KR102292871B1 - Method for analyzing panoramic image and image processing apparatus performing the same - Google Patents

Abstract

A panoramic image analysis method and a dental image processing apparatus for performing the same are disclosed. According to the panoramic image analysis method and the dental image processing apparatus performing the same according to an embodiment, the vertical axis adjustment of the panoramic image is performed on the panoramic image without changing the screen to the multi-planar reconstruction screen composed of the CT image. As it is performed, it is possible to intuitively acquire a panoramic image intended by the user and analyze it.

Description

Method for analyzing panoramic image and image processing apparatus performing the same

The present invention relates to image processing technology, and more particularly, to a technology for generating and manipulating a panoramic image using a computed tomography image.

Dental computed tomography (CT, hereinafter referred to as 'CT') or CBCT (Cone-Beam CT) is widely used for diagnosis and treatment planning as it provides accurate 2D and 3D information. A panoramic image may be generated from the CT image. These panoramic images are created automatically or manually by drawing dental arches on CT images. When adjusting the dental arch after that, it should be adjusted on the CT image. In this case, in a state where it is difficult to intuitively grasp the correlation between the CT image and the panoramic image, adjustment must be made on the CT image screen, and the adjusted result must be checked in the panoramic image and readjusted in the CT image. discomfort exists.

According to an embodiment, when a panoramic image is adjusted by using a CT image for panoramic image analysis, the user can intuitively obtain a desired panoramic image by resolving the inconvenience of using it. A panoramic image analysis method and a dental image processing apparatus for performing the same are proposed.

A panoramic image analysis method according to an embodiment includes the steps of acquiring a CT image, generating a curved dental arch from the acquired CT image, and constructing a panoramic image using the generated dental arch; , reconstructing a panoramic image by manipulation on the panoramic image without switching to a multi-planar reconstruction screen composed of a CT image, and analyzing the reconstructed panoramic image.

Manipulation on the panoramic image may include manipulating the vertical axis angle and dental arch of the panoramic image.

The step of reconstructing the panoramic image includes adjusting and displaying the vertical axis angle of the panoramic image according to the user manipulation signal input in the panoramic image, and vertical axis angle adjustment of the panoramic image. The method may include displaying the CT image of which the axis angle is adjusted.

In the step of reconstructing the panoramic image, the vertical axis angle of the panoramic image can be adjusted by receiving a user manipulation signal through a mouse wheel operation operation or a mouse drag-and-drop operation in the panoramic image within a preset angle adjustment range. and the preset angle adjustment range can be modified.

In the step of reconstructing the panoramic image, the vertical axis angle may be adjusted and displayed for each panoramic image of the maxilla and the panoramic image of the mandible in order to reconstruct the panoramic image of the maxillary arch and the mandibular arch.

The step of reconstructing the panoramic image includes adjusting and displaying a horizontal line corresponding to the dental arch of the CT image in the panoramic image according to a user manipulation signal input in the panoramic image, and the horizontal line of the panoramic image. The method may include displaying a CT image in which the horizontal line and the corresponding dental arch are automatically adjusted according to the adjustment.

In the step of adjusting and displaying the horizontal line, a user manipulation signal is received and a predetermined horizontal coordinate (px) in the panoramic image corresponding to the dental arch of the CT image is converted into a new horizontal coordinate (px') in the front-rear direction as the z-axis direction. can be moved to

In the step of analyzing the reconstructed panoramic image, the panoramic image before the change and the panoramic image changed through the reconstruction may be compared and analyzed.

The step of analyzing the reconstructed panoramic image includes: confirming whether the panoramic image reconstructed by manipulation on the panoramic image is reconstructed as a panoramic image intended by the user; Analyzing the reconstructed panoramic image when it is reconstructed as an image, and additionally reconstructing and analyzing the panoramic image by manipulation on the panoramic image when it is not reconstructed as the intended panoramic image. have.

The method for analyzing a panoramic image may further include displaying a user guide interface for guiding an operation on the panoramic image on the panoramic image.

