KR20160060574A - Apparatus and method for reconstructing three dimensional images using dental ct images - Google Patents
Apparatus and method for reconstructing three dimensional images using dental ct images Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 68
- 238000009877 rendering Methods 0.000 claims abstract description 26
- 210000004373 mandible Anatomy 0.000 claims description 21
- 210000002050 maxilla Anatomy 0.000 claims description 18
- 238000004590 computer program Methods 0.000 claims description 4
- 238000003384 imaging method Methods 0.000 claims 2
- 238000002591 computed tomography Methods 0.000 description 78
- 210000000988 bone and bone Anatomy 0.000 description 13
- 230000003239 periodontal effect Effects 0.000 description 12
- 230000006870 function Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 4
- 210000003689 pubic bone Anatomy 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 238000002513 implantation Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000002096 quantum dot Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000037182 bone density Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000000205 computational method Methods 0.000 description 1
- 239000002772 conduction electron Substances 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000001815 facial effect Effects 0.000 description 1
- 210000004195 gingiva Anatomy 0.000 description 1
- 210000001847 jaw Anatomy 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 210000000276 neural tube Anatomy 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 210000004357 third molar Anatomy 0.000 description 1
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- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computed tomography [CT]
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/46—Arrangements for interfacing with the operator or the patient
- A61B6/461—Displaying means of special interest
- A61B6/466—Displaying means of special interest adapted to display 3D data
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/52—Devices using data or image processing specially adapted for radiation diagnosis
- A61B6/5211—Devices using data or image processing specially adapted for radiation diagnosis involving processing of medical diagnostic data
- A61B6/5217—Devices using data or image processing specially adapted for radiation diagnosis involving processing of medical diagnostic data extracting a diagnostic or physiological parameter from medical diagnostic data
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T15/00—3D [Three Dimensional] image rendering
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Abstract
Description
Embodiments of the present invention relate to a method and apparatus for reconstructing a three-dimensional image of a dentistry, and more particularly, to a method and apparatus for reconstructing a three-dimensional image using dental CT images capable of reconstructing a three- And a method and apparatus for reconstructing a 3D image.
In general, the success of dental practice depends on many variables. For example, in the case of the implantation of the pubic bone, the location of the neural tube, the structure of the upper and lower malleolus, the bone density, the appropriate position and the choice of the fixture, and the harmony with the prosthesis can be considered as the main parameters related to the success of the procedure. The above-mentioned variables are closely related to the success of the dental medical practice and should be considered in the process of establishing the procedure plan.
In the conventional dentistry, after considering the above-mentioned parameters based on the information obtained from the two-dimensional CT images obtained through computed tomography (CT), a procedure plan is established. However, since the two-dimensional CT images each provide only two-dimensional information to the procedure planner (for example, the practitioner), the two- Although the practitioner has a lot of clinical experience, it is difficult to confirm the shape of the pubic bone formed by the patient's maxilla and mandible, the volume and the cubic feeling of each part of the pubic bone with the procedure plan information established based on the two-dimensional CT images. In addition, the shape, volume, and cubic feel of the structure are different for each patient to be treated.
Therefore, it is necessary to develop a technique that can provide a three - dimensional image representing the symphysis pubis and anatomical information of the patient, thereby increasing the success rate of the procedure based on a procedure plan established using conventional two - dimensional CT images.
An embodiment of the present invention provides a method and apparatus for reconstructing a three-dimensional image using dental CT images capable of providing the pubic shape and anatomical information of a patient.
In addition, embodiments of the present invention provide a method and apparatus for reconstructing a three-dimensional image using dental CT images capable of providing three-dimensional images of teeth, periodontals, alveolar bone, maxillary bone, and mandible.
In addition, embodiments of the present invention can provide a three-dimensional image similar to a patient's actual dental environment rather than the MIP (maximum intensity projection) technique and the minP (minimum intensity projection) A method and apparatus for reconstructing a three-dimensional image using CT images are provided.
