WO2016111432A1

WO2016111432A1 - Image photographing method and device

Info

Publication number: WO2016111432A1
Application number: PCT/KR2015/007860
Authority: WO
Inventors: 박무용; 이동율
Original assignee: 오스템임플란트 주식회사
Priority date: 2015-01-08
Filing date: 2015-07-28
Publication date: 2016-07-14
Also published as: KR101661055B1; KR20160085942A

Abstract

The present invention relates to an image photographing method and device, which can photograph a CT image having an empty central portion thereof using a small area X-ray sensor in order to photograph a dental CT image which does not affect a diagnosis even when a central portion of the image is empty as in a CT image of a tooth, and therefore can reduce material costs. To this end, the image photographing method according to the present invention is configured to photograph a CT image while rotating an X-ray source, which irradiates an X-ray, and an X-ray sensor, which senses the X-ray, with reference to a virtual rotation axis passing one point deviated from the irradiation path of the X-ray, wherein the CT image is photographed by the small area X-ray sensor so that an outer area of the central area including the rotation axis is photographed.

Description

Image capturing method and device

The present invention relates to an imaging method and apparatus, and more particularly, to a dental CT image taking a dental CT image does not affect the diagnosis even if the central portion is empty, such as a CT image of the tooth, the central portion is empty The present invention relates to an image capturing method and apparatus capable of reducing a material cost by photographing a CT image.

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.

1 is a perspective view illustrating a general dental imaging apparatus.

As shown in FIG. 1, the dental imaging apparatus 10 includes a pedestal 11 supported by a floor of a building, and a support pillar provided on the pedestal 11 so as to be supported by the pedestal 11. 12a, the sliding rail 12b extending to the upper end of the support pillar 12a, the lifting portion 13 formed in an approximately 'a' shape so as to move up and down along the sliding rail 21, the lifting It is configured to include a gantry 14 coupled to the lower portion of the portion 13 through a rotation axis to be linearly movable and rotatable.

One side of the gantry 14 is provided with an X-ray source 15a for irradiating X-rays and a collimator 15b for adjusting the irradiation range of X-rays irradiated from the X-ray source 15a, and the gantry 14 On the other side of the X-ray sensor 16 is detected through the collimator to detect the X-rays passed through the receiver.

* The patient grasps the handle 17 when the photographing takes place, and the jaw is fixed to the pedestal 18. The operator operates the Touch LCD 19 to set the image photographing condition and then photographs the patient.

On the other hand, the CT image photographing method using the dental imaging apparatus as described above, there is a 'full scan' method as shown in Figure 2, and a 'half scan' method as shown in FIG. .

In the 'full scan' CT imaging method, as shown in FIG. 2 (a), X-rays radiated from an X-ray source pass through the entire patient's teeth and are photographed using a large-area X-ray sensor. As shown in (b) of FIG. 2, by rotating 180 °, a cylindrical CT image as shown in (c) of FIG. 2 is obtained.

In the 'half scan' CT imaging method, as shown in FIG. 3 (a), X-rays radiated from an X-ray source pass about half of a patient's teeth and are photographed using a large-area X-ray sensor. As shown in (b) of FIG. 3, by rotating 360 °, a cylindrical CT image as shown in (c) of FIG. 3 is obtained.

The CT scan method of the 'full scan' method has a merit in that the cylindrical CT image can be obtained only by 180 ° rotation, and the recording time is short, and the CT scan method of the 'half scan' method requires 360 ° rotation. Although it takes more time than the CT scan method of the 'Full scan' method, it is advantageous in that a wider area can be photographed than the CT scan method of the 'Full scan' method.

However, the above-described 'full scan' CT imaging and 'half scan' CT imaging have a problem of using a large area sensor, and the material cost of the device increases due to the use of such a large area sensor. There was a problem.

(Prior art document)

Japanese Patent Publication No. 5390512 (2013.10.18)

An object of the present invention for solving the problems according to the prior art, the center portion is empty by using a small area X-ray sensor for imaging the dental CT image does not affect the diagnosis even if the center portion is empty, such as CT images of the teeth The present invention provides an image capturing method and apparatus capable of capturing CT images to reduce material costs.

The imaging method of the present invention for solving the technical problem, the X-ray source for irradiating the X-rays and the X-rays to the X-rays based on the virtual axis of rotation passing through one point eccentric in the X-ray irradiation path While imaging the CT image while rotating the X-ray sensor, a small area X-ray sensor to shoot the outer region of the central region including the rotation axis.