A dental image processing apparatus according to another embodiment includes a data acquisition unit for acquiring a dental image including a CT image, an input unit receiving a user manipulation signal, and a user manipulation received from the input unit on a panoramic image generated from the CT image. A control unit that adjusts the vertical axis angle of the panoramic image without changing the screen to a multi-planar reconstruction screen composed of a CT image according to a signal, and an output unit that displays a dental image including a panoramic image with the adjusted vertical axis angle include

The controller may automatically adjust the vertical axis angle of the panoramic image and the corresponding CT image according to the adjustment of the vertical axis angle of the panoramic image and display it through the output unit.

The controller may adjust the vertical axis angle for each panoramic image of the maxilla and the panoramic image of the mandible in order to reconstruct the panoramic image of the maxillary arch and the mandibular arch.

The control unit adjusts the horizontal line corresponding to the dental arch of the CT image in the panoramic image according to the user manipulation signal received from the input unit on the panoramic image and displays it through the output unit, and displays the horizontal line and the horizontal line according to the adjustment of the horizontal line of the panoramic image. The dental arch of the corresponding CT image may be automatically adjusted and displayed through the output unit.

According to the panoramic image analysis method and the dental image processing apparatus performing the same according to an embodiment, the vertical axis adjustment of the panoramic image is converted to a multi-planar reconstructed screen composed of a CT image, and the panoramic image is new It can be done directly on the panoramic image without generation. Accordingly, it is possible to intuitively obtain a panoramic image desired by the user. In this case, the process of adjusting on the multi-planar reconstruction screen in a state where it is difficult to intuitively grasp the correlation between the existing CT image and the panoramic image, checking the adjusted result on the panoramic image, and then re-adjusting on the multi-plane reconstruction screen The inconvenience of having to go through can be solved. Furthermore, since it is possible to reconstruct the upper and lower panoramic images by adjusting the angle of the vertical axis on the panoramic image, it is possible to obtain a more intuitive panoramic image.

In addition, as the dental arch adjustment is directly performed on the panoramic image, it is possible to intuitively manipulate the correlation of the panoramic image according to the change of the dental arch. As the dental arch on the multi-planar reconstruction screen is automatically adjusted through horizontal adjustment in the panoramic image, it is difficult to intuitively understand the correlation with the panoramic image when manually adjusting the dental arch. Inconvenient problems that have to go through the process of re-adjusting after checking the problems that need to be done and the adjusted results can be solved. Users can focus and focus the image rather than modifying it on the multi-planar reconstruction screen, and give a 2.5D effect in the 2D panoramic image.

Furthermore, since the vertical axis and dental arch of the panoramic image are adjusted without switching to a separate multi-planar reconstruction screen, the original panoramic image and the reconstructed panoramic image can be compared and analyzed.

1 is a view showing the configuration of a dental image processing apparatus according to an embodiment of the present invention;
2 is a view showing a CT image screen in 3D form having an ideal vertical axis angle of upper and lower jaw according to an embodiment of the present invention;
3 is a diagram illustrating an example of generating a panoramic image of the maxilla from a 2D CT image according to an embodiment of the present invention;
4 is a diagram illustrating an example of generating a panoramic image of the mandible from a 2D-type CT image according to an embodiment of the present invention;
5 is a diagram illustrating a multi-planar reconstruction screen in which a vertical axis angle is automatically adjusted according to a vertical axis angle adjustment on a panoramic image according to an embodiment of the present invention;
6 is a view showing a screen for adjusting a vertical axis angle on a panoramic image according to an embodiment of the present invention;
7 is a view showing a dental arch adjustment screen on a panoramic image according to an embodiment of the present invention;
8 is a view showing a screen showing coordinate movement when adjusting a dental arch using a panoramic image according to an embodiment of the present invention;
9 is a diagram illustrating a flow of a method for analyzing a panoramic image according to an embodiment of the present invention.