According to another aspect of the present invention, there is provided a method of reconstructing a three-dimensional image using dental CT images, the method comprising: receiving a two-dimensional CT image information generated by capturing a CT image of a patient from an external CT electronic device; Reconstructing image information representing a tooth structure using a curved planar reconstruction method on the 2-dimensional CT image information; Generating three-dimensional image information by rendering the three-dimensional image rendering unit based on the reconstructed image information; And displaying the 3D image information so that the user can recognize the 3D image information.
Reconstructing the image information comprises: constructing a fundamental curve along the maxilla or mandible; And setting a plane orthogonal to the fundamental curve.
The step of constructing the basic curve may include: building a foundation curve along the maxilla or mandible; Setting a city center for each tooth; And modifying the base curve to pass through the set city center to construct a final curve.
Polynomial Curve Fitting can be used to construct the fundamental and final curves.
In the step of setting the curved surfaces, a plurality of curved surfaces may be set at regular intervals at intervals along the final curve, and the image information representing the tooth structure may be reconstructed along the plurality of curved surfaces.
A computer program according to an embodiment of the present invention may be stored in a medium for causing the computer to execute the method.
Also, the apparatus for reconstructing a three-dimensional image using dental CT images according to an embodiment of the present invention includes a CT image receiving unit for receiving 2-dimensional CT image information obtained by photographing a patient from an external CT electronic apparatus; A curved surface reconstruction processing unit for reconstructing image information representing a tooth structure by using a curved planar reconstruction method on the two-dimensional CT image information; And a three-dimensional image rendering unit for generating three-dimensional image information through rendering based on the reconstructed image information.
Wherein the curved surface reconstruction processing unit is configured to construct a basic curve along the maxilla or mandible, set the center of each tooth, modify the basic curve to pass through the set center, construct a final curve, The image information representing the tooth structure can be reconstructed along the flat surface.
According to the embodiment of the present invention, it is possible to provide a three-dimensional image which can be continuously observed in real time.
According to the embodiment of the present invention, the three-dimensional image is reconstructed by dividing the plane into curved surfaces in accordance with the features of the curved upper and lower facial features, thereby reconstructing the patient's tooth environment accurately in a three-dimensional image than in the conventional MIP and minP methods can do.
1 is a block diagram illustrating an apparatus for reconstructing a three-dimensional image using dental CT images according to an embodiment of the present invention.
2 is a flowchart illustrating a method of reconstructing a three-dimensional image using dental CT images according to an embodiment of the present invention.
3 is a reference diagram of a reconstruction step of a three-dimensional image using dental CT images according to an embodiment of the present invention.
4 is an exemplary detailed flowchart of a tooth structure reconstruction step according to another embodiment of the present invention.
5 to 8 are reference views of the respective steps shown in Fig.
9 is a diagram illustrating a reconstruction result of a three-dimensional image using dental CT images according to an embodiment of the present invention.
Hereinafter, exemplary embodiments according to the present invention will be described in detail with reference to the contents described in the accompanying drawings. However, the present invention is not limited to or limited by the exemplary embodiments. Like reference numerals in the drawings denote members performing substantially the same function.
While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. Also, in certain cases, there may be a term selected arbitrarily by the applicant, in which case the meaning thereof will be described in detail in the description of the corresponding invention. Therefore, the term used in the present invention should be defined based on the meaning of the term, not on the name of a simple term, but on the entire contents of the present invention.
When an element is referred to as "including" an element throughout the specification, it is to be understood that the element may include other elements as well, without departing from the spirit or scope of the present invention. Also, the terms "...... "," module ", etc. in the specification mean units for processing at least one function or operation, which may be implemented in hardware or software or a combination of hardware and software .