Preferably, one image may be generated by synthesizing such that the central regions of the CT photographed images obtained by taking at least two images overlap each other.

Preferably, the X-ray sensor may rotate while being spaced apart from a predetermined gap on a virtual rotation reference plane parallel to the X-ray irradiation path passing through the rotation axis.

The imaging method of the present invention for solving the technical problem, the X-ray source and the X-ray to irradiate the X-rays on the basis of the virtual first axis of rotation passing through one point eccentric in the X-ray irradiation path A first photographing step of photographing a CT image while rotating the sensing X-ray sensor, but photographing the outer region of the central region including the first rotation axis with a small area X-ray sensor; Rotating an X-ray source that radiates the X-rays and an X-ray sensor that senses the X-rays based on a virtual second axis of rotation spaced apart from the first rotational axis and spaced apart from one point in the X-ray irradiation path A second imaging step of taking a CT image, but taking a small area X-ray sensor to photograph an outer region of the central region including the second rotation axis; And an image synthesizing step of synthesizing the first photographed image photographed in the first photographing step and the second photographed image photographed in the second photographing step into a single image.

Preferably, the outer area photographed in the first photographing step overlaps the center area of the second photographing step, and the outer area photographed in the second photographing step can be photographed to overlap the center area of the first photographing step. have.

The imaging device of the present invention for solving the technical problem, the fixed body portion; A rotating body part having an X-ray source on one side and an X-ray sensor on the other side; And the fixed body part and the rotating body part, wherein the rotating body part is based on an imaginary rotation axis passing through an eccentric point in an X-ray irradiation path irradiated from the X-ray source to the X-ray sensor. It is configured to include; a rotation drive unit for rotating.

Preferably, the rotary drive shaft provided in the rotating body portion corresponding to the position of the virtual rotation axis; And rotation driving means for rotating the rotation driving shaft.

Preferably, the rotary drive shaft provided in the rotating body portion corresponding to one point of the irradiation path of the X-ray irradiated from the X-ray source to the X-ray sensor; Rotary drive means for rotating the rotary drive shaft; First reciprocating driving means for reciprocating the rotary driving means in one direction; And second reciprocating drive means for reciprocating the first reciprocating drive means in a direction crossing the reciprocating direction of the first reciprocating drive means.

As described above, the present invention allows the CT image of the center to be taken by using a small area X-ray sensor for imaging of a dental CT image that does not affect diagnosis even if the center is empty, such as a CT image of a tooth. There is an advantage that can be saved.

In addition, since a plurality of CT images are photographed for image expansion, a single image is generated by synthesizing so that the central region of each image overlaps, thereby generating a CT image of a wide area.

1 is a perspective view illustrating a general dental imaging apparatus.

2 is a view for explaining a CT scan by the conventional 'full scan' method.

3 is a view for explaining the CT scan by the conventional 'Half scan' method.

4 is a diagram for describing an image capturing method according to an embodiment of the present invention.

5 is a view for explaining a process of synthesizing a plurality of CT images by the image capturing method according to an embodiment of the present invention.

6 is a block diagram showing the configuration of an image photographing apparatus according to an embodiment of the present invention.

7 is a block diagram showing the configuration of an image capturing apparatus according to another 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.

* An image capturing method according to an embodiment of the present invention is a method of capturing a CT image for diagnosing a dental condition of a patient, and scans the entire patient's teeth using a small area X-ray sensor (SR). That's how it is.

Specifically, the image capturing method of the present embodiment, as shown in (a) of Figure 4, the virtual axis of rotation (RX) passing through a point eccentrically by the length 'd1' in the X-ray irradiation path (R) As a reference, the CT image is taken while rotating the X-ray source LT for irradiating the X-ray and the X-ray sensor SR for sensing the X-ray.

At this time, the X-ray sensor SR is a size that can be rotated while maintaining a predetermined distance (d2) spaced apart from the virtual rotation reference plane parallel to the X-ray irradiation path (R) passing through the rotation axis (RX) It consists of a small-area sensor of the outside area S, except for the central area (S ') including the rotation axis (RX) by the small area X-ray sensor (SR).

Therefore, as shown in (b) of FIG. 4, as shown in (c) of FIG. 4, the cross-sectional images are photographed and combined over a plurality of times based on the virtual rotation axis RX. Similarly, it is possible to obtain a cylindrical 3D image with an empty central portion.

