CN100464705C - Invented eversion type 3-D external viewing method for cavity organ internal wall - Google Patents
Invented eversion type 3-D external viewing method for cavity organ internal wall Download PDFInfo
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- CN100464705C CN100464705C CNB2006100266640A CN200610026664A CN100464705C CN 100464705 C CN100464705 C CN 100464705C CN B2006100266640 A CNB2006100266640 A CN B2006100266640A CN 200610026664 A CN200610026664 A CN 200610026664A CN 100464705 C CN100464705 C CN 100464705C
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Abstract
The present invention relates to a hollow organ inner wall virtual everted three-dimensional external viewing method, belonging to the field of image processing technology. Said method includes the following steps: firstly, obtaining medical original image, pretreating and dividing said image, respectively extracting inner wall surface of required hollow organ and reference face for making eversion treatment, then everting the data of inner wall surface to the outer side of reference face by adopting mirror-image mode, finally three-dimensionally-displaying organ inner wall surface undergone the process of eversion treatment by utilizing interactive mode, so that the user can make observation from external visual angle.
Description
Technical field
What the present invention relates to is a kind of method of technical field of image processing, is specifically related to a kind of cavity internal organs inwall virtual eversion formula three-dimensional looking method outward.
Technical background
At present, utilize medical imaging datas such as CT, MRI, cavity channel internal