Advantages and features of the present invention, and a method for achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the art to which the present invention pertains. It is provided to fully inform the possessor of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

In the description of the embodiments of the present invention, if it is determined that a detailed description of a known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description will be omitted, and the terms to be described later are used in the embodiment of the present invention. These terms are defined in consideration of the function of Therefore, the definition should be made based on the content throughout this specification.

Each block in the accompanying block diagram and combinations of steps in the flowchart may be executed by computer program instructions (execution engine), which computer program instructions are executed by the processor of a general-purpose computer, special-purpose computer, or other programmable data processing device. It may be mounted so that its instructions, which are executed by the processor of a computer or other programmable data processing device, create means for performing the functions described in each block of the block diagram or in each step of the flowchart.

These computer program instructions may also be stored in a computer-usable or computer-readable memory that may direct a computer or other programmable data processing device to implement a function in a particular manner, and thus the computer-usable or computer-readable memory. It is also possible for the instructions stored in the block diagram to produce an article of manufacture containing instruction means for performing the functions described in each block of the block diagram or each step of the flowchart.

And since the computer program instructions may be mounted on a computer or other programmable data processing device, a series of operational steps is performed on the computer or other programmable data processing device to create a computer-executable process to create a computer or other programmable data processing device. It is also possible that the instructions for performing the data processing apparatus provide steps for executing the functions described in each block of the block diagram and each step of the flowchart.

In addition, each block or step may represent a module, segment, or portion of code comprising one or more executable instructions for executing specified logical functions, and in some alternative embodiments the blocks or steps referred to in the block or steps. It should be noted that it is also possible for functions to occur out of sequence. For example, it is possible that two blocks or steps shown one after another may be performed substantially simultaneously, and also the blocks or steps may be performed in the reverse order of the corresponding functions, if necessary.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the embodiments of the present invention illustrated below may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below. The embodiments of the present invention are provided to more completely explain the present invention to those of ordinary skill in the art to which the present invention pertains.

1 is a diagram showing the configuration of a dental image processing apparatus according to an embodiment of the present invention.

Referring to FIG. 1 , a dental image processing apparatus 1 is an electronic device that takes a CT image and generates a panoramic image (CT to Panorama) through image processing. The electronic device includes a computer, a notebook computer, a laptop computer, a tablet PC, a smart phone, a mobile phone, a personal media player (PMP), and personal digital assistants (PDA). The dental image processing apparatus 1 may acquire a CT image from an external CT imaging device, and may have an image processing program for processing the acquired CT image. The CT imaging apparatus may be a cone beam CT (CBCT) apparatus. The CT image thus obtained may be stored in a DICOM (Digital Imaging and Communications in Medicine) file format. After moving the DICOM file obtained by CT scan to the dental image processing device 1, a panoramic image is constructed using an image processing program.

The image processing process using the dental image processing program includes surgical patient registration, CT data and oral model data acquisition of registered patients, registration of CT data and oral model data, and dental arch creation and dentition from registered CT data or oral model data. It consists of a series of processes including creating a panoramic image using the arch, determining the position and size of the crown model from the patient's oral model data, determining the fixture position from the patient's CT data, designing the guide shape, and outputting the final guide.

The present invention corresponds to a process of generating a dental arch from CT data of a patient and generating a panoramic image using the generated dental arch, a process of correcting it, and a process of analyzing the corrected panoramic image among the above processes. .

The dental image processing apparatus 1 according to an embodiment corrects the CT data when constructing a panoramic image, confirms the corrected result in the panoramic image, and re-corrects the CT data to compose a desired panoramic image. Rather, the desired panoramic image is composed by directly modifying the panoramic image. Accordingly, parameters such as the shape of the panoramic image, the axial angle, and the dental arch can be modified directly from the panoramic image, so that the user can intuitively obtain the desired panoramic image.

