WO2016064072A1

WO2016064072A1 - X-ray imaging device

Info

Publication number: WO2016064072A1
Application number: PCT/KR2015/007855
Authority: WO
Inventors: 박무용; 우재희
Original assignee: 오스템임플란트 주식회사
Priority date: 2014-10-23
Filing date: 2015-07-28
Publication date: 2016-04-28
Also published as: KR20160048275A

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 to be irradiated in the X-ray source unit; and an X-ray sensor unit having a sensing surface divided into a first acquisition surface and a second acquisition surface, and detecting the X-ray having passed through the collimator unit, wherein the collimator unit is adjusted such that the whole surface of the first acquisition surface and the second acquisition surface is irradiated with X-rays during CT image photographing, and is configured such that at least a partial surface of the first acquisition surface during panoramic image photographing is irradiated with X-rays.

Description

X-ray equipment

The present invention relates to an X-ray imaging apparatus, and more particularly, to adjust the irradiation range of the collimator unit without moving the X-ray source unit or the X-ray sensor unit to adjust the irradiation range at the time of CT imaging and panorama image shooting. The present invention relates to an X-ray photographing apparatus capable of changing the irradiation range to prevent deterioration of the X-ray sensor unit.

In general, the dentist is provided with an X-ray imaging apparatus capable of performing X-ray imaging to determine the condition of the teeth and alveolar bone for the purpose of treating teeth and various periodontal diseases or the correction of orthodontics.

The X-ray imaging apparatus used in dentistry transmits a certain amount of X-rays to a tooth portion, which is a body part to be photographed, senses the intensity of the transmitted X-rays, converts it into an electrical signal corresponding to the X-ray intensity, and then sends it to a computer. In this case, the computer obtains an image by processing the X-ray intensity of each point of the body imaging region and processing it.

As the X-ray imaging apparatus described above, X-ray imaging apparatuses for CT (Computerized Tomography) capable of capturing three-dimensional stereoscopic images, and X-ray imaging apparatuses for panoramas capable of capturing two-dimensional planes are mainly used.

CT X-ray imaging apparatus is an imaging device that shows a tomographic plane of the body that cannot be represented by normal photography. The X-ray imaging apparatus rotates X-rays at a constant angle over 360 degrees and projects the transmitted X-rays to a human body. It is a tomography device that collects through and reconstructs the absorbed values of the cross section of the human body.

In addition, the panoramic X-ray photographing apparatus is to photograph the whole in the circumferential direction around the X-ray generator, it is a device that can take a panoramic view so that you can see the entire tooth condition and the jaw joint at a glance.

In general, in order to acquire a CT X-ray image and a panoramic X-ray image, there is a problem that a CT X-ray imaging apparatus equipped with a CT X-ray sensor and a panoramic X-ray imaging apparatus equipped with a panoramic X-ray sensor must be provided. .

In order to solve this problem, by replacing the CT X-ray sensor or panoramic X-ray sensor in one X-ray imaging apparatus, 'X-ray imaging apparatus that can selectively acquire CT X-ray image and panoramic X-ray image Has been disclosed.

However, although the 'X-ray imaging apparatus' has an advantage of capturing both CT X-ray images and panoramic X-ray images with one X-ray image acquisition device, CT for acquiring CT X-ray images and panoramic X-ray images There was an inconvenience of selectively mounting the X-ray sensor and the panoramic X-ray sensor.

In order to solve the above-mentioned inconvenience, as disclosed in Korean Patent Application Publication No. 2010-0120810, one dental X-ray image and a panoramic X-ray image are acquired using one X-ray image acquisition device, but one area sensor Dentistry CT and panoramic X-ray image acquisition devices have been disclosed to selectively acquire CT X-ray images and panoramic X-ray images using only a bay.