The storage unit according to an embodiment of the present invention includes all kinds of recording media in which programs and data are stored so that they can be read by a computer system. Examples of the storage medium include ROM (Read Only Memory), RAM (Random Access Memory), CD (Compact Disk), DVD (Digital Video Disk) -ROM, magnetic tape, floppy disk, optical data storage, A card (eMMC), a hard disk drive (HDD), a micro SD card, and a USB memory. Also, the storage unit according to an embodiment of the present invention may include a carrier wave (for example, transmission via the Internet).
A display unit according to an exemplary embodiment of the present invention may include a display unit including an ELD, a vacuum fluorescent display (VFD), a light emitting diode display (LED), a cathode ray tube (CRT), a liquid crystal display (LCD), a thin film transistor liquid crystal display (TFT LCD) , A plasma display panel (PDP), a surface alternate lighting (ALiS), a digital light source treatment (DLP), a silicon liquid crystal (LCoS), an organic light emitting diode (OLED), a surface conduction electron emitting device display (SED) (TDEL), a quantum dot display (QD-LED), a telescopic pixel display (FED), a laser TV (quantum dots laser, a liquid crystal laser), a photodetector liquid display (FLD), an interferometer modulator display (iMoD) (TPD), an organic light emitting transistor (OLET), and a laser fluorescent display (LPD).
An apparatus for reconstructing a three-dimensional image using dental CT images according to an embodiment of the present invention may be any electronic apparatus having a display unit. For example, the electronic device may include at least one of a smart phone, a mobile phone, a notebook computer, a laptop computer, a tablet computer, a Personal Media Player (PMP), and a Personal Digital Assistants (PDA). Further, the electronic device according to the embodiment of the present invention may be a flexible device or a flexible display device.
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily carry out the present invention.
Hereinafter, a method and apparatus for reconstructing a three-dimensional image using dental CT images according to an embodiment of the present invention will be described with reference to the accompanying drawings.
1 is a block diagram illustrating an apparatus for reconstructing a three-dimensional image using dental CT images according to an embodiment of the present invention. Referring to FIG. 1, an
The CT
As another example, the CT
Also, CT information may be received from the storage device storing the CT image.
Thereafter, the CT
The CT
The curved surface
More specifically, the curved surface
In addition, the curved surface
For example, the curved surface
The curved surface
The 3D
More specifically, the three-dimensional
Thereafter, the three-dimensional
The
In addition, the
Meanwhile, each component of the
In this specification, each function means a functional and structural combination of hardware for carrying out the technical idea of the present invention and software for driving the hardware. For example, each functional unit may refer to a logical unit of a predetermined code and a hardware resource for executing the predetermined code, and may be a code physically connected to the functional unit, But can be easily deduced to the average expert in the field of the invention.
FIG. 2 is a flowchart illustrating a method of reconstructing a three-dimensional image using dental CT images according to an embodiment of the present invention.
2, a CT
In addition, the CT
Then, the curved surface
The reconstruction of the image information by the curved surface
In addition, the step of performing the reconstruction calculation may further include a step of reconstructing a curve divided into planes on various surfaces of each object so as to match the features of each of the teeth, the periodontal bone, the periodontal bone, the maxillary bone, and the mandible .
This will be described in more detail with reference to FIG. 3 to FIG.
The curved surface
The
Next, a
Since the position of the teeth varies from person to person, a curve that can accurately define the individual tooth position can be derived by deriving the initial curve as a final curve based on the center of the city.
Next, a curved surface is set along the final curve (S224).
7, the curved surface
The reconstructed image information may be transmitted to the 3D
For example, the 3D
In addition, in the 3D rendering step, the 3D
The three-dimensional
An exemplary three-dimensional image reconstructed in accordance with an embodiment of the present invention is shown in FIG.
The maximum intensity projection (MIP) method and the minP (min intensity projection) method, which are conventional computational methods for reconstructing a medical three-dimensional image, are classified into 3 methods, which are defined as axial, sagittal and coronal The MIP method takes the maximum brightness value and the mimP method takes the minimum brightness value when the projection line passes through a certain view point by collecting images of the vertical plane. However, in the conventional methods, when a slice thickness or a point of a slice is several times the size of one pixel of the resultant image, a low-quality image is a concern.
