CN104299205A - X-ray image intensifier dental machine panorama generation method - Google Patents
X-ray image intensifier dental machine panorama generation method Download PDFInfo
- Publication number
- CN104299205A CN104299205A CN201310303242.3A CN201310303242A CN104299205A CN 104299205 A CN104299205 A CN 104299205A CN 201310303242 A CN201310303242 A CN 201310303242A CN 104299205 A CN104299205 A CN 104299205A
- Authority
- CN
- China
- Prior art keywords
- ray image
- image intensifier
- fusion
- dimensional data
- mold framework
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention relates to an X-ray image intensifier dental machine panorama generation method and belongs to the medical apparatus technology field. The method is characterized by comprising four steps that: step 1, three-dimensional data is generated by images acquired by an X-ray image intensifier; step 2, multiple frames of curved surface images are extracted in the three-dimensional data by utilizing a dental model framework; step 3, fusion of multi-frame images is carried out by utilizing a fusion method; step 4, the images after fusion are intensified by utilizing an intensifying method. The method is advantaged in that: the tooth curved surface tomography images can be extracted by utilizing the three-dimensional CT data, problems of deformation of the perspective images and overlapping are solved, and diagnosis precision is further improved.
Description
Technical field
The present invention relates to technical field of medical instruments, particularly relate to X ray type dental machine Panoramagram generation method, be specifically related to a kind of x ray image intensifier type dental machine Panoramagram generation method.
Background technology
At present, the efficient and convenient dirigibility of dental panoramic X-ray machine has extensively been used to dental diagnosis and shaping field by force, conventional dental panorama machine, it is the U-shaped curved surface track scanning according to tooth, obtain fluoroscopy images, carry out splicing synthesis panoramic picture, owing to being by fluoroscopy images composograph, so the panoramic picture generated and dentistry surface fault image exist the intrinsic overlap of fluoroscopy images, problem on deformation.
Conventional panoramic machine, the acquisition system of lift-launch mostly is flat panel detector acquisition system; Its reason is: first, there is the features such as distortion, brightness irregularities, circular image capturing range in image amplifier acquisition system, the complexity making image algorithm realize traditional dental panoramic increases substantially relative to flat panel detector, and picture quality can not show a candle to the image that flat panel detector acquisition system realizes; Secondly, because image amplifier volume ratio flat panel detector is large, this special track while scan of U-shaped curved surface of tooth, carry image amplifier acquisition system, the hardware cost of its kinematic system improves greatly.
Summary of the invention
The object of the invention is: based on a kind of Panoramagram generation method of the dentistry Cone-Beam CT of image amplifier acquisition system, its acquisition system track while scan is Circular test, relatively U-shaped curved surface scanning track decreases hardware cost, panoramic picture and surface fault is realized based on CT three-dimensional data, curved surface quantity can be changed according to actual needs, extract and reconstruction of three-dimensional volume data Tooth curved surface, solve fluoroscopy images distortion and overlap problem, improve the precision of diagnosis.
The technical scheme that the invention process adopts: the invention process provides a kind of image amplifier type dental machine Panoramagram generation method, specifically comprises:
1. with the Computer image genration three-dimensional data that x ray image intensifier acquisition system gathers, x ray image intensifier acquisition system acquisition sequence image, wherein, image amplifier acquisition system comprises: radiographic source bulb (2), image amplifier (3) and Circular test kinematic system (4); Sequence image is generated three-dimensional data by the FDK algorithm of application Cone-Beam CT Circular test.
2. draw tooth mold framework (1) central surface along the tooth sequence direction on three-dimensional data transversal section; According to the tooth sequence width on three-dimensional data transversal section, determine tooth mold framework (1) width; With a pixel for interval width, the centrally normal vector of curved surface, draw to organize the curved surface paralleled with central surface, these curved surfaces constitute tooth mold framework (1) more.
3. three-dimensional data transversal section, with on tooth mold framework (1) tray covered teeth section, tooth in tooth mold framework (1), as shown in Figure 4; Curved surface pixel coordinate and pixel value is extracted in tooth mold framework (1), through interpolation arithmetic, synthetic image; The multiple curved surface of tooth mold framework (1) extracts multiple image.
4. use weighted mean fusion method by frames fusion, concrete grammar comprises: multiple image registration, the pixel phase registration that each pixel of tooth mold framework (1) central surface and its normal obtain with other surface intersections; Multiple pixels of phase registration, are weighted average fusion.
5. use histogram equalization Enhancement Method by the image enhaucament after fusion.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of the inventive method.
