KR20160048275A - X-ray photographing apparatus - Google Patents

Abstract

The present invention relates to an X-ray imaging device adjusting an irradiation range of a collimator unit without moving and transferring an X-ray source unit or an X-ray sensor unit so as to change and set an irradiation range during CT image photographing and an irradiation range during panoramic image photographing, thereby preventing deterioration of the X-ray sensor unit. To this end, the X-ray imaging device of the present invention comprises: an X-ray source unit; a collimator unit for adjusting an irradiation range of an X-ray irradiated from the X-ray source unit; and an X-ray sensor unit, having a sensing surface divided into a first obtainment surface and a second obtainment surface, for detecting the X-ray having passed through the collimator unit, wherein the collimator unit is adjusted such that the entire surface of the first obtainment surface and the second obtainment surface is irradiated with X-rays during CT image photographing, and at least a partial surface of the first obtainment surface during panoramic image photographing is irradiated with X-rays.

Description

[0001] X-RAY PHOTOGRAPHING APPARATUS [0002]

The present invention relates to an X-ray imaging apparatus, and more particularly, to an X-ray imaging apparatus that adjusts an irradiation range of a collimator unit without moving an X-ray source unit or an X- Ray imaging apparatus capable of preventing the deterioration of the X-ray sensor unit by changing and setting the irradiation range.

Generally, in the dentistry, an X-ray imaging apparatus capable of performing X-ray imaging is installed to treat teeth and various periodontal diseases, and to grasp the state of the teeth and alveolar bone for the purpose of correction of the dental heat.

An X-ray imaging apparatus used in a dentistry transmits a predetermined amount of X-rays to a part of a body part to be photographed, detects the intensity of the transmitted X-rays, converts it into an electric signal corresponding to the X- At this time, the computer acquires the image by obtaining the intensity of the X-ray of each point of the body imaging region and processing it.

As the above-described X-ray imaging apparatus, an X-ray imaging apparatus for CT (computerized tomography) capable of capturing a three-dimensional stereoscopic image and a panoramic X-ray imaging apparatus capable of imaging in two-dimensional plane are mainly used.

An X-ray imaging apparatus for CT is an imaging apparatus that displays a single-faced image of a body that can not be represented by a normal imaging. The X-ray is projected on a human body while rotating at a constant angle over 360 degrees. The transmitted X- And reconstructs the absorption value of the cross section of the human body to display the image.

In addition, the panoramic X-ray imaging apparatus is a device that can take a panoramic image so that the whole tooth condition and the jaw joint can be seen at a glance by taking an entire image in the circumferential direction around the X-ray generator.

Generally, in order to obtain a CT X-ray image and a panoramic X-ray image, a problem arises in that both the CT X-ray imaging apparatus equipped with the CT X-ray sensor and the panoramic X-ray imaging apparatus equipped with the panoramic X- .

In order to solve such a problem, a CT X-ray sensor or a panoramic X-ray sensor is interchangeably installed in one X-ray imaging apparatus, whereby an X-ray imaging apparatus Has been disclosed.

However, although there is an advantage that the 'X-ray imaging apparatus' can capture both the CT X-ray image and the panoramic X-ray image with one X-ray image acquiring apparatus, the CT for obtaining the CT X- It has been inconvenient to selectively mount the X-ray sensor and the panoramic X-ray sensor.

In order to solve the inconvenience described above, a dental CT X-ray image and a panoramic X-ray image are acquired using one X-ray image acquiring device, as disclosed in Japanese Laid-Open Patent Application No. 2010-0120810, A dental CT and a panoramic X-ray image acquiring device capable of selectively acquiring a CT X-ray image and a panoramic X-ray image using only the imaging device.

More specifically, the 'dental CT and panoramic X-ray image acquisition apparatus' may be configured to move the light source unit 110 as shown in FIG. 1 or to move the light source unit 110 as shown in FIG. 2 , And the X-ray sensor unit 120 must be moved.