When modifying parameters on the Multi Planar Reconstruction (MPR, hereinafter referred to as 'MPR') screen composed of CT images, it is necessary to make corrections in a state where it is difficult to intuitively grasp the correlation with the panoramic image. In addition, there is the inconvenience of having to re-correct in the MPR screen after checking the corrected result in the panoramic image. However, in the case of modifying a parameter on a panoramic image according to an embodiment, it can be intuitively modified without being conscious of the correlation of the panoramic image according to the parameter change, and while focusing on the image rather than modifying it on the MPR screen can focus. Also, it is possible to give a 2.5D effect in a 2D panoramic image.

Although the present invention mainly describes a technique for composing and editing a panoramic image using a dental CT image, it specifies that it can be applied to fields dealing with medical images as well as dentistry.

Hereinafter, each component of the dental image processing apparatus 1 having the above-described features will be described in detail with reference to FIG. 1 . Referring to FIG. 1 , the dental image processing apparatus 1 includes a data acquisition unit 10 , a storage unit 12 , a control unit 14 , an input unit 16 , and an output unit 18 .

The data acquisition unit 10 acquires a CT image. A CT image may be received from an external CT imaging device, and a CT image may be taken directly. The CT image may include a 2D cross-sectional image and a 3D image generated through imaging of a patient's tooth structure. The 2D cross-sectional image includes an axial view image, a sagittal view image, and a coronal view image.

The data acquisition unit 10 may be connected to a network by having a communication module capable of receiving wired/wireless reception with an external electronic device, and may receive a CT image from an external CT imaging device connected to the network. As another example, the data acquisition unit 10 may include a scan module capable of scanning a film on which a CT image is printed, and may scan a plurality of films on which a CT image is printed. In addition, the CT image may be received from a storage device storing the CT image. The data acquisition unit 10 may transmit the received CT image to the control unit 14 and may store it in the storage unit 12 . The stored CT images are subject to panoramic image reconstruction in the future.

The controller 14 generates a panoramic image by image processing the CT image received from the data acquisition unit 10 . As an example of image processing, the controller 14 constructs a panoramic image from the acquired CT image through the dental arch. In CT images, dental arches can be drawn automatically or manually along the maxilla or mandible. The dental arch is a curved arch line. The arch line setting is to set the focal layer as the dental arch, and the arch line can be set so that all of the upper and lower teeth come out from the apex to the crown.

The dental arch according to an embodiment is drawn on the axial image of the CT image. At this time, the dental arch consists of at least two or more points, and each point is connected by a spline curve or the like. A panoramic image is created using the dental arch created in this way. The horizontal line of the panoramic image is the straightening of the curved dental arch in the CT image, and the horizontal line of the panoramic image is the same line as the dental arch of the CT image. Therefore, the points input to draw the dental arch can specify the horizontal direction on the panoramic image.

The control unit 14 may convert data obtained in a specific plane (generally an axial direction) in the MPR screen into another plane. For example, data acquired in the axial plane may be converted into a coronal view image, a sagittal view image, and the like.

The control unit 14 according to an embodiment converts the screen to the MPR screen composed of the CT image according to the user manipulation signal received from the input unit 16 on the panoramic image generated from the CT image and the new panoramic image. Adjust the vertical axis angle of the panoramic image without generating. In this case, the output unit 18 displays the dental image including the panoramic image in which the vertical axis angle is adjusted. The controller 14 may automatically adjust the vertical axis angle of the panoramic image and the corresponding CT image according to the vertical axis angle adjustment of the panoramic image and display it through the output unit 18 .

When adjusting the angle of the vertical axis of the panoramic image, the control unit 14 receives the user manipulation signal through the mouse wheel manipulation operation, the mouse drag and drop operation, etc. in the panoramic image within the preset angle adjustment range. You can adjust the vertical axis angle of the panoramic image by receiving it through the The preset angle adjustment range can be modified by the user.

When adjusting the vertical axis angle of the panoramic image, the controller 14 may adjust the vertical axis angle for each panoramic image of the maxilla and the panoramic image of the mandible to reconstruct the panoramic image of the maxillary arch and the mandibular arch. have.

