images at the various angles through a linear motion and a rotary motion so as to detect the short-wavelength X-rays penetrating the object from the X-ray generation part at the various angles; a control part for controlling the linear and rotary motions of the X-ray generation part and the detection part to adjust the X-ray generation part and the X-ray detection part to response to each other; and a 3-dimensional image processing part for processing the high-resolution 2-dimensional X-ray images detected by the detection part to a CT image using image conversion, mirror, and interpolation processing methods, and the defects of the object to a 3-dimensional image using the CT image. The present invention can obtain the safety of industrial facilities and materials through the precise 3-dimensional detection and analysis of the defects by 3-dimensionally detecting the defects embedded in the facilities and the materials in industrial fields at high speed. [Reference numerals] (AA) Moving direction of an X-ray detection part; (BB) Short-wavelength X-rays; (CC) Moving direction of an X-ray generation part

Description

X-ray CT System of High Resolution and Method for Acquiring 3D Images Using The Same}

The present invention relates to an industrial high-resolution mobile X-ray CT system and a three-dimensional image acquisition method using the same, and more particularly, industrial high-resolution for precise three-dimensional detection of defects inherent in various facilities and materials in the industrial field Mobile X-ray CT system and a three-dimensional image acquisition method using the same.

Inspections using portable radiation equipment have been attempted to detect defects in various facilities and materials at industrial sites.

However, in the case of inspection using a portable device, only two-dimensional detection of defects is performed, and three-dimensional detection of defects is impossible.

The development of mobile CT equipment capable of three-dimensional detection has been mainly conducted in the medical field, and it has been manufactured with closed O-ring structure for rotating X-ray source and detector like the existing CT equipment.

Such mobile CT equipment requires a large space for CT imaging and has a weapon to freely inspect the facilities and components of industrial sites.

In addition, defects contained in the interior of industrial facilities and materials can cause stress concentrations and cause destruction and breakage of the facilities and materials themselves, which can result in huge losses in human, economic and industrial.

In addition, two-dimensional planar detection of defects has difficulty in determining the exact shape of the defects themselves, and it is also difficult to accurately determine the effect of defects on the facility and the material itself.

Therefore, it is urgent to establish a precise three-dimensional three-dimensional detection technology for defects that can play a significant role in ensuring safety for the field structures.

Korean Patent Publication: 10-2012-0008293 (Published 2012. 01. 30)

Korean Publication Patent: 10-2009-0025927 (published March 11, 2009)

SUMMARY OF THE INVENTION The present invention has been made to solve the conventional problems,

An object of the present invention is to shoot an object from multiple angles and convert it into a three-dimensional image, so that the precise three-dimensional detection and analysis of the defects inherent in the object to ensure the safety of the industrial high-resolution mobile X-ray To provide a CT system and a three-dimensional image acquisition method using the same.

Industrial high-resolution mobile X-ray CT system of the present invention provided to achieve the above object is disposed spaced apart on one side of the object, X to irradiate the short-wavelength X-ray to the object at various angles in a linear motion and rotational motion A line generator; High-resolution two-dimensional X-rays of various angles are disposed on the other side of the object by performing linear motion and rotational motion to detect short wavelength X-rays radiated from the X-ray generating unit at various angles and transmitted through the object. An X-ray detector for acquiring an image; A controller for controlling the X-ray generator and the X-ray detector to correspond to each other by controlling the linear motion and the rotational motion of the X-ray generator and the detector; And constructing a CT image by applying image transformation, mirroring, and interpolation techniques to the high-resolution two-dimensional X-ray image detected by the X-ray detector, and constructing a defect of the object into a three-dimensional shape by using the CT image. It comprises a; three-dimensional image building unit.

Here, the X-ray generator is characterized in that the X-ray source portion for generating a short wavelength X-ray, and the X-ray source portion is characterized in that it comprises a transfer unit for linear movement and rotational movement.