However, in order to move the light source unit 110, a separate light source unit moving device for moving the light source unit 110 must be provided. In order to move the X-ray sensor unit 120, a separate X- And the apparatus for moving the light source unit or the apparatus for moving the X-ray sensor unit has a problem that the equipment is complicated, the manufacturing cost is increased, and the manufacturing period is long.

1 and 2, the 'dental CT and panoramic X-ray image acquisition device' uses the sensing surface of the X-ray sensor used in the CT X-ray imaging also in the panoramic X-ray imaging If CT X-ray imaging is performed after panoramic X-ray imaging, deterioration occurs on the sensing surface of the sensor used for panoramic X-ray imaging, thereby deteriorating the quality of the CT image.

Published Patent Publication No. 2010-0120810 (Published Date November 17, 2010)

It is an object of the present invention to solve the above problems in the prior art, and it is an object of the present invention to provide an X-ray source unit or X-ray sensor unit, Ray imaging apparatus capable of preventing the deterioration of the X-ray sensor unit by changing and setting the irradiation range.

According to an aspect of the present invention, there is provided an X-ray imaging apparatus including: an X-ray source unit; A collimator unit for adjusting an irradiation range of X-rays irradiated from the X-ray source unit; And an X-ray sensor unit for detecting an X-ray passing through the collimator unit, wherein the collimator unit is configured to detect X Line is irradiated and X-rays are irradiated on at least a part of the obtaining surface of any one of the plurality of obtaining surfaces when the panoramic image is taken.

Preferably, the plurality of acquisition planes are constituted by a first acquisition plane and a second acquisition plane, and X-rays are irradiated on at least a part of the first acquisition plane at the time of the panoramic imaging.

Preferably, the first obtaining surface is a surface on which a reference image serving as a reference for combining a combined image for generating a CT final image is obtained, and the second obtaining surface may be a surface on which the combined image is obtained .

Preferably, the area ratio of the first acquisition face to the second acquisition face may range from 1: 9 to 3: 7.

Preferably, the first obtaining surface and the second obtaining surface may be constituted by one sensor.

Preferably, the first obtaining surface and the second obtaining surface may each be composed of different sensors.

Preferably, the first acquiring surface and the second acquiring surface are both activated at the time of CT image capturing, and at the time of capturing a panoramic image, a part of the first acquiring surface irradiated with X-rays may be activated.

Preferably, a part of the surface activated during the panoramic imaging may be a different area for each panoramic imaging.

Preferably, some of the planes activated during the panoramic imaging may periodically be in different regions.

Preferably, some of the surfaces activated during the panoramic imaging are different from each other at a plurality of imaging time points for obtaining one panoramic image.

According to the present invention as described above, the irradiation range at the time of capturing a CT image and the irradiation range at the time of capturing a panoramic image are changed by adjusting the irradiation range of the collimator unit without moving the X-ray source unit or the X- There is an advantage that deterioration of the line sensor portion can be prevented.

In addition, since the conventional collimator unit configured to adjust the irradiation range is operated without mechanically driving the sensor unit and the light source unit, the range of investigation at the time of CT imaging and the range of examination at the time of panoramic imaging are changed, And the time required for assembling the apparatus can be shortened.

1 is a view showing a first embodiment for acquiring a panoramic X-ray image of a conventional dental CT and panoramic X-ray image acquisition apparatus.
2 is a view showing a second embodiment for acquiring a panoramic X-ray image of a conventional dental CT and panoramic X-ray image acquisition apparatus.
3 is a view for explaining a CT image acquisition and a panorama image acquisition of an X-ray imaging apparatus according to an embodiment of the present invention.
FIGS. 4 to 6 are diagrams illustrating a process of acquiring a panoramic X-ray image of the X-ray imaging apparatus according to an embodiment of the present invention.

The present invention may be embodied in many other forms without departing from its spirit or essential characteristics. Accordingly, the embodiments of the present invention are to be considered in all respects as merely illustrative and not restrictive.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms.