The controller 14 according to another embodiment adjusts the dental arch of the panoramic image. For example, the controller 14 adjusts the horizontal line corresponding to the dental arch of the CT image in the panoramic image according to the user manipulation signal received from the input unit 16 on the panoramic image through the output unit 18 . indicate And according to the horizontal adjustment of the panoramic image, the dental arch of the CT image corresponding to the horizontal line is automatically adjusted and displayed through the output unit 18 .

The output unit 18 outputs various types of information. The output unit 18 according to an embodiment outputs the panoramic image generated through the control unit 14 so that the user can recognize it. In addition, the output unit 18 may provide an enlargement function for viewing a specific part, an axis designation function, a contrast function, and the like. The output unit 18 may display the (re)constructed panoramic image on the screen. The output unit 18 may additionally display a guide interface on the panoramic image in order to facilitate the panoramic image reconstruction by the user.

The input unit 16 receives various user manipulation signals from the user. For example, a user manipulation signal for (re)composition of a panoramic image is received.

The storage unit 12 stores programs and data necessary for image processing by the control unit 14 . For example, instructions for image processing are stored in the storage unit 12 . The instructions are, for example, an instruction for composing the CT images acquired through the data acquisition unit 10 into a panoramic image through the dental arch, and correcting the vertical axis, the dental arch, etc. through correction in the panoramic image. , an instruction for automatically correcting a vertical axis, a dental arch, etc. in a CT image according to correction in a panoramic image, an instruction for displaying an image on which image processing has been performed on the output unit 18, and the like. Correlation information between the panoramic image and the CT image may be stored in the storage unit 12 . For example, correlation information between a curved dental arch in a CT image and a horizontal line in a panoramic image may be stored.

The storage unit 12 includes all kinds of recording media in which programs and data are stored so as to be read by a computer system. Examples include ROM (Read Only Memory), RAM (RAM: Random Access Memory), CD (Compact Disk), DVD (Digital Video Disk)—ROM, magnetic tape, floppy disk, optical data storage device, embedded multimedia It may include at least one of a card (eMMC), a hard disk drive (HDD), a micro SD card, and a USB memory.

FIG. 2 is a diagram illustrating a 3D CT image screen having an ideal vertical axis angle of upper and lower jaws according to an embodiment of the present invention.

Referring to FIG. 2 , when constructing a panoramic image using a 3D-shaped CT image 20, the vertical axis 200 of the maxilla has an inclined shape with the upper end forming the inner side and the lower end forming the outer side. angle to have The vertical axis 210 of the mandible forms an angle such that the upper end forms the outer side and the lower end has an inclined shape forming the inner side.

3 is a diagram illustrating an example of generating a panoramic image of the maxilla from a 2D CT image according to an embodiment of the present invention.

Referring to FIG. 3 , a panoramic image 32 of the maxilla may be constructed using a 2D CT image 30 , for example, a sagittal view image. At this time, the vertical axis 300 of the CT image 30 of the 2D form and the vertical axis 320 of the maxillary panoramic image 32 correspond to each other, and the horizontal axis 302 of the CT image 30 of the 2D form corresponds to each other. and the horizontal axis 322 of the maxillary panoramic image 32 correspond to each other. The red line in the upper panoramic image 32 corresponds to the dental arch.

4 is a diagram illustrating an example of generating a panoramic image of a mandible from a 2D CT image according to an embodiment of the present invention.

Referring to FIG. 4 , a panoramic image 42 of the mandible may be constructed using a 2D CT image 40 , for example, a sagittal view image. At this time, the vertical axis 400 of the CT image 40 of the 2D form and the vertical axis 420 of the mandibular panoramic image 42 correspond to each other, and the horizontal axis 402 of the CT image 40 of the 2D form corresponds to each other. and the horizontal axis 422 of the upper panoramic image 42 correspond to each other. A red line in the mandibular panoramic image 42 corresponds to the dental arch.

5 is a diagram illustrating an MPR screen in which a vertical axis angle is automatically adjusted according to a vertical axis angle adjustment on a panoramic image according to an embodiment of the present invention.