In addition, the front surface of the X-ray source portion is characterized in that the Kα thin film filter for filtering only the short-wavelength Kα X-rays among the X-rays of various wavelengths.

In addition, the X-ray source portion is characterized by consisting of an X-ray tube for protecting the X-ray source, and a shield for controlling the traveling direction of the X-ray by covering the outside of the X-ray tube.

Here, it is preferable that the X-ray tube is replaceably coupled to the shield, and the shield is preferably made of an X-ray absorbing material.

The conveying unit is installed in the longitudinal direction of the support is coupled to the vertical support and the vertical movable stand and the vertical movable stand is installed vertically on one side of the object, the front portion of the support is vertical to the support is adjustable width It is composed of a guide part, a rotary mover coupled to the guide to perform a linear movement and the rotational movement of the X-ray source, the rotary mover is coupled to the guide to move the roller, and the X-ray minority And a driving part connected to the central axis of the roller and the central axis of the coupling part to drive the roller and the coupling part.

The X-ray detector is characterized by consisting of a detector for detecting the short-wavelength X-ray transmitted through the object, and a transfer unit for linear and rotational movement of the detector.

Here, the transfer unit is coupled to the vertical support and the vertical movable support and the vertical movable support is installed vertically on the other side of the object, the front portion of the support is installed so as to be perpendicular to the support and the width adjustment in the longitudinal direction of the support A guide part to be installed and a rotary mover coupled to the guide part to linearly move and rotate the detector, the rotary mover coupled to the guide part to move the roller, and a coupling part to support the detector; And a driving part connected to the central axis of the roller and the central axis of the coupling part to drive the roller and the coupling part.

The 3D image constructing unit corrects a 2D X-ray image detected by applying image transformation, mirroring, and interpolation, and applies a CT image reconstruction technique to the image corrected by the image correction unit. It comprises a high-resolution CT image acquisition unit for obtaining a, and an image processing unit for constructing a three-dimensional image of the defect of the object by applying a three-dimensional shape reconstruction method to the high-resolution CT image.

In this case, the image conversion is characterized by converting the image of different size obtained from different directions by enlarging and reducing the image to an image of uniform size.

And, the mirroring is characterized in that to obtain the opposite image with respect to the acquired image angle.

In addition, the interpolation is characterized in that to obtain an X-ray image for a plurality of rotation angles using the actually obtained X-ray image.

In addition, the 2D X-ray image obtained by applying the image transformation, mirroring, and interpolation may be reconstructed a high resolution CT image by applying the OSME technique.

The numerical calculation of the image such as image conversion, mirroring, interpolation, CT image reconstruction, 3D shape reconstruction, etc. is characterized by using a high-speed parallel calculation method using a GPU.

According to the industrial high-resolution mobile X-ray CT system of the present invention and a three-dimensional image acquisition method using the same, the three-dimensional detection of defects in the facilities and materials at high speed in the industrial field enables accurate three-dimensional detection of defects There is an effect to ensure the safety of industrial facilities and materials through detection and analysis.

