CN1556504A - CT medical imaging method - Google Patents
CT medical imaging method Download PDFInfo
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- CN1556504A CN1556504A CNA2004100157324A CN200410015732A CN1556504A CN 1556504 A CN1556504 A CN 1556504A CN A2004100157324 A CNA2004100157324 A CN A2004100157324A CN 200410015732 A CN200410015732 A CN 200410015732A CN 1556504 A CN1556504 A CN 1556504A
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Abstract
The invention relates to a CT medicinal video imaging method, using a personal computer to read the CT-scanned data file information and body data, extracting bone tissue pixels and skin pixels from the body data, calculating normal vectors of equivalent surfaces of the bone and the skin, setting colors and transparencies of the bone and the skin, then adding them in a view window to form a complete image. It can complete developing, reconstructing, measuring, analyzing, operation designing, and result previewing and analyzing of 3D CT video data on a PC, thus making the computer-based operation design have flexibility, convenience and quickness, and operability all the more.
Description
Technical field
The present invention relates to a kind of medical image formation method, particularly a kind of CT medical image formation method that can carry out personalized analysis to image.
Background technology
Present medical image formation method generally is to be undertaken by scanning and the imaging system of spiral three-dimensional CT, at first the scanning by spiral three-dimensional CT comes image data, then these data are set up the medical 3 D electron image by large-scale workstation, and relevant three-dimensional data can be carved into common CD and preserve.This method forms medical image, three-D CT imaging and analytical work at present must be by large-scale workstation.The analysis of the expensive workstation of this dependence, cost height not only, and be not easy to the surgeon flexibly, independently each concrete case is carried out personalized measurement, design and surgical simulation.
Another method is the image film that the X-ray two-dimensional measurement obtains two dimension, then by pixel stacking image technology, the image film of two dimension can be set up 3-D view after scanning.But it is accurate that two-dimensional measurement can not show a candle to three-dimensional measurement, can't carry out surgical simulation truly simultaneously.By film scanning two dimensional image is converted into 3-D view, it or not electronic image, the accuracy of its information integrity and Measurement and analysis all can't be compared with the result of CT workstation, and the later stage patch work of carrying out at film scanning: work such as noise filtering, framing and coupling also have suitable difficulty.This non-interactive mode is unfavorable for that the doctor can carry out perceptual comprehension and exchange before operation with the patient at postoperative effect, reaches common understanding.
Summary of the invention
The object of the present invention is to provide a kind of CT medical image formation method, to overcome above-mentioned the deficiencies in the prior art, make the image data of three dimensional CT can on PC, finish video picture, reorganization, measurement, analysis and operation designing, result's preview and analysis, thereby make the computing machine operation designing have more dirigibility, convenience and operability.
For achieving the above object, the invention provides a kind of CT medical image formation method, it comprises: a utilizes personal computer to read the data file information of CT scan; B reads volume data; C extracts bone tissue pixel and skin pixels respectively from volume data; D calculates bone and skin contour surface normal vector respectively; E is provided with color, the transparency of bone and skin respectively; F adds form respectively and forms complete image.
Another object of the present invention is to provide a kind of CT medical image formation method that forms level, crown, sagittal plane section collection.CT medical image formation method according to this purpose comprises the steps that a utilizes personal computer to read the data file information of CT scan; B reads volume data; C is provided with interpolative mode; D is provided with heavy slicing parameter; E calculates generation level, crown, sagittal plane section collection respectively according to interpolative mode and slicing parameter.
Another purpose of the present invention is to provide a kind of CT medical image formation method that shows and measure the image data of two-dimensional ct.CT medical image formation method according to this purpose comprises the steps: that a utilizes personal computer to read the data file information of CT scan; B reads the section pixel data; C shows two dimensional image on personal computer monitor; D utilizes the PC image processing function that two dimensional image is adjusted e and measures various data between the two dimensional image pixel.
The dependence of CT workstation has been broken away from the foundation of PC three-D CT imaging and analytic system, has reduced job costs, makes the plastic surgeon flexibly, independently carry out measurement, design and the surgical simulation of personalization to each concrete case.The application of interactive mode helps the doctor can be carried out perceptual comprehension and exchange before operation with the patient at postoperative effect, reaches common understanding.The realization of three-dimensional measurement, to have established the foundation of base image be that conversion by the three dimensional CT data obtains in order to set up truly surgical simulation, be electronic image truly, asemantic to lose with the accuracy of Measurement and analysis be consistent with the result of CT workstation.
The present invention is further illustrated below in conjunction with accompanying drawing and embodiment.
Description of drawings
Fig. 1 forms the process flow diagram of 3-dimensional image for the present invention.
Fig. 2 forms the process flow diagram of level, crown, sagittal plane section collection for the present invention.