On the other hand, in the imaging using the small area X-ray sensor (SR) in order to obtain a 3D image of the cylindrical hollow, the outer area (S) taken by the small area X-ray sensor (SR) is the It is done to include tooth trajectories.

That is, the central area S 'excluded from the photographing area is a part which is not necessary for imaging because it is not necessary for diagnosing the teeth of the examinee, and the outer area S includes the tooth trajectory of the examinee. It is possible to obtain a 3D image of.

Through the above-described imaging method, in imaging a CT image of a special part such as the tooth of the examinee, it is possible to acquire only the tooth part of the examinee as a 3D image by using a small area X-ray sensor SR.

Meanwhile, as illustrated in FIG. 5, a single image may be generated by synthesizing such that the central regions S1 ′ and S2 ′ of the CT captured images obtained by capturing at least twice through the above-described photographing method overlap each other. .

The method for this purpose is written including a first photographing step, a second photographing step, and an image synthesizing step.

First, in the first photographing step, the X-ray source LT for irradiating the X-rays with respect to the virtual first rotational axis RX1 passing through one point eccentrically in the X-ray irradiation path R and the X While taking a CT image while rotating the X-ray sensor SR for sensing a line, the small-area X-ray sensor so as to photograph the outer region S1 of the central region S1 ′ including the first rotation axis RX1. SR).

Next, in the second photographing step, the X-rays on the basis of the virtual second axis of rotation (RX2) spaced apart from the first axis of rotation (RX1) passing through a point eccentric in the X-ray irradiation path (R) While taking a CT image while rotating the X-ray source (LT) for irradiating the X-ray and the X-ray sensor (SR) for sensing the X-ray, the outer region of the central area (S2 ') including the second axis of rotation (RX2) Photograph (S2) with a small area X-ray sensor (SR) to capture the image.

Here, a part of the outer area S1 photographed in the first photographing step overlaps the center area S2 ′ of the second photographing step, and a part of the outer area S2 photographed in the second photographing step is The image is taken to overlap the central area S1 ′ of the first photographing step, and the outer area S1 photographed in the first photographing step includes a part of the tooth trajectory of the examinee and is photographed in the second photographing step. The outer area S2 is to include the remaining part of the tooth trajectory of the examinee.

Next, in the image synthesis step, the first photographed image photographed in the first photographing step and the second photographed image photographed in the second photographing step are synthesized to generate one image.

As described above, since a plurality of CT images are photographed and synthesized such that the central regions S1 ′ and S2 ′ of the images overlap, a single image may be generated as well.

Meanwhile, in the above, the case of synthesizing an image through two shots is exemplified, but after three or more shots, a plurality of images may be synthesized to generate one image.

Meanwhile, an image capturing apparatus for implementing the capturing method described above will be described.

As shown in FIG. 6 or 7, the image capturing apparatus of the present exemplary embodiment includes a fixed body part 100, a rotating body part 200, and a rotation driving part 300.

The fixed body part 100 is a part for supporting the rotatable body part 200 so as to be rotatable. For example, the fixed body part 100 may correspond to the lifting part 13 of FIG. 1.

The rotating body portion 200 is coupled to the lower portion of the fixed body portion 100 through the rotation drive shaft 310 to be linearly moveable and rotatable, for example, to correspond to the gantry 14 of FIG. Can be.

The rotary drive unit 300 is configured to include the rotary drive shaft 310 to connect the fixed body portion 100 and the rotary body portion 200, the X-ray sensor (LT) in the X-ray source (LT) The rotating body 200 is driven to rotate based on the virtual rotation axis RX passing through an eccentric point in the X-ray irradiation path R irradiated by SR.

For example, as shown in FIG. 6, the rotation driving unit 300 includes a rotation driving shaft 310 provided in the rotation body part 200 and the position corresponding to the position of the virtual rotation axis RX. It may be configured to include a rotary drive means 340 for rotating the rotary drive shaft 310.

Specifically, as shown in FIG. 6, the rotating body part 200 is rotated based on the rotation driving shaft 310 positioned corresponding to the position of the rotation axis RX, and the X-ray source LT ) And the X-ray sensor SR rotate in an eccentric state with respect to the rotation axis RX.