1 is a view for explaining the principle of operation of the industrial high-resolution mobile X-ray CT system according to an embodiment of the present invention.
2 is a diagram showing the configuration of an industrial high-resolution mobile X-ray CT system according to an embodiment of the present invention.
3 is an exploded view illustrating an X-ray generator in an industrial high-resolution mobile X-ray CT system according to an embodiment of the present invention.
Figure 4 is an exploded view showing the X-detector in an industrial high-resolution mobile X-ray CT system according to an embodiment of the present invention.
5 is a view showing an example in which the industrial high-resolution mobile X-ray CT system according to an embodiment of the present invention is used in a horizontal form according to the shape of the object
6 (a) and 6 (b) show characteristics of a Kα thin film filter inducing short wavelength X-rays.
7 (a) and 7 (b) show high resolution X-ray images using short wavelength X-rays.
8 illustrates various image conversion techniques using two-dimensional X-ray images.
9 is a diagram illustrating an image conversion technique for converting images of different sizes acquired from various directions into images of uniform sizes.
10 (a) and 10 (b) are diagrams illustrating a mirroring technique for obtaining opposite images with respect to image angles obtained from various directions.
Figure 11 is equipped with the A1 specimen for verification of the application of the image interpolation method of the present invention, and the 7 ° rotated using the two-dimensional X-ray images of the 1 ° rotated direction and 13 ° rotated direction of the A1 specimen A diagram showing comparison data between an interpolated image and an actual image in a direction.
12 is a diagram showing the results of a CT image reconstructed after applying the OSEM technique using a two-dimensional X-ray image of an A1 specimen.
FIG. 13 is a diagram illustrating a result of comparing an improved CT image result and an actual two-dimensional X-ray image after applying the image interpolation technique of the present invention. FIG.
Figure 14 (a) is a view showing the prepared A1 specimen, (b) is a view showing a three-dimensional shape reconstructed using the acquired CT image.
FIG. 15 is a comparison of CPU and GPU computation time during Fourier transform using two-dimensional image and its inverse transform; FIG.
16 is a flow chart illustrating a three-dimensional image acquisition method using an industrial high-resolution mobile X-ray CT system of the present invention.

These and other objects, features and other advantages of the present invention will become more apparent by describing in detail preferred embodiments of the present invention with reference to the accompanying drawings. Hereinafter, an industrial high resolution mobile X-ray CT system will be described in detail with reference to the accompanying drawings. For purposes of this specification, like reference numerals in the drawings denote like elements unless otherwise indicated.

1 is a view for explaining the principle of operation of the industrial high-resolution mobile X-ray CT system according to an embodiment of the present invention, Figure 2 is a configuration of an industrial high-resolution mobile X-ray CT system according to an embodiment of the present invention 3 is an exploded view illustrating an X-ray generator in an industrial high resolution mobile X-ray CT system according to an embodiment of the present invention, and FIG. 4 is an industrial view according to an embodiment of the present invention. FIG. 5 is an exploded view illustrating an X-ray detector in a high-resolution mobile X-ray CT system, and FIG. 5 is an industrial high-resolution mobile X-ray CT system according to an embodiment of the present invention used in a horizontal form according to an object's shape. An example is shown. In addition, Figure 6 (a) is a view showing before and after the use of the Kα thin film filter, Figure 6 (b) is a view showing the structure and characteristics of the Kα thin film filter for various X-ray targets, 7 is a diagram illustrating a high-resolution X-ray image using short wavelength X-rays.

As shown in FIGS. 1 to 7, the industrial high resolution mobile X-ray CT system of the present invention includes an X-ray generator 100, an X-ray detector 200, a controller 300, and a 3D image constructing unit ( 400).

As shown in FIG. 1, the X-ray generating unit 100 generates X-rays and transmits them to the object 10, and the X-ray detection unit 200 transmits X-rays passing through the object 10. It is for detecting the object is arranged with a predetermined interval on both sides around the object (10). The X-ray generating unit 100 performs short-wavelength X-rays at various angles of the object 10 by performing linear and rotational movements, and the X-ray detecting unit 200 performs linear and rotational movements at various angles. The concept of detecting two-dimensional X-ray image by detecting transmitted short-wavelength X-ray, and constructing the detected image into high-resolution CT image to perform precise three-dimensional detection and analysis of defects inherent in the object 10. Has a principle.

As shown in FIGS. 2 and 3, the X-ray generator 100 is provided with a Kα thin film filter 111 in front of the X-ray source to generate a short-wavelength X-ray 110. And, the X-ray source portion 110 is composed of a transfer unit 120 for linear and rotational movement.