Referring to FIG. 5 , the dental image may be composed of an MPR screen 50 and a panoramic image screen 52 . In FIG. 5 , the MPR screen 50 and the panoramic image screen 52 are displayed at the same time, but they may be displayed through different screen pages. The MPR screen 50 includes a 2D type CT image and a 3D type CT image 502 . The 2D CT image may include an axial view image 500 , a sagittal view image 504 , a coronal view image, and the like. The sagittal view image 504 is formed at a central vertical axis position.

When the user adjusts the vertical axis angle in the panoramic image 52 , the program displays the CT image whose vertical axis angle is automatically adjusted on the MPR screen 50 composed of CT images. For example, as illustrated in FIG. 5 , the vertical axis angle 522 of the panoramic image 52 and the CT image 504 corresponding to the panoramic image 52 is adjusted according to the adjustment of the vertical axis angle of the panoramic image 52 . .

6 is a diagram illustrating a screen for adjusting a vertical axis angle on a panoramic image according to an embodiment of the present invention.

5 and 6 , the user may directly adjust the vertical axis angle 520 in the panoramic image 52 without changing the screen to the MPR screen 50 . A user manipulation signal for manipulating the vertical axis angle 520 in the panoramic image 52 may be a mouse wheel manipulation signal or a mouse drag and drop signal. The vertical axis angle 520 can be operated within a preset angle adjustment range (eg, left and right 45 degrees), and the preset angle adjustment range can be modified. The program may additionally display on the panoramic image 52 a virtual user guide interface guiding the operation of the vertical axis angle 520 to facilitate manipulation of the vertical axis angle 520 in the panoramic image. .

6 shows an example of three-dimensionally displaying the panoramic image 52 and adjusting the vertical axis angle 520 to help understand the present invention, but for adjustment, the panoramic image 52 plane is shown. It is not necessary to switch to the stereoscopic screen as shown in 6 .

When adjusting the vertical axis angle in the panoramic image 52 , the vertical axis angle may be adjusted for each panoramic image of the maxilla and the panoramic image of the mandible in order to reconstruct the panoramic image of the maxillary arch and the mandibular arch. .

7 is a diagram illustrating a dental arch adjustment screen on a panoramic image according to an embodiment of the present invention.

Referring to FIG. 7 , the panoramic image 70 and the CT image 72 may be displayed on one screen through a program and may be displayed on separate pages. The CT image 72 may be an axial view image as shown in FIG. 7 . At this time, as the user manipulates the horizontal point on the panoramic image 70 without changing the screen to the MPR screen composed of the CT image 72, the dental arch point of the CT image 72 corresponding to the horizontal line is automatically adjusted. Can be adjusted. In FIG. 7 , it is shown that the panoramic image 70 and the CT image 72 are adjusted from before to after the arrow, respectively.

8 is a view illustrating a screen showing coordinate movement when adjusting a dental arch using a panoramic image according to an embodiment of the present invention.

Referring to FIG. 8 , if the user performs a forward or backward manipulation of the horizontal point along the z-axis (for example, an operation in which the user drags and drops the mouse wheel) in the panoramic image 70, the CT image 72 ) automatically moves the positions of two nearby points on the dental arch. In this case, the panoramic image 70 may be moved to be inversely proportional to the distance from the horizontal coordinate (px). For example, it is assumed that the user corrects the x coordinate (px) of the panoramic image 70 by moving it to a point (px') 1 mm ahead. Then, based on the x-coordinate (ax) of the dental arch in the CT image 72 corresponding to the x-coordinate (px) of the panoramic image 70, it is located within a preset distance from the x-coordinate (ax) of the dental arch. The x-coordinates (ax1, ax2) of the two dental arches are automatically moved to the x-coordinates (ax1', ax2') of the new dental arches, respectively. The horizontal line of the panoramic image 70 and the dental arch of the CT image 72 are the same line, and the straightening of the dental arch of the CT image 72 is the horizontal line of the panoramic image 70 .