Specifically, the dental CT and panoramic X-ray image acquisition device moves the light source unit 110 as shown in FIG. 1 to select an X-ray irradiation area, or as shown in FIG. 2. , X-ray sensor unit 120 had to 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, and in order to move the X-ray sensor unit 120, a separate X-ray sensor unit moving device is provided. As the device for moving the light source unit or the device for moving the X-ray sensor unit has to be provided, there are many problems such as complicated equipment, a problem of increasing manufacturing cost, and a long manufacturing period.

In addition, the dental CT and panoramic X-ray image acquisition device uses the sensing surface of the X-ray sensor used during CT X-ray imaging in panoramic X-ray imaging as shown in FIGS. 1 and 2. When CT X-ray imaging is performed after panoramic X-ray imaging, deterioration occurs in the sensing surface of the sensor used for panoramic X-ray imaging.

(Prior art document)

Publication No. 2010-0120810 (published November 17, 2010)

An object of the present invention for solving the problems according to the prior art, by adjusting the irradiation range of the collimator unit without moving the X-ray source unit or the X-ray sensor unit in the irradiation range and CT imaging when shooting An object of the present invention is to provide an X-ray photographing apparatus capable of preventing a deterioration of an X-ray sensor unit by changing an irradiation range.

An X-ray imaging apparatus of the present invention for solving the above technical problem, X-ray source unit; A collimator for adjusting an irradiation range of X-rays radiated from the X-ray source unit; And an X-ray sensor unit having a sensing surface divided into a plurality of acquisition surfaces, and detecting an X-ray passing through the collimator unit, wherein the collimator unit includes an X on the plurality of acquisition surfaces during CT imaging. The line is adjusted to be irradiated and configured to irradiate X-rays to at least a portion of one of the acquisition surfaces of the plurality of acquisition surfaces during panoramic image capturing.

Preferably, the plurality of acquisition surfaces may include a first acquisition surface and a second acquisition surface, and X-rays may be irradiated onto at least a portion of the first acquisition surface when the panoramic image is captured.

Preferably, the first acquisition surface may be a surface from which a reference image, which is a reference for combining the combined image for generating the CT final image, is obtained, and the second acquisition surface may be a surface from which the combined image is obtained. .

Preferably, the area ratio of the first acquisition surface and the second acquisition surface may be in the range of 1: 9 to 3: 7.

Preferably, the first acquisition surface and the second acquisition surface may be composed of one sensor.

Preferably, the first acquisition surface and the second acquisition surface may be composed of different sensors, respectively.

Preferably, both the first acquisition surface and the second acquisition surface are activated when the CT image is taken, and some surfaces where X-rays are radiated from the first acquisition surface are activated when the panorama image is taken.

Preferably, the partial surface activated during the panoramic image capturing may be configured to be a different area for each panoramic image capturing.

Preferably, some of the surfaces activated during the panoramic image capturing may be configured to be different regions periodically.

Preferably, the partial surface activated when capturing the panoramic image may be configured to be different regions for each of a plurality of photographing viewpoints photographed to obtain one panoramic image.

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

In addition, by operating the existing collimator unit configured to adjust the irradiation range without mechanically driving the sensor unit and the light source unit, the additional manufacturing cost is increased by changing the irradiation range during CT imaging and the irradiation range during panoramic image shooting. In addition to minimizing, the time required for assembly of the device can be shortened.

1 is a view showing a first embodiment for obtaining a panoramic X-ray image of the conventional dental CT and panoramic X-ray image acquisition device.

2 is a diagram illustrating a second embodiment for acquiring a panoramic X-ray image of a dental CT and panoramic X-ray image obtaining apparatus of a species.

3 is a view for explaining the CT image acquisition and the panoramic image acquisition of the X-ray imaging apparatus according to an embodiment of the present invention.

4 to 6 are views illustrating a process of acquiring a panoramic X-ray image of an X-ray imaging apparatus according to an embodiment of the present invention.