In addition, for example, the rotation driving unit 300, as shown in Figure 7, one point of the irradiation path (R) of the X-rays irradiated from the X-ray source (LT) to the X-ray sensor (SR). Corresponding to the rotating drive shaft 310 provided in the rotating body portion 200, the rotary driving means 340 for driving the rotary driving shaft 310, the reciprocating movement of the rotary driving means 340 in one direction Including a first reciprocating driving means 320 and the second reciprocating driving means 330 for reciprocating the first reciprocating driving means 320 in a direction crossing the reciprocating direction of the first reciprocating driving means 320 Can be configured.

Specifically, as shown in FIG. 7, the rotating body part 200 is rotated based on the rotation driving shaft 310, and the first reciprocating driving means 320 is rotated from 0 ° to 90 °. ) Moves to the right side of the drawing and the second reciprocating driving means 330 moves to the lower side of the drawing, and the first reciprocating driving means 320 is the left side of the drawing in a section that rotates from 90 ° to 180 °. The second reciprocating driving means 330 moves downward to the original position, and the first reciprocating driving means 320 is rotated from 180 ° to 270 ° in the section. While moving to the left side and the second reciprocating driving means 330 moves to the upper side of the drawing, the first reciprocating driving means 320 is moved to the right side of the drawing in a section that rotates from 270 ° to 0 °. The second reciprocating driving means 330 is returned to the position of It moves to the upper side of.

As described above, the X-ray source LT and the X-ray sensor SR are based on the rotation axis RX by interlocking the first reciprocating driving means 320 and the second reciprocating driving means 330. Rotate in an eccentric state.

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

Taking a CT image while rotating an X-ray source for irradiating the X-rays and an X-ray sensor for sensing the X-rays based on a virtual axis of rotation passing through an eccentric point of rotation in an X-ray irradiation path, wherein the axis of rotation Imaging method characterized in that the imaging with a small area X-ray sensor so as to photograph the outer region of the central region including.
The method of claim 1,

And generating a single image by synthesizing such that the central regions of the CT captured images obtained by at least two shots overlap each other.
The method of claim 1,

And the X-ray sensor rotates while being spaced apart from a predetermined gap on an imaginary rotation reference plane parallel to the X-ray irradiation path while passing through the rotation axis.
The method of claim 1,

And the outer region includes a tooth trajectory of the examinee.
Taking a CT image while rotating an X-ray source for irradiating the X-rays and an X-ray sensor for sensing the X-rays based on a virtual first axis of rotation passing through an eccentric point of rotation in an X-ray irradiation path, A first photographing step of photographing an outer region of the central region including the first rotation axis with a small area X-ray sensor;

Rotating an X-ray source that radiates the X-rays and an X-ray sensor that senses the X-rays based on a virtual second axis of rotation spaced apart from the first rotational axis and spaced apart from one point in the X-ray irradiation path A second imaging step of taking a CT image, but taking a small area X-ray sensor to photograph an outer region of the central region including the second rotation axis; And

And an image synthesizing step of synthesizing the first photographed image photographed in the first photographing step and the second photographed image photographed in the second photographing step into a single image.
The method of claim 5,

The outer region photographed in the first photographing step is overlapped with the center region of the second photographing step, and the outer region photographed in the second photographing step is photographed so as to overlap with the central region of the first photographing step. How to shoot video.
The method of claim 5,

And the outer region includes a tooth trajectory of the examinee.
Fixed body part;

A rotating body part having an X-ray source on one side and an X-ray sensor on the other side; And

Is configured to connect the fixed body portion and the rotating body portion, the rotating body portion on the basis of the virtual axis of rotation passing through an eccentric point in the irradiation path of the X-rays irradiated from the X-ray source to the X-ray sensor Rotating drive unit for driving; Imaging apparatus comprising a.
The method of claim 8,

A rotation drive shaft provided in the rotation body part corresponding to the position of the virtual rotation axis; And

And rotation driving means for rotating the rotation driving shaft.
The method of claim 8,

A rotating drive shaft provided in the rotating body part corresponding to one point of the irradiation path of the X-ray irradiated from the X-ray source to the X-ray sensor;

Rotary drive means for rotating the rotary drive shaft;

First reciprocating driving means for reciprocating the rotary driving means in one direction; And

And a second reciprocating driving means for reciprocating the first reciprocating driving means in a direction intersecting with the reciprocating movement direction of the first reciprocating driving means.