Fig. 3 shows and measures the process flow diagram of bidimensional image for the present invention.
Embodiment
Relevant detailed description of the present invention and technology contents, existing as follows with regard to accompanying drawings:
At first consult Fig. 1, this is the process flow diagram that the present invention forms 3-dimensional image.Personal computer just begins read data files information 11 after the input file title, this category information is the information about the document format data aspect, include: file name pattern, quantity of documents, image documentation equipment type, data memory format, section pel spacing, section sheet interlayer spacing, the file name pattern here is meant the definition rule of preserving serial medical image data filename; The section pel spacing is meant that every section constitutes by a large amount of equidistantly pixels, arbitrarily the distance between adjacent two pixels; The section sheet interlayer spacing is meant that medical image is made of the equally spaced section of multilayer, arbitrarily the distance between adjacent two sections.After having read these corresponding document format data information, the mode that personal computer is just established according to these document format datas reads volume data 12.After having read in volume data, because skin has different characteristics with bone, for example, the gray-scale value difference of the two pixel.Therefore the present invention extracts skin and bone tissue pixel respectively from the volume data that reads, and promptly extracts bone tissue pixel 13 and extracts skin pixels 13.After skin and bone tissue pixel extracted respectively, computing machine just can be according to corresponding algorithm, surface rendering reconstruction algorithm etc. for example, bone contour surface normal vector 14 and skin contour surface normal vector 14 have been calculated respectively, the contour surface normal vector here is meant by equal gray-scale value and constitutes contour surface that the normal line vector on this curved surface is called the contour surface normal vector.Just the image of bone and skin can have been built up enough in conjunction with the volume data of reading in and the bone and the skin normal vector numerical value that calculate, according to these numerical value color, the transparency 15 of color, transparency and the skin of bone are set respectively, again these are set and add form respectively and just on display, shown complete 3-D view 16.In one embodiment, the three-dimensional space data file that adopts in read data files information 11 these steps is the electronic document of exporting from medical imaging devices such as CT, and the document is DICOM 3.0 international standard forms.In the present embodiment, the visualized algorithm of three-dimensional space data field adopts classical surface rendering algorithm.In above-mentioned three-dimensional reconstruction module, the GUI of the Marching Cubes algorithm of classics and the OpenGL program in the PC computing machine, Windows operating system is combined, can make full use of the existing programmable characteristics of video card, thereby reach the purpose that the accelerogram picture generates and shows.Simultaneously, adopted the multiple-level surface rendering technique, can show bone tissue and soft tissue simultaneously,, and color and transparency can be set respectively, formed pseudo color image with aerial perspective as skin etc.
See also Fig. 2, this is the process flow diagram that the present invention forms level, crown, sagittal plane section collection.Personal computer just begins read data files information 21 after the input file title, this category information is about the information of document format data aspect, includes: file name pattern, quantity of documents, image documentation equipment type, data memory format, section pel spacing, section sheet interlayer spacing.After having read these corresponding document format data information, the mode that personal computer is just established according to these document format datas reads volume data 22.After having read in volume data, according to the requirement difference of the face section that generates, carry out interpolative mode and be provided with 23, these interpolative mode have respectively: the closest approach interpolation, promptly by from the value of closest approach as new interpolated value; Linear interpolation is promptly carried out numerical value and the cubic interpolation that linear interpolation obtains by the value at interpolation point two ends, carries out the numerical value that linear interpolation obtains respectively by 8 points around the interpolation point.Next heavy slicing parameter 24 is set, and so-called heavy slicing parameter is meant the parameter that needs setting in order to cut into slices again, as parameters such as interpolation in-plane, interpolation quantity, sheet interlayer spacings.Surface level section, coronal-plane section and sagittal plane section 25 just can have been generated respectively according to the volume data of reading in and interpolative mode that sets and heavy slicing parameter computing machine.
In above-mentioned module, utilize a series of CT sheet layer data, generate the series data on other two groups of planes, just generate coronal-plane and sagittal series data with surface level sheet layer data.This generating algorithm is to generate under the condition of not carrying out the three-dimensional reconstruction stereo-picture, so its formation speed is fast.Simultaneously, in specific implementation process, provide three kinds of interpolation arithmetic patterns, selected for the user.