In the CT image, when the distance between the dental arch coordinates (ax) and the first dental arch coordinates (ax1) is x1 and the distance between the dental arch coordinates (ax) and the second dental arch coordinates (ax2) is x2, the panoramic image When the horizontal coordinates (px) of , move x distances, the first dental arch coordinates (ax1) move by x × (x2 / (x1+x2)), and the second dental arch coordinates (ax2) move by x × (x1/2) distances. (x1+x2)) distance can be moved. For example, when there are two points closest to the x-coordinate (ax) of the dental arch, i.e., ax1 (px and distance 4mm) and ax2 (px and distance 8mm), moving px forward by 1mm, ax1 is 1mm × ( 8 / ( 4+8 ) ) = 0.67 mm, ax2 will move 1 mm × ( 4 / ( 4 + 8 ) ) = 0.33 mm.

9 is a diagram illustrating a flow of a method for analyzing a panoramic image according to an embodiment of the present invention.

Referring to FIGS. 1 and 9 , the dental image processing apparatus 1 generates a curved dental arch from a CT image and constructs a panoramic image using the created dental arch ( S910 ).

Then, the dental image processing apparatus 1 adjusts the vertical axis angle of the panoramic image by manipulation on the panoramic image without switching to a multi-planar reconstructed screen composed of a CT image (S920). At this time, the vertical axis angle of the CT image is automatically adjusted to match the vertical axis angle adjustment of the panoramic image. The vertical axis angle adjustment of the panoramic image may be performed by receiving a user operation signal through a mouse wheel operation operation or a mouse drag and drop operation within a preset angle adjustment range, and the preset angle adjustment range can be modified. An example of adjusting the angle of the vertical axis of the panoramic image has been described above with reference to FIGS. 5 and 6 .

In the step of adjusting the vertical axis angle of the panoramic image (S920), the dental image processing apparatus 1 reconstructs the panoramic image of the maxillary and mandibular arches to reconstruct the panoramic image of the maxilla and the panoramic image of the mandible. You can adjust the vertical axis angle separately. Furthermore, a user guide interface for guiding manipulations in the panoramic image may be additionally displayed on the panoramic image.

Next, the dental image processing apparatus 1 checks whether the panoramic image whose vertical axis angle is adjusted is reconstructed into the panoramic image intended by the user (S930), and when the panoramic image is reconstructed as the intended panoramic image The reconstructed panoramic image is analyzed (S940). For example, the panoramic image before the change and the panoramic image changed through reconstruction are compared and analyzed. When it is not reconstructed into the intended panoramic image, the step of adjusting the axis angle in the panoramic image ( S920 ) may be additionally performed.

When the analysis is completed (S950), the analysis operation is terminated. Otherwise, a series of procedures from the step of adjusting the axis angle in the panoramic image (S920) may be repeatedly performed.

Furthermore, when reconstructing the panoramic image, the dental image processing apparatus 1 may adjust a horizontal line corresponding to the dental arch of the CT image in the panoramic image according to a user manipulation signal input in the panoramic image. In this case, the dental arch corresponding to the horizontal line is automatically adjusted to match the horizontal line adjustment of the panoramic image. An embodiment of the adjustment of the dental arch of the panoramic image has been described above with reference to FIGS. 7 and 8 .

Up to now, the present invention has been looked at focusing on the embodiments thereof. Those of ordinary skill in the art to which the present invention pertains will understand that the present invention can be implemented in modified forms without departing from the essential characteristics of the present invention. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is indicated in the claims rather than the foregoing description, and all differences within the scope equivalent thereto should be construed as being included in the present invention.