The X-ray source unit 110 includes an X-ray tube 112 that protects the X-ray source, and a shield 113 that covers the outer side of the X-ray tube 112 to control the traveling direction of the X-rays. ) And the X-ray tube 112 is coupled within the shield 113 to allow replacement. Here, the shield 113 is made of a rectangular or circular hollow shape that can limit the traveling direction of the X-ray source installed therein. In addition, it is formed of an X-ray absorbing material such as lead to minimize the X-ray coating of the worker. That is, the work space of the worker is secured by blocking the progress of the X-ray behind the X-ray source.

 The transfer unit 120 is a support 121 is vertically erected on one side of the object, a vertical movable plate 122 is vertically installed on the front portion of the support 121, the support 121 in the vertical movable plate 122 Guide portion 123 is installed in the longitudinal direction of the combined. In addition, the rotating member 124 coupled to the X-ray source unit 110 is coupled to the guide part 123, and the rotating member 124 linearly moves along the guide part 123 and at the same time X-rays. Rotate the source unit 110. Here, the rotary mover 124 is coupled to the guide rollers 125, the coupling portion 126 for supporting the X-ray minority portion 110, the central axis and coupling portion 126 of the roller 125 It is composed of a drive unit 127 is connected to the central axis of the drive the roller 125 and the coupling portion 126.

As shown in FIGS. 2 and 4, the X-ray detection unit 200 includes a detector 210 for detecting short wavelength X-rays passing through the object 10, and a transfer unit for linearly rotating and rotating the detector 210. It consists of 220.

The detector 210 detects short-wavelength X-rays that are irradiated at various angles from the X-ray generating unit 100 and passes through an object to obtain a high resolution two-dimensional X-ray image. The detector 210 is preferably a flat panel detector capable of acquiring an X-ray image, and preferably has a high resolution of 2.5 LP / mm or more at 80% MTF.

The transfer unit 220 is a support 221 is vertically erected on the other side of the object 10, a vertical movable table 222 is vertically installed on the front surface of the support 221, the support on the vertical movable table 222 Guide portion 223 is installed in the longitudinal direction of the 221 is coupled. In addition, the guide part 223 is coupled to the rotary mover 224 coupled with the detector 210 to perform a linear motion along the guide part 223 and at the same time rotate the detector 210. Here, the rotating body 224 is a roller 225 coupled to the guide portion 223 is moved, the coupling portion 226 for supporting the detector 210, the central axis and coupling portion 226 of the roller 225 It is composed of a drive unit 227 is connected to the central axis of the drive the roller 225 and the coupling portion 226.

As shown in FIG. 5, the X-ray generator 100 and the X-ray detector 200 may be used in a horizontal form according to the size and shape of the object 10.

The controller 300 controls the driving units 127 and 227 of the X-ray generator 100 and the X-ray detector 200, respectively, so that the X-ray source unit 110 and the detector 210 correspond to each other. The linear and rotational movements of the line generator 100 and the X-ray detector 200 are controlled.

Here, as shown in 6 (a), the Kα thin film filter 111 provided in front of the X-ray source catches only Kα X-rays having short wavelengths among X-rays of various wavelengths including continuous X-rays. That is, when the Kα thin film filter 111 is used, Kβ X-rays may be blocked and only the Kα X-rays may be transmitted, and short wavelength X-rays may be induced using the same.

In addition, as shown in FIG. 6 (b), the Kα thin film filter 111 varies depending on the material of the inspection target (target). If the target is Mo (molybdenum), the Kα thin film filter is Zr (zirconium), and the target is Cu (copper). If the Kα thin film filter is Ni (nickel), and if the target is Co (cobalt), the Kα thin film filter is Fe (iron); if the target is Fe (iron), the Kα thin film filter is Mn (manganese), and the target is Cr (chrome) As the Kα thin film filter, V (vanadium) may be used. The transmittance of the Kα thin film filter 111 used for each target is as shown in Fig. 6 (b), and the numerical value of "I (Kα) permeation / I (Kα) incidence" is the transmittance of the Kα thin film filter 111. Indicates.