Fig. 2 is the x ray image intensifier acquisition system of the inventive method.
Fig. 3 is the tooth mold framework of the inventive method.
Fig. 4 is tooth mold framework and the tooth position of fault figure of the inventive method.
Fig. 5 is the tooth sequence diagram of the transversal section of the inventive method.
Fig. 6 is the dental panoramic figure of the inventive method.
Embodiment
The invention process provides a kind of image amplifier type dental machine Panoramagram generation method, the three-dimensional data that the projection sequence that can be gathered by image amplifier acquisition system is generated, and obtains type dental machine panorama sketch by three-dimensional data.
As shown in Figure 1, concrete steps are as follows for method flow:
1. sequence image is generated three-dimensional data by the FDK algorithm applying Cone-Beam CT Circular test, and concrete grammar is as follows:
Reconstruction of three-dimensional volume data is
, then
, wherein,
for weight function,
for ray incident angle cosine,
for data for projection,
slope filtering convolution kernel, l, g, angle are the geometric parameter of projected image, and x, y, z are volume data pixel coordinate.
Generate tooth mold framework (1), specific implementation method is as follows:
Draw tooth mold framework (1) central surface along the tooth sequence direction on three-dimensional data transversal section, as shown in Figure 4, specific implementation method is:
Three-dimensional data transversal section along tooth sequence direction trace point range, the coordinate of recording body data mid point;
Enter regulation with spline method in curve point range interpolation to count, point range coordinate after recording interpolation;
In point range, consecutive point draw straight line, and record all straight-line segment equations, then these straight-line segment equations constitute center curve equation;
The center curve of all transversal section constitutes central surface.
According to the tooth sequence width on three-dimensional data transversal section, determine tooth mold framework (1) width; With a pixel for interval width step-length, the centrally normal vector of curved surface, draw to organize the curved surface paralleled with central surface, these curved surfaces constitute tooth mold framework (1), and tooth sequence as shown in Figure 5 more.Specific implementation method is:
With the vertical line direction of the straight-line segment of each interpolation point, a pixel is interval width step-length, draws multiple point, the some composition point range of identical step-length, and point adjacent in point range carries out connection straight line, forming curves;
Draw and organize the curve paralleled with center curve more;
The curve of all transversal section constitutes curved surface.
Curved surface constitutes tooth mold framework (1).
3. the multiple curved surface of tooth mold framework (1) extracts multiple image.Specific implementation method is:
A. interval in units of pixel, extracts central surface all pixel coordinates in three-dimensional data, through interpolation arithmetic, calculates the gray-scale value that pixel coordinate is corresponding, generating center image;
B. according to the method described above, extract the pixel coordinate of other curved surfaces, through interpolation arithmetic, calculate the gray-scale value that pixel coordinate is corresponding, generate multiple image.
By weighted mean fusion method by frames fusion, specific implementation method is:
A. central surface all pixels in three-dimensional data, the curve at place does vertical line, and these vertical lines are exactly the normal that central surface crosses pixel;
B. the pixel phase registration that obtains with other surface intersections of the pixel of central surface and its normal;
C. the pixel of phase registration is
, j is curved surface numbering, and u, v are image coordinate;
D. fused images is
, wherein
for fused images weight coefficient,
;
By histogram equalization Enhancement Method by the image enhaucament after fusion, specific implementation method:
A. the image after strengthening is:
, wherein
for image normalization cumulative histogram.
Said method is not only applicable to image amplifier dentistry CT machine, can also be applicable to flat panel detector dentistry CT machine, all can extract surface chart picture from CT three-dimensional data, generating panorama image.
In sum, the present invention is a kind of Panoramagram generation method of the dentistry Cone-Beam CT based on image amplifier acquisition system, and its acquisition system track while scan is Circular test, and relatively U-shaped curved surface scanning track decreases hardware cost.Realize panoramic picture and surface fault as shown in Figure 6 based on CT three-dimensional data, curved surface quantity can be changed according to actual needs, extract and reconstruction of three-dimensional volume data Tooth curved surface, solve fluoroscopy images distortion and overlap problem, improve the precision of diagnosis.
Claims (8)
1. an x ray image intensifier type dental machine Panoramagram generation method, is characterized in that: the method is divided into four steps to realize, and first step is the Computer image genration three-dimensional data gathered by x ray image intensifier acquisition system; Second step in three-dimensional data, extracts multiframe surface chart picture with tooth mold framework (1); 3rd step is by frames fusion by weighted mean fusion method; 4th step is by the image enhaucament after fusion by histogram equalization Enhancement Method.