Claims (14)

In the panoramic image analysis method using a dental image processing apparatus, the dental image processing apparatus
Acquiring a computed tomography (CT, hereinafter referred to as 'CT') image;
generating a curved dental arch from the acquired CT image and constructing a panoramic image using the generated dental arch;
reconstructing a panoramic image by manipulation on the panoramic image without switching to a multi-planar reconstruction screen composed of a CT image; and
analyzing the reconstructed panoramic image;
Panoramic image analysis method comprising a. The method of claim 1, wherein the manipulation on the panoramic image comprises:
A method for analyzing a panoramic image, comprising manipulating the vertical axis angle and the dental arch of the panoramic image. The method of claim 1, wherein reconstructing the panoramic image comprises:
adjusting and displaying a vertical axis angle of a panoramic image according to a user manipulation signal input in the panoramic image; and
displaying a CT image whose vertical axis angle is adjusted to match the vertical axis angle adjustment of the panoramic image;
Panoramic image analysis method comprising a. The method of claim 1, wherein reconstructing the panoramic image comprises:
Adjusts the vertical axis angle of the panoramic image by receiving a user operation signal through mouse wheel operation or mouse drag and drop operation in the panoramic image within the preset angle adjustment range, and the preset angle adjustment range is editable Panoramic image analysis method, characterized in that. The method of claim 1, wherein reconstructing the panoramic image comprises:
Panoramic image analysis method, characterized in that the vertical axis angle is adjusted and displayed for each panoramic image of the maxilla and the panoramic image of the mandible in order to reconstruct the panoramic image of the maxillary and mandibular arches. The method of claim 1, wherein reconstructing the panoramic image comprises:
adjusting and displaying a horizontal line corresponding to the dental arch of the CT image in the panoramic image according to a user manipulation signal input in the panoramic image; and
displaying a CT image in which the dental arch corresponding to the horizontal line is automatically adjusted to match the horizontal line adjustment of the panoramic image;
Panoramic image analysis method comprising a. The method of claim 6, wherein the displaying by adjusting the horizontal line comprises:
A panorama characterized in that by receiving a user manipulation signal, a predetermined horizontal coordinate (px) in the panoramic image corresponding to the dental arch of the CT image is moved to a new horizontal coordinate (px') in the front-rear direction, which is the z-axis direction. Mick image analysis method. The method of claim 1, wherein the analyzing the reconstructed panoramic image comprises:
A panoramic image analysis method, characterized in that the panoramic image before the change and the panoramic image changed through reconstruction are compared and analyzed. The method of claim 1, wherein the analyzing the reconstructed panoramic image comprises:
checking whether the panoramic image reconstructed by manipulation on the panoramic image is reconstructed into the panoramic image intended by the user; and
Analyzes the reconstructed panoramic image when it is reconstructed as the intended panoramic image, and additionally reconstructs and analyzes the panoramic image by manipulation on the panoramic image when it is not reconstructed as the intended panoramic image. step;
Panoramic image analysis method comprising a. The method of claim 1, wherein the panoramic image analysis method is
displaying a user guide interface for guiding operations on the panoramic image on the panoramic image;
Panoramic image analysis method, characterized in that it further comprises. a data acquisition unit for acquiring a tooth image including a CT image;
an input unit receiving a user manipulation signal;
a control unit for adjusting the vertical axis angle of the panoramic image without switching the screen to a multi-planar reconstruction screen composed of a CT image according to a user manipulation signal received from the input unit on the panoramic image generated from the CT image; and
an output unit for displaying a dental image including a panoramic image whose vertical axis angle is adjusted;
Dental image processing apparatus comprising a. 12. The method of claim 11, wherein the control unit
A dental image processing apparatus, characterized in that according to the vertical axis angle adjustment of the panoramic image, the vertical axis angle of the panoramic image and the corresponding CT image is automatically adjusted and displayed through the output unit. 12. The method of claim 11, wherein the control unit
A dental image processing apparatus, characterized in that the vertical axis angle is adjusted for each panoramic image of the maxilla and the panoramic image of the mandible in order to reconstruct the panoramic image of the maxillary and mandibular arches. 12. The method of claim 11, wherein the control unit
In the panoramic image, the horizontal line corresponding to the dental arch of the CT image is adjusted in the panoramic image according to the user manipulation signal received from the input unit on the panoramic image, and displayed through the output unit. A dental image processing apparatus, characterized in that the dental arch of the CT image is automatically adjusted and displayed through an output unit.

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