In addition, Figure 7 (a) is a high-definition X-ray image of a grasshopper photographed by a short wavelength X-ray source, Figure 7 (b) is a high-definition X-ray image of a fish photographed by a short wavelength X-ray source to be. As shown, when using a short wavelength X-ray, it is possible to obtain an image with higher definition than a simple X-ray.

The 3D image constructing unit 400 includes an image corrector 410 for correcting the 2D X-ray image detected by applying image transformation, mirroring, and interpolation, and CT on the image corrected by the image corrector 410. A high resolution CT image acquisition unit 420 for obtaining a high resolution image by applying an image reconstruction method, and an image processing unit 430 for constructing a 3D image of defects of an object by applying a 3D shape reconstruction method to the high resolution CT image. It consists of

FIG. 8 is a diagram illustrating various image conversion techniques using two-dimensional X-ray images, and FIG. 9 is a diagram illustrating an image conversion technique for converting images of different sizes acquired from various directions into images of uniform size. 10 (a) and 10 (b) show a mirroring technique for obtaining opposite images for image angles obtained from various directions, and FIG. 11 illustrates A1 for verifying the application of the image interpolation technique of the present invention. Comparing data between an actual image and an interpolated image in a 7 ° rotated direction, including specimens and calculated using two-dimensional X-ray images in a 1 ° rotated and 13 ° rotated direction of the A1 specimen. .

In the image corrector 410, as illustrated in FIG. 8, two-dimensional X-ray images acquired by the X-ray detector 200 are acquired by a general CT apparatus through image processing techniques such as size change, rotation, and projection. The image is converted into the same image as the X-ray image. The converted 2D X-ray images are used for CT image reconstruction.

In addition, as shown in FIG. 9, an image transformation is performed to enlarge and reduce the two-dimensional X-ray image. When the X-ray generator 100 and the X-ray detector 200 rotate and linearly acquire a two-dimensional X-ray image, the object 10, the X-ray generator 100, and the X-ray detector Since the distance of 200 continuously changes, the size of the acquired image may vary. Therefore, it is necessary to convert images of different sizes acquired in each direction into images of uniform size. In this case, it is preferable to use a bilinear or bicubic technique, which is a representative technique for enlarging and reducing a 2D image, for the conversion of uniform size X-ray images.

In addition, as shown in FIG. 10, a mirroring technique for obtaining the opposite image with respect to the angle of the 2D X-ray image obtained in various directions is applied.

In general, the CT image rotates the X-ray generating unit and the X-ray detecting unit 360 ° around the object as shown in FIG. 10 (a), and according to the structure complexity of the object, a large number of two-dimensional X-ray images Acquisition is obtained after the mathematical image data calculation process.

However, when using the mobile X-ray CT system of the present invention, due to the linear motion of the X-ray generator 100 and the X-ray detector 200, the two-dimensional X-ray at an angle of about 300 ° to 60 ° Since a line image is acquired, a two-dimensional X-ray image for an angle between 120 ° and 240 ° corresponding to the image acquisition angle is implemented through a new mirroring technique.

In FIG. 10 (b), an X-ray image taken at 10 ° with respect to pig hog was formed by simply mirroring the MS Power Point to form an X-ray image at an opposite angle (190 °). This was compared with the actual X-ray image taken at 190 °.

As a result of the comparison, there is only a slight difference in the magnitude of the image intensity despite the simple conversion, and the change in the intensity is relatively well coincided with both curves, thereby confirming the possibility of image acquisition through the mirroring technique. have.

In addition, X-ray images for a larger number of rotation angles can be calculated from X-ray images obtained through 2D X-ray image reduction, enlargement, and mirroring, and finally, accurate CT images can be obtained. Image interpolation techniques are applied.