The present invention can be embodied in many other forms without departing from the spirit or main features thereof. Therefore, the embodiments of the present invention are merely examples in all respects and should not be interpreted limitedly.

Terms such as first and second 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 the second component, and similarly, the second component may also be referred to as the first component.

The term and / or includes a combination of a plurality of related items or any item of a plurality of related items.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be.

On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.

In this application, the terms "comprise", "comprise", "have", and the like are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification. Or other features or numbers, steps, operations, components, parts or combinations thereof in any way should not be excluded in advance.

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.

Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art, and are not construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, and the same or corresponding components will be denoted by the same reference numerals regardless of the reference numerals and redundant description thereof will be omitted.

In the following description of the present invention, if it is determined that the detailed description of the related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

3 is a view for explaining the CT image acquisition and panoramic image acquisition of the X-ray imaging apparatus according to an embodiment of the present invention, Figures 4 to 6 is a panorama of the X-ray imaging apparatus according to an embodiment of the present invention A diagram illustrating a process of acquiring an X-ray image.

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

Meanwhile, the X-ray source unit 100 and the X-ray sensor unit 300 are positioned to be provided on one side and the other side of the rotating unit (not shown), and when the rotating unit is rotated, CT image photographing or panoramic image capturing. Will be able to.

As described above, CT imaging or panoramic imaging while being rotated by the rotating means is the same as or similar to the conventional X-ray imaging apparatus, so 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 examinee's head 10, and generates X-rays inside the X-ray source unit 100. X-ray light source (not shown) may be provided.

Next, the collimator 200 will be described.

The collimator 200 is a portion for adjusting the irradiation range of the X-rays irradiated from the X-ray source unit 100, the collimator 200 is installed in parallel with each other to be composed of a plurality of lead plates that can be adjusted The irradiation range of the X-rays may be adjusted by adjusting the sizes of the slits 200h by adjusting the positions of the plurality of lead plates, respectively.

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

The X-ray sensor unit 300 is a portion for detecting the X-rays passing through the collimator unit 200, the sensing surface 310 divided into the first acquisition surface 311 and the second acquisition surface 312 is It is provided.

In detail, the sensing surface 310 may include one sensor or a plurality of sensors.

For example, when the sensing surface 310 is composed of one sensor, a partial area 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.

In addition, when the sensing surface 310 is composed 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.

Hereinafter, referring to FIGS. 3 to 6, as described above, 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 may be described. And operation will be described.

The collimator 200 for adjusting the irradiation range of the X-rays irradiated from the X-ray source unit 100 to the X-ray sensor unit 300, as shown in Figure 3, during CT imaging (left side of the drawing X-rays are adjusted to the entire surfaces of the first acquisition surface 311 and the second acquisition surface 312, and at least a portion of the first acquisition surface 311 when taking a panoramic image (right side of the drawing) The surface is configured to irradiate X-rays.

Here, the first acquisition surface 311 is a surface obtained by obtaining a reference image as a reference for combining the combined image for generating the CT final image, the second acquisition surface 312 is obtained from the combined image It is composed of cotton.

Specifically, the X-ray source unit 100 and the X-ray sensor unit 300 is rotated based on a predetermined rotation axis by a rotating means (not shown) during CT imaging, as shown in FIG. 7. During the rotation of the X-ray source unit 100 and the X-ray sensor unit 300, the first acquisition surface 311 and the second acquisition surface 312 are rotated at a plurality of photographing points (multiple angles). X-rays are irradiated on the entire surface, a reference image is obtained on the first acquisition surface 311, and a combined image is obtained on the second acquisition surface 312.

That is, a plurality of planar 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.

One CT final image is obtained by combining the plurality of plane image data thus obtained, wherein a reference image, which is a reference for combining the plurality of plane image data, is captured by the first acquisition surface 311. The combined image, which is combined by the image and generated as the CT final image, is captured by the second acquisition surface 312. As illustrated in FIG. 8, a CT final image having a 3D shape may be generated.