2. a kind of x ray image intensifier type dental machine Panoramagram generation method as claimed in claim 1, it is characterized in that, the described Computer image genration three-dimensional data to the collection of x ray image intensifier acquisition system specifically comprises: x ray image intensifier acquisition system acquisition sequence image; Sequence image is generated three-dimensional data by the FDK algorithm of application Cone-Beam CT Circular test.
3. a kind of x ray image intensifier type dental machine Panoramagram generation method as claimed in claim 1, is characterized in that, described tooth mold framework (1) extracts multiframe surface chart picture in three-dimensional data, specifically comprises: generate tooth mold framework (1); Three-dimensional data transversal section, with on tooth mold framework (1) tray covered teeth section, tooth is in tooth mold framework (1); Curved surface pixel coordinate and pixel value is extracted in tooth mold framework (1), through interpolation arithmetic, synthetic image.
4. a kind of x ray image intensifier type dental machine Panoramagram generation method as claimed in claim 3, is characterized in that, generates tooth mold framework (1), specifically comprises: draw tooth mold framework (1) central surface along the tooth sequence direction on three-dimensional data transversal section; According to the tooth sequence width on three-dimensional data transversal section, determine tooth mold framework (1) width; With a pixel for interval width, the centrally normal vector of curved surface, draw to organize the curved surface paralleled with central surface, these curved surfaces constitute tooth mold framework (1) more.
5. a kind of x ray image intensifier type dental machine Panoramagram generation method as claimed in claim 1, is characterized in that, by weighted mean fusion method by frames fusion, specifically comprise: multiple image registration; Frames fusion.
6. a kind of x ray image intensifier type dental machine Panoramagram generation method as claimed in claim 5, it is characterized in that, multiple image registration, specifically comprises: the pixel phase registration that each pixel of tooth mold framework (1) central surface and its normal obtain with other surface intersections.
7. a kind of x ray image intensifier type dental machine Panoramagram generation method as claimed in claim 5, is characterized in that frames fusion specifically comprises: multiple pixels of phase registration, are weighted average fusion, obtain fused images.
8. a kind of x ray image intensifier type dental machine Panoramagram generation method as claimed in claim 1, is characterized in that, by histogram equalization Enhancement Method by the image enhaucament after fusion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310303242.3A CN104299205A (en) | 2013-07-19 | 2013-07-19 | X-ray image intensifier dental machine panorama generation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310303242.3A CN104299205A (en) | 2013-07-19 | 2013-07-19 | X-ray image intensifier dental machine panorama generation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104299205A true CN104299205A (en) | 2015-01-21 |
Family
ID=52318926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310303242.3A Pending CN104299205A (en) | 2013-07-19 | 2013-07-19 | X-ray image intensifier dental machine panorama generation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104299205A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104597061A (en) * | 2015-01-28 | 2015-05-06 | 中国工程物理研究院应用电子学研究所 | Large-field-of-view cone beam CT imaging method based on virtual detector |
| CN107507133A (en) * | 2017-09-13 | 2017-12-22 | 中国海洋石油总公司 | A kind of realtime graphic joining method based on pipe Work robot |
| CN110428879A (en) * | 2019-08-23 | 2019-11-08 | 重庆市劢齐医疗科技有限责任公司 | A kind of production method of the dynamic implantation operation designing report based on mobile terminal technology |
| CN115171079A (en) * | 2022-09-08 | 2022-10-11 | 松立控股集团股份有限公司 | Vehicle detection method based on night scene |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101393653A (en) * | 2008-10-16 | 2009-03-25 | 浙江大学 | Method for reconstructing three dimensional model of complete teeth through CT data of dentognathic gypsum model and dentognathic panoramic perspective view |
| CN102254317A (en) * | 2011-03-25 | 2011-11-23 | 苏州迪凯尔医疗科技有限公司 | Method for automatically extracting dental arch curved surface in dental implantation navigation |
| CN102609965A (en) * | 2012-02-13 | 2012-07-25 | 北京朗视仪器有限公司 | Data processing method of panoramagram generated by dental CBCT (cone beam computed tomography) |