See also Fig. 3, this is the process flow diagram that the present invention shows and measure bidimensional image.Personal computer just begins read data files information 31 after the input file title, this category information is about the information of document format data aspect, includes: file name pattern, quantity of documents, image documentation equipment type, data memory format, section pel spacing, section sheet interlayer spacing.After having read these corresponding document format data information, the mode that personal computer is just established according to these document format datas reads section pixel data 32.Just can show two-dimensional slice image 33 according to these numerical computers, next computing machine just can utilize its graphics processing function that the two-dimensional slice image that shows is adjusted 34.These adjustment comprise: the dwindling and amplify of image rotation, detrusion, image inverse, gray scale adjustment, brightness adjustment, contrast adjustment, window adjustment, the adjustment of window position and image.Because the image here all is to derive from data file but not to the scanning of film, so computing machine is easy to just can measure 35 to all places on the image and distance, and this class measurement mainly is to the measurement of air line distance and the measurement of angle angle.Also comprise in certain embodiments the computer-readable image file format of other types is preserved and be converted into to these image files, as tif, gif etc.
Above embodiment of the present invention provides a series of two dimensions and 3-D view processing capacity for the doctor.The major function that two dimensional image is handled has: the measurement of the convergent-divergent of CT image, rotation, detrusion, inverse, gray scale adjustment, brightness adjustment, window and the adjustment of window position, length and angle and be functions such as tiff image with the DICOM image transitions.The 3-D view preprocessing function mainly is that original CT image series is carried out subdivision again, rebuilds the two dimensional image of surface level, sagittal plane and coronal-plane, and the size of subdivision and pel spacing all can be adjusted flexibly.The major function that 3-D view is handled mainly contains: high-precision three-dimensional resurfacing, the convergent-divergent of said three-dimensional body, rotation, subdivision, color adjustment, length, area and cubing.
One of example application of these embodiment is to set up the three dimensional analysis of craniomaxillofacial surgery personalization, measures and surgery simulation system.The dependence of CT workstation has been broken away from the foundation of PC three-D CT imaging and analytic system, has reduced job costs, makes the plastic surgeon flexibly, independently carry out measurement, design and the surgical simulation of personalization to each concrete case.The application of interactive mode helps the doctor can be carried out perceptual comprehension and exchange before operation with the patient at postoperative effect, reaches common understanding.The realization of three-dimensional measurement is for the surgical simulation of setting up has truly been established the basis.The foundation of image is that the conversion by the three dimensional CT data obtains, and is electronic image truly, and asemantic to lose with the accuracy of Measurement and analysis be consistent with the result of CT workstation.
Above introduce, it only is preferred embodiment of the present invention, can not limit scope of the invention process with this, i.e. the variation that is equal to done according to the present invention of those skilled in the art in the present technique field is for example carried out combination and variation with three function groups among the above embodiment.And those skilled in that art improvement, the variation known, all should still belong to the scope that patent of the present invention contains.
Claims (6)
1, a kind of CT medical image formation method, it is characterized in that it may further comprise the steps: a utilizes personal computer to read the data file information of CT scan; B reads volume data; C extracts bone tissue pixel and skin pixels respectively from volume data; D calculates bone and skin contour surface normal vector respectively; E is provided with color, the transparency of bone and skin respectively; F adds form respectively and forms complete image.
2, CT medical image formation method according to claim 1 is characterized in that this method also comprises the measurement of the image of finishing being carried out length, area, volume and angle.
3, CT medical image formation method according to claim 1 is characterized in that this method also comprises the image of finishing is adjusted.
4, a kind of CT medical image formation method, it is characterized in that it may further comprise the steps: a utilizes personal computer to read the data file information of CT scan; B reads volume data; C is provided with interpolative mode; D is provided with heavy slicing parameter; E calculates generation level, crown, sagittal plane section collection respectively according to interpolative mode and slicing parameter.
5, a kind of CT medical image formation method, it is characterized in that it may further comprise the steps: a utilizes personal computer to read the data file information of CT scan; B reads the section pixel data; C shows two dimensional image on personal computer monitor; D utilizes the PC image processing function that two dimensional image is adjusted; E measures the various data between the two dimensional image pixel.
6, according to the described CT medical image of claim 1 to 6 formation method, the data file that it is characterized in that described CT scan is a DICOM international standard format file.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2004100157324A CN1556504A (en) | 2004-01-09 | 2004-01-09 | CT medical imaging method |
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| CNA2004100157324A CN1556504A (en) | 2004-01-09 | 2004-01-09 | CT medical imaging method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103377480A (en) * | 2012-04-12 | 2013-10-30 | 刘业东 | Medical image imaging system |
| TWI834115B (en) | 2022-01-28 | 2024-03-01 | 采風智匯股份有限公司 | Method for processing and displaying a skeleton image |
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2004
- 2004-01-09 CN CNA2004100157324A patent/CN1556504A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103377480A (en) * | 2012-04-12 | 2013-10-30 | 刘业东 | Medical image imaging system |
| TWI834115B (en) | 2022-01-28 | 2024-03-01 | 采風智匯股份有限公司 | Method for processing and displaying a skeleton image |
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