However, since the reconstructed three-dimensional image is reconstructed using the reconstruction method of the three-dimensional image using the dental CT images according to the embodiment of the present invention, as shown in FIG. 8, Compared with the three-dimensional image generated by the image reconstruction method, a three-dimensional image having smoothness and high accuracy can be derived.
In addition, a method of reconstructing a three-dimensional image using dental CT images according to an embodiment of the present invention includes constructing a basic curve along the maxilla and mandible, defining a center for each tooth and forming a final curve along the point Therefore, it is possible to accurately define different tooth positions for each individual. As a result, the accuracy of the observation of a specific tooth area increases, and structures that could not be seen in reconstructed images by conventional methods may be seen.
In the case of a third molar called lover, among the dental treatment procedures, it may have the form of an implanted or lying in the alveolar bone and the gingiva. This may cause image distortion when CT images are taken. In such a case, distortion of the structure can be reduced by using the structure reconstruction method according to the present invention. In addition, procedures such as implantation that require a plan of operation through medical images can be reconstructed without distorting not only the teeth but also the alveolar bone, thereby increasing the success rate of the procedure.
The method according to one embodiment of the present invention has been described with reference to the flowchart shown in the drawings. While the above method has been shown and described as a series of blocks for purposes of simplicity, it is to be understood that the invention is not limited to the order of the blocks, and that some blocks may be present in different orders and in different orders from that shown and described herein And various other branches, flow paths, and sequences of blocks that achieve the same or similar results may be implemented. Also, not all illustrated blocks may be required for implementation of the methods described herein.
Furthermore, the method according to an embodiment of the present invention may be implemented in the form of a computer program for performing a series of processes, and the computer program may be recorded on a computer-readable recording medium.
The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions recorded on the medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.
It will also be appreciated that embodiments of the present invention may be implemented in hardware, software, or a combination of hardware and software. Such arbitrary software may be stored in a memory such as, for example, a volatile or non-volatile storage device such as a storage device such as ROM or the like, or a memory such as a RAM, a memory chip, a device or an integrated circuit, , Or a storage medium readable by a machine (e.g., a computer), such as a CD, a DVD, a magnetic disk, or a magnetic tape, as well as being optically or magnetically recordable. It will be appreciated that the storage that may be included in the portable terminal is an example of a machine-readable storage medium suitable for storing programs or programs including instructions for implementing the embodiments of the present invention. Accordingly, the present invention includes a program including code for implementing the apparatus or method as claimed in any of the claims, and a machine-readable storage medium storing such a program. In addition, such a program may be electronically transported through any medium such as a communication signal transmitted via a wired or wireless connection, and the present invention appropriately includes the same.
While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. Therefore, the scope of the present invention should not be limited by the described embodiments but should be determined by the equivalents of the claims and the claims.
100: 3D reconstruction device using dental CT images
110: CT image receiving unit 120:
130: control unit 131: surface reconstruction processing unit
132: three-dimensional image rendering unit 140:
310: Foundation curve 320: Urban
330: final curve 340:
Claims (8)
Reconstructing image information representing a tooth structure using a curved planar reconstruction method on the 2-dimensional CT image information;
Generating three-dimensional image information by rendering the three-dimensional image rendering unit based on the reconstructed image information; And
Displaying the three-dimensional image information so that a user can recognize the three-dimensional image information;
A method of reconstructing a three-dimensional image using dental CT images.
The step of reconstructing the image information
Constructing a basic curve along the maxilla or mandible; And
Setting a plane orthogonal to the fundamental curve;
A method of reconstructing a three-dimensional image using dental CT images.
The step of constructing the base curve
Constructing a base curve along the maxilla or mandible;
Setting a city center for each tooth; And
Constructing a final curve by modifying the foundation curve to pass through a set urban center;
A method of reconstructing a three-dimensional image using dental CT images.