The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, .

On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

In the present application, the terms "comprises", "having", "having", and the like are intended to specify the presence of stated features, integers, steps, operations, components, Steps, operations, elements, components, or combinations of elements, numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like or corresponding elements are denoted by the same reference numerals, and a duplicate description thereof will be omitted.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 3 is a view for explaining the acquisition of a CT image and the acquisition of a panoramic image of the X-ray imaging apparatus according to an embodiment of the present invention, and FIGS. 4 to 6 illustrate a panoramic image X-ray images are acquired.

As shown in FIG. 3, the X-ray imaging apparatus according to an embodiment of the present invention includes an X-ray source unit 100, a collimator unit 200, and an X-ray sensor unit 300.

The X-ray source unit 100 and the X-ray sensor unit 300 are disposed on one side and the other side of a rotating unit (not shown), respectively. The CT unit 300 captures a CT image or a panorama image .

As described above, the CT imaging or the panoramic imaging during the rotation by the rotation means is the same as or similar to the conventional X-ray imaging apparatus, and a detailed description thereof will be omitted.

First, the source unit will be described.

The X-ray source unit 100 generates X-rays for X-ray imaging and irradiates X-rays toward the head 10 of the examinee, and generates X-rays inside the X-ray source unit 100 (Not shown) may be provided.

Next, the collimator unit 200 will be described.

The collimator part 200 is a part for adjusting the irradiation range of the X-ray irradiated from the X-ray source part 100, and the collimator part 200 is composed of a plurality of lead boards And the irradiation range of the X-ray can be adjusted by adjusting the size of the slit 200h by adjusting the positions of the plurality of the lead boards.

Next, the X-ray sensor unit 300 will be described.

The X-ray sensor unit 300 detects X-rays passing through the collimator unit 200 and includes a sensing surface 310 divided into a first acquisition surface 311 and a second acquisition surface 312 Respectively.

Specifically, the sensing surface 310 may be composed of one sensor or a plurality of sensors.

For example, when the sensing surface 310 is comprised of a single sensor, a portion of the sensor is used as the first acquisition surface 311 and the remaining area of the sensor is used as the second acquisition surface 312 Can be used.

Also, when the sensing surface 310 is comprised of a plurality of sensors, one sensor may be used to function as the first acquisition surface 311 and the other sensor may be used to function as the second acquisition surface 312 have.

3 to 6, the detailed configuration of the X-ray imaging apparatus including the X-ray source unit 100, the collimator unit 200, and the X-ray sensor unit 300, as described above, And operation will be described.

As shown in FIG. 3, the collimator unit 200, which adjusts the irradiation range of the X-rays irradiated from the X-ray source unit 100 to the X-ray sensor unit 300, ) Is adjusted so that X-rays are irradiated on the entire surface of the first obtaining surface 311 and the second obtaining surface 312, and at least a part of the first obtaining surface 311 X-rays are irradiated to the surface.

Here, the first obtaining surface 311 is a surface on which a reference image serving as a reference for combining a combined image for generating a CT final image is obtained, and the second obtaining surface 312 is a surface on which the combined image is obtained .

More specifically, the X-ray source unit 100 and the X-ray sensor unit 300 are rotated with respect to a predetermined rotation axis by a rotation unit (not shown) The first obtaining surface 311 and the second obtaining surface 312 are formed at a plurality of photographing time points (a plurality of angles) while the X-ray source unit 100 and the X- An X-ray is irradiated to the entire surface, a reference image is acquired on the first acquisition plane 311, and a combined image is acquired on the second acquisition plane 312.

That is, a plurality of plane image data in which the reference image and the combined image are combined on the entire sensing surface 310 are generated for each photographing time point.

A plurality of plane image data thus obtained are combined to obtain one CT final image. At this time, a reference image serving as a reference for combining a plurality of plane image data is captured on the first acquisition plane 311, The combined image generated by the image combined with the CT final image is captured on the second acquisition surface 312, and a CT final image in a three-dimensional shape can be generated as shown in FIG.