FIG. 11 illustrates the fabrication of the A1 specimen for verification of the application of the image interpolation technique, and after obtaining a two-dimensional X-ray image of the direction rotated by 1 ° from the reference direction and the direction rotated by 13 ° using the fabricated A1 specimen. The two images can be used to calculate the interpolation image for the 7 ° rotation. In addition, as a result of comparing the X-ray image obtained in the 7 ° direction and the X-ray image obtained in the actual 7 ° rotated direction, the image obtained through the image interpolation method agrees well with the actual image. It can be seen that.

The CT image acquisition unit 420 is applied with an OSEM technique for acquiring a high resolution CT image using the interpolated image.

FIG. 12 illustrates the results of CT images calculated by OSEM using 120, 60, and 30 two-dimensional X-ray images obtained by rotating an A1 specimen through 360 °. As shown, when using 120 or 60 two-dimensional X-ray images, a high-resolution CT image can be calculated. However, when using 30 two-dimensional X-ray images, a very bad resolution CT image can be calculated. You can check it.

Fig. 13 shows the improved CT image results after applying the image interpolation technique. The high-resolution CT image (left) and 30 real 2D X-rays calculated using 30 interpolation images and real 2D X-ray images FIG. 8 shows the results of comparing CT images calculated using only images. That is, it can be seen that a high resolution CT image can be obtained using the image interpolation technique.

The image processor 430 constructs a defect of the object 10 into a 3D image by applying a 3D shape reconstruction technique to the high resolution CT image.

(A) of FIG. 14 is a manufactured A1 specimen, and (b) is a three-dimensional shape reconstructed using the acquired CT image.

As shown in (b) of FIG. 14, when the 3D shape is reconstructed using the high resolution CT image acquired for the facilities and materials of the site, 3D detection of defects in the field is possible.

A high-speed calculation process is required to perform numerical calculations on the images such as transformation, mirroring, interpolation, CT image reconstruction, and 3D shape reconstruction of the acquired 2D X-ray images.

FIG. 15 illustrates an example of a general image processing calculation using a GPU. In the case of a calculation using a CPU according to an increase in the number of pixels of an image through FIG. 15, a sudden time increase may occur. In the calculations used, it can be seen that the increase in time does not occur significantly. Therefore, numerical calculation for images such as image conversion, mirroring, interpolation, CT image reconstruction, 3D shape reconstruction, etc. of the present invention uses a high-speed parallel calculation method using a GPU.

16 is a flowchart illustrating a 3D image acquisition method using an industrial high resolution mobile X-ray CT system of the present invention.

As shown in FIG. 16, in the three-dimensional image acquisition method of the present invention, first, the X-ray generator 100 irradiates short-wavelength X-rays to various angles of the object 10 while performing a linear motion and a rotational motion. The X-ray detector 200 detects short-wavelength X-rays transmitted from various angles of the object while performing linear and rotational movements to obtain high-resolution two-dimensional X-ray images of various angles (step S10). In this case, the short wavelength X-rays irradiated to the object are provided with a Kα thin film filter 111 on the front surface of the X-ray generator 100, and thus, the short wavelength among various X-rays generated by the X-ray generator 100. Filter out only Kα X-rays.

In addition, the high-resolution two-dimensional X-ray images obtained by the X-ray detector 200 are rotated and linearly moved by the X-ray generator 100 and the X-ray detector 200 to generate a two-dimensional X-ray image. If obtained, since the distance between the object 10, the X-ray generator 100, and the X-ray detector 200 continuously changes, the size of the acquired image may vary.

Therefore, the obtained high-resolution two-dimensional X-ray image is enlarged and reduced to convert images of different sizes acquired in different directions into images of uniform size (S20). In this case, it is preferable to use a bilinear or bicubic technique, which is a representative technique for enlarging and reducing a 2D image, for the conversion of uniform size X-ray images.

In addition, by mirroring the image-converted two-dimensional X-ray image to obtain the opposite image for the image angle (S30). That is, because the linear movement of the X-ray generator 100 and the X-ray detector 200 acquires a two-dimensional X-ray image at an angle of about 300 ° to 60 °, Two-dimensional X-ray images of opposite angles between 120 ° and 240 ° are implemented using a new mirroring technique.