A method of reconstructing a three-dimensional image using dental CT images using a Polynomial Curve Fitting to construct the basis curve and the final curve.
Wherein a plurality of planes are set at regular intervals along the final curve in the setting of the planes,
A method of reconstructing a three-dimensional image using dental CT images reconstructing image information representing a tooth structure along the plurality of planes.
A curved surface reconstruction processing unit for reconstructing image information representing a tooth structure by using a curved planar reconstruction method on the two-dimensional CT image information; And
A three-dimensional image rendering unit for generating three-dimensional image information through rendering based on the reconstructed image information;
Dimensional image reconstruction apparatus using dental CT images.
The curved surface reconstruction processing unit may be configured to construct a basic curve along the maxilla or mandible, set the center of each tooth, modify the basic curve to pass through the set center, construct a final curve, A 3D image reconstruction device using dental CT images reconstructing image information representing a tooth structure along a plane.
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Cited By (11)
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| KR101953629B1 (en) * | 2017-11-21 | 2019-03-05 | 서울여자대학교 산학협력단 | Method and apparatus for automatic segmentation of the mandible using shape-constrained information in cranio-maxillo-facial cbct images |
| KR20190090663A (en) * | 2018-01-25 | 2019-08-02 | (주)바텍이우홀딩스 | Method of automatically generating a curve corresponding to an dental arch shape on dental ct slice automatically selected from three dimensional dental ct image |
| KR20200019016A (en) * | 2018-08-13 | 2020-02-21 | 오스템임플란트 주식회사 | Method and apparatus for generating panoramic image, computer-readable recording medium based on 2D image registration and 3D image reconstruction |
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| KR101146862B1 (en) * | 2010-12-02 | 2012-05-16 | 이준호 | Method to change from two-dimensional panorama picture to three-dimensional picture and the recorded media thereof |
| US20120258416A1 (en) * | 2011-04-08 | 2012-10-11 | Hongsheng Tong | Method to define, measure, and display mesiodistal angulation and faciolingual inclination of each whole tooth |
| KR101366341B1 (en) * | 2012-02-15 | 2014-02-24 | 계명대학교 산학협력단 | A method for automatic identification of lumen border in intravascular ultrasound images using non-parametric probability model and smo0thing function |
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| KR101953629B1 (en) * | 2017-11-21 | 2019-03-05 | 서울여자대학교 산학협력단 | Method and apparatus for automatic segmentation of the mandible using shape-constrained information in cranio-maxillo-facial cbct images |
| KR20190090663A (en) * | 2018-01-25 | 2019-08-02 | (주)바텍이우홀딩스 | Method of automatically generating a curve corresponding to an dental arch shape on dental ct slice automatically selected from three dimensional dental ct image |
| KR20200019016A (en) * | 2018-08-13 | 2020-02-21 | 오스템임플란트 주식회사 | Method and apparatus for generating panoramic image, computer-readable recording medium based on 2D image registration and 3D image reconstruction |
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| KR20200134036A (en) * | 2019-05-21 | 2020-12-01 | 오스템임플란트 주식회사 | Method for numbering teeth number and image processing apparatus for performing the method |
| KR20210055436A (en) * | 2019-11-07 | 2021-05-17 | 부산대학교 산학협력단 | Individualized Dental Panorama System using Arch Shape and Method for Controlling the same |
| WO2022145557A1 (en) * | 2020-12-30 | 2022-07-07 | 이마고웍스 주식회사 | Method for automatically segmenting maxillofacial bones in ct image by using deep learning |
| KR20220106554A (en) * | 2021-01-22 | 2022-07-29 | 오스템임플란트 주식회사 | Apparatus And Method For Generating Panoramic Images Using CT Images |
| WO2022250403A1 (en) * | 2021-05-24 | 2022-12-01 | 주식회사 메디트 | Electronic device and image processing method therefor |
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