The area ratio of the first obtaining surface 311 to the second obtaining surface 312 is preferably in the range of 1: 9 to 3: 7 because the area of the first obtaining surface 311 is too large There is a problem in that an excessive calculation process for combining the combined images is required because the area of the reference image is small. If the area of the first acquisition surface 311 is too large, the efficiency of sensor utilization becomes poor.

On the other hand, at the time of CT image capturing, both the first acquisition plane 311 and the second acquisition plane 312 must be photographed, so that both the first acquisition plane 311 and the second acquisition plane 312 are activated , And a part of the first obtaining surface 311 to which the X-ray is irradiated is optically activated during panoramic imaging, thereby extending the service life of the sensor.

At this time, it is preferable that some of the surfaces activated during the panoramic imaging are configured to be different from each other at the time of taking a panoramic image, or may be configured to be periodically different from each other, thereby preventing a certain area from being continuously used.

In particular, as shown in FIGS. 4 to 6, some of the surfaces activated during the panoramic imaging are different from each other at a plurality of imaging time points for obtaining one panoramic image, It is possible to effectively prevent continuous use.

The present invention as described above is advantageous in that deterioration of the X-ray sensor unit 300 can be prevented. Specifically, after the panoramic photographing is performed on the first obtaining plane 311, the first obtaining plane 311 and the 2 acquisition plane 312, the final CT image is a panorama image, and a second acquisition plane 311 in which no degradation phenomenon is likely to occur is not used, And the quality of the final CT image can be improved because it is constituted by combining only the image of the acquiring surface 312.

Although the present invention has been described with reference to the preferred embodiments thereof with reference to the accompanying drawings, it will be apparent to those skilled in the art that many other obvious modifications can be made therein without departing from the scope of the invention. Accordingly, the scope of the present invention should be interpreted by the appended claims to cover many such variations.

100: X-ray source part
200: collimator part
300: X-ray sensor part
310: sensing surface
311: first obtaining surface
312: second acquisition face

Claims (10)

An X-ray source part;
A collimator unit for adjusting an irradiation range of X-rays irradiated from the X-ray source unit; And
And an X-ray sensor part having a sensing surface divided into a plurality of acquisition surfaces and detecting an X-ray passing through the collimator part,
Wherein the collimator unit is adjusted so that X-rays are irradiated on the plurality of acquired planes when capturing a CT image, and X-rays configured to irradiate at least a part of planes of one of the plurality of acquired planes, Shooting device. The method according to claim 1,
Wherein the plurality of acquisition planes are constituted by a first acquisition plane and a second acquisition plane, and X-rays are irradiated on at least a part of the first acquisition plane during the panoramic imaging. The method according to claim 1,
The first obtaining surface is a surface on which a reference image serving as a reference for combining a combined image for generating a CT final image is obtained,
And the second acquisition surface is a surface on which the combined image is acquired. The method of claim 3,
Wherein an area ratio of the first obtaining surface to the second obtaining surface is in a range of 1: 9 to 3: 7. 3. The method of claim 2,
Wherein the first obtaining surface and the second obtaining surface are constituted by one sensor. 3. The method of claim 2,
Wherein the first acquisition surface and the second acquisition surface are made of different sensors, respectively. 3. The method of claim 2,
Wherein the first acquiring surface and the second acquiring surface are both activated when a CT image is captured and a part of the first acquiring surface irradiated with X-rays is activated during panoramic imaging. 8. The method of claim 7,
Wherein a part of the surface activated during the panoramic imaging is a different area for each panoramic imaging. 8. The method of claim 7,
Wherein a part of the surface activated during the panoramic imaging is periodically arranged in another area. 8. The method of claim 7,
Wherein some of the surfaces activated during the panoramic imaging are different from each other at a plurality of imaging time points to obtain one panoramic image.

Images