On the other hand, the area ratio of the first acquisition surface 311 and the second acquisition surface 312 is preferably in the range of 1: 9 to 3: 7, which means that the area of the first acquisition surface 311 is too large If the area of the first image is small, there is a problem that an excessive calculation process for combining the combined image is required, and if the area of the first acquisition surface 311 is too large, there is a problem that the efficiency of using the sensor falls.

On the other hand, when the CT image is taken, both the first acquisition surface 311 and the second acquisition surface 312 are activated because an image must be taken from both the first acquisition surface 311 and the second acquisition surface 312. When taking a panoramic image, it is preferable that a part of the first acquisition surface 311 to which X-rays are irradiated is selectively activated, thereby extending the life of the sensor.

At this time, it is preferable that some surfaces activated during the panoramic image capturing are configured to be different regions or periodically different regions every panoramic image capturing, thereby preventing any specific region from being continuously used.

In particular, as shown in FIGS. 4 to 6, some surfaces activated during capturing the panoramic image are configured to be different regions for a plurality of capturing points captured to obtain one panoramic image. It can effectively prevent the continuous use.

The present invention as described above has the advantage that it is possible to prevent the degradation of the X-ray sensor unit 300, specifically, after the first photographing surface 311 after the panorama photographing the first acquisition surface 311 and the first In the case of CT imaging on the second acquisition surface 312, the final CT image is a second image in which the panorama acquisition is not used and the image acquired on the first acquisition surface 311, which may cause deterioration, is not used and panorama shooting is not performed. Since only the image of the acquisition surface 312 is combined and configured, the quality of the final CT image can be improved.

Although the present invention has been described with reference to the accompanying drawings, it will be apparent to those skilled in the art that many different and obvious modifications are possible without departing from the scope of the invention from this description. Therefore, the scope of the invention should be construed by the claims described to include many such variations.

Claims

X-ray source portion;

A collimator for adjusting an irradiation range of X-rays radiated from the X-ray source unit; And

The sensing surface is divided into a plurality of acquisition surface is provided, the X-ray sensor unit for detecting the X-rays passing through the collimator portion; is configured to include,

The collimator is adjusted so that X-rays are irradiated onto the plurality of acquisition surfaces during CT imaging, and X-rays are configured to irradiate X-rays on at least part of one of the acquisition surfaces of the plurality of acquisition surfaces during panoramic image shooting. Shooting device.
The method of claim 1,

And the plurality of acquisition surfaces comprise a first acquisition surface and a second acquisition surface, and wherein X-rays are irradiated onto at least a portion of the first acquisition surface when the panoramic image is taken.
The method of claim 2,

The first acquisition surface is a surface from which a reference image, which is a reference for combining the combined image for generating the CT final image, is obtained.

The second acquisition surface is an X-ray imaging apparatus, characterized in that the surface obtained the combined image.
The method of claim 3,

And the area ratio of the first acquisition surface and the second acquisition surface is in the range of 1: 9 to 3: 7.
The method of claim 2,

And the first acquisition surface and the second acquisition surface comprise one sensor.
The method of claim 2,

And the first acquisition surface and the second acquisition surface are each composed of different sensors.
The method of claim 2,

And both the first acquisition surface and the second acquisition surface are activated at the time of CT imaging, and at least one surface on which X-rays are irradiated from the first acquisition surface is activated at the time of panoramic image capturing.
The method of claim 7, wherein

And a portion of the surface activated during the panoramic image capturing is configured to be a different area for each panoramic image capturing.
The method of claim 7, wherein

The X-ray photographing apparatus, characterized in that the partial surface activated during the panoramic image is periodically configured to be a different area.
The method of claim 7, wherein

And a portion of the surface activated during the panoramic image capturing is configured to be a different area for each of a plurality of photographing viewpoints photographed to obtain one panoramic image.