| US20130022252A1 (en) * | 2011-07-21 | 2013-01-24 | Shoupu Chen | Panoramic image generation from cbct dental images |
-
2013
- 2013-07-19 CN CN201310303242.3A patent/CN104299205A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101393653A (en) * | 2008-10-16 | 2009-03-25 | 浙江大学 | Method for reconstructing three dimensional model of complete teeth through CT data of dentognathic gypsum model and dentognathic panoramic perspective view |
| CN102254317A (en) * | 2011-03-25 | 2011-11-23 | 苏州迪凯尔医疗科技有限公司 | Method for automatically extracting dental arch curved surface in dental implantation navigation |
| US20130022252A1 (en) * | 2011-07-21 | 2013-01-24 | Shoupu Chen | Panoramic image generation from cbct dental images |
| CN102609965A (en) * | 2012-02-13 | 2012-07-25 | 北京朗视仪器有限公司 | Data processing method of panoramagram generated by dental CBCT (cone beam computed tomography) |
Non-Patent Citations (1)
| Title |
|---|
| 胡海峰等: "锥束CT技术在口腔临床中的应用", 《CT理论与应用研究》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104597061A (en) * | 2015-01-28 | 2015-05-06 | 中国工程物理研究院应用电子学研究所 | Large-field-of-view cone beam CT imaging method based on virtual detector |
| CN104597061B (en) * | 2015-01-28 | 2017-10-31 | 中国工程物理研究院应用电子学研究所 | Big visual field cone-beam CT imaging method based on dummy detector |
| CN107507133A (en) * | 2017-09-13 | 2017-12-22 | 中国海洋石油总公司 | A kind of realtime graphic joining method based on pipe Work robot |
| CN107507133B (en) * | 2017-09-13 | 2021-04-13 | 中国海洋石油总公司 | Real-time image splicing method based on circular tube working robot |
| CN110428879A (en) * | 2019-08-23 | 2019-11-08 | 重庆市劢齐医疗科技有限责任公司 | A kind of production method of the dynamic implantation operation designing report based on mobile terminal technology |
| CN115171079A (en) * | 2022-09-08 | 2022-10-11 | 松立控股集团股份有限公司 | Vehicle detection method based on night scene |
| CN115171079B (en) * | 2022-09-08 | 2023-04-07 | 松立控股集团股份有限公司 | Vehicle detection method based on night scene |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103020928B (en) | The metal artifacts reduction method of cone-beam CT system | |
| KR101787119B1 (en) | Radiation image pickup device and image pickup method by radiation, and data processing device | |
| US8830309B2 (en) | Hierarchical processing using image deformation | |
| JP6130811B2 (en) | CT apparatus and method based on motion compensation | |
| JP6165809B2 (en) | Tomographic image generating apparatus, method and program | |
| CN105608747B (en) | A method of from three-dimensional dentistry conical beam CT extracting data panorama sketch | |
| US8320522B2 (en) | Method for creating a tomographic image | |
| JP2007089674A (en) | Shape of appearance measuring apparatus and x-ray ct apparatus | |
| KR20080002746A (en) | Dental extraoral x-ray imaging system and method | |
| WO2011158893A1 (en) | X-ray ct device and control method for same | |
| CN104299205A (en) | X-ray image intensifier dental machine panorama generation method | |
| CN106852697A (en) | Radioscopic image acquisition methods and device | |
| JP2013517045A5 (en) | ||
| CN103065322A (en) | Two dimensional (2D) and three dimensional (3D) medical image registration method based on double-X-ray imaging | |
| JPH01119786A (en) | Generation of shaded image | |
| JP4458309B2 (en) | 3D image display device | |
| CN106551701B (en) | Wireless flat panel detector and image correction method thereof | |
| JP2022516487A (en) | 3D segmentation of mandible and maxilla | |
| JP2016064118A (en) | Tomographic image generating device, method and program | |
| CN103767723A (en) | Cone beam CT three-dimensional digital imaging method based on C-shaped arm | |
| JP5231959B2 (en) | X-ray CT imaging apparatus and signal processing method thereof | |
| Li et al. | X-ray digital intra-oral tomosynthesis for quasi-three-dimensional imaging: system, reconstruction algorithm, and experiments | |
| CN104361567A (en) | Lung 4D-CT image inhaling process middle phase image reconstruction method based on registration | |
| CN110353716B (en) | Digital domain decomposition method in dual-energy CT short-range scanning protocol | |
| JPH09164133A (en) | X-ray camera |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 211112 Jiangning, Jiangsu Province, open source road, No. 168, No. Applicant after: NANJING PERLOVE MEDICAL EQUIPMENT CO., LTD. Address before: 211112 Jiangning, Jiangsu Province, open source road, No. 168, No. Applicant before: Nanjing Perlove Radial-video Equipment Co., Ltd. |
|
| COR | Change of bibliographic data | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150121 |
|
| WD01 | Invention patent application deemed withdrawn after publication |