Subsequently, image interpolation is performed to acquire an X-ray image for a greater number of rotation angles by using the image transformation and the mirrored two-dimensional X-ray image (S40). Image interpolation is obtained by obtaining a two-dimensional X-ray image for 1 ° rotated direction and 13 ° rotated direction, and then using the two images to calculate an interpolated image for 7 ° rotated direction. Acquire an X-ray image of the angle.

The 2D X-ray image to which image interpolation is applied acquires a high resolution CT image by an OSME method (step S50).

The 3D shape reconstruction method is applied to the high resolution CT image to construct a defect of the object 10 into a 3D shape (step S60). In other words, when the 3D shape is reconstructed using the high resolution CT images acquired for the facilities and materials in the field, the 3D detection of defects in the field is possible.

On the other hand, a high-speed calculation process is required to perform numerical calculations on images such as transformation, mirroring, interpolation, CT image reconstruction, and 3D shape reconstruction of acquired 2D X-ray images. Therefore, it is preferable to use a high-speed parallel calculation method using a GPU for numerical calculation of images such as image conversion, mirroring, interpolation, CT image reconstruction, and three-dimensional shape reconstruction.

As described above, the present invention enables the three-dimensional detection of defects inherent in facilities and materials at high speed in an industrial site, thereby ensuring the safety of industrial facilities and materials through precise three-dimensional detection and analysis of defects. .

Although the preferred embodiments of the present invention have been described, the present invention is not limited to the specific embodiments described above. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the appended claims, And equivalents may be resorted to as falling within the scope of the invention.

100: X-ray generator 110: X-ray source
111: Kα thin film filter 112: X-ray tube
113: shield
120,220: transfer part 121,221: support
122,222: vertical movable table 123,223: guide part
124,224: rotatable body 125,225: roller
126,226: coupling portion 127,227: driving portion
200: X-ray detection unit 210: detector
300: control unit 400: 3D image construction unit
410: image correction unit 420: CT image acquisition unit
430: image processing unit
10: object

Claims (21)

An X-ray generating unit spaced apart from one side of the object and irradiating the short-wavelength X-rays to the object at various angles with linear and rotational movements;
High-resolution two-dimensional X-rays of various angles are disposed on the other side of the object by performing linear motion and rotational motion to detect short wavelength X-rays radiated from the X-ray generating unit at various angles and transmitted through the object. An X-ray detector for acquiring an image;
A controller for controlling the X-ray generator and the X-ray detector to correspond to each other by controlling linear and rotational movements of the X-ray generator and the X-ray detector; And
Converting the high-resolution two-dimensional X-ray image detected by the X-ray detector into an image of uniform size, mirroring the converted image to obtain an opposite image, and from the X-ray image obtained through the mirroring A three-dimensional image constructing unit for constructing a precise CT image through image interpolation for calculating X-ray images of a plurality of rotation angles, and constructing a defect of an object in a three-dimensional shape using the CT image;
Industrial high resolution mobile X-ray CT system comprising a. The method according to claim 1,
The X-ray generation unit is an industrial high-resolution mobile X-ray CT system, characterized in that consisting of the X-ray source unit for generating a short-wavelength X-ray, and the transfer unit for linear and rotational movement of the X-ray source unit. 3. The method of claim 2,
The high-resolution mobile X-ray CT system of the industrial, characterized in that the front of the X-ray source portion is provided with a Kα thin film filter that filters only the short-wavelength Kα X-rays among the X-rays of various wavelengths. 3. The method of claim 2,
The X-ray source unit is composed of an X-ray tube for protecting the X-ray source, and the high-resolution mobile X- industrial, characterized in that the shield covering the outside of the X-ray tube to control the direction of X-rays Line CT system. 5. The method of claim 4,
Wherein said X-ray tube is replaceably coupled to said shield. 5. The method of claim 4,
The shield is an industrial high resolution mobile X-ray CT system, characterized in that composed of X-ray absorbing material. 3. The method of claim 2,
The conveying unit is installed in the longitudinal direction of the support is coupled to the vertical support and the vertical movable stand and the vertical movable stand is installed vertically on one side of the object, the front portion of the support is vertical to the support is adjustable width The industrial high resolution mobile X-ray CT system, characterized in that composed of a guide portion, a rotary body coupled to the guide portion to perform a linear movement and the rotational movement of the X-ray source portion. The method of claim 7, wherein
The rotary mover is composed of a roller coupled to the moving guide portion, the coupling portion for supporting the X-ray minority portion, the drive unit is connected to the central axis of the roller and the central axis of the coupling portion to drive the roller and the coupling portion Industrial high resolution mobile X-ray CT system, characterized in that. The method according to claim 1,
The X-ray detection unit is a high-resolution mobile X-ray CT system, characterized in that the detector consists of a detector for detecting the short-wavelength X-ray transmitted through the object, and the linear and rotational movement of the detector. The method of claim 9,
The transfer unit is installed in the longitudinal direction of the support is coupled to the vertical support and the vertical movable support and the vertical movable support is installed vertically on the other side of the object, the front portion of the support to be perpendicular to the support is adjustable width A high resolution mobile X-ray CT system comprising a guide part and a rotating body coupled to the guide part to perform a linear motion and rotate the detector. 11. The method of claim 10,
The rotary mover is composed of a roller coupled to the moving guide portion, the coupling portion for supporting the detector, and a driving portion connected to the central axis of the roller and the central axis of the coupling portion to drive the roller and the coupling portion High resolution mobile X-ray CT system. The method according to claim 1,
The 3D image construction unit converts the high resolution 2D X-ray image detected by the X-ray detection unit into an image having a uniform size, obtains an opposite image by mirroring the converted image, and obtains the mirrored image. Image correction that is corrected through image interpolation that calculates X-ray images for multiple rotation angles from X-ray images, and high-resolution images are obtained by applying CT image reconstruction technique to the image modified by the image correction. And a high resolution CT image acquisition unit and an image processing unit for constructing a 3D image of a defect of an object by applying a 3D shape reconstruction method to the high resolution CT image. delete delete delete 13. The method of claim 12,
The CT image reconstruction is an industrial high resolution mobile X-ray CT system, characterized in that the OSME technique is applied to obtain a high-resolution CT image using the interpolated image. 13. The method of claim 12,
The high-resolution mobile X-ray CT system of claim 2, wherein the numerical calculation of the image such as image conversion, mirroring, interpolation, CT image reconstruction, 3D shape reconstruction, etc., uses a high-speed parallel calculation method using a GPU. Obtaining a high-resolution two-dimensional X-ray image of various angles by detecting short wavelength X-rays irradiated from various angles and passing through the object;
Converting the obtained 2D X-ray images into a uniform size image, mirroring the converted image to obtain an opposite image, and obtaining a plurality of rotation angles from the X-ray image obtained through the mirroring. Obtaining a high resolution CT image through image interpolation for calculating an X-ray image;
Reconstructing a 3D shape using the obtained high resolution CT images;
3D image acquisition method comprising a 19. The method of claim 18,
The short wavelength X-ray irradiated to the object is characterized by filtering only Kα X-rays of short wavelength among X-rays of various wavelengths generated by the X-ray generator by having a Kα thin film filter on the front surface of the X-ray generator. 3D image acquisition method. 19. The method of claim 18,
The acquiring of the high resolution CT image further includes applying an OSME technique to an X-ray image to which image interpolation is applied. 19. The method of claim 18,
3. The method of claim 3, wherein numerical calculation of the image, such as image conversion, mirroring, image interpolation, CT image acquisition, and 3D shape reconstruction, uses a high-speed parallel calculation method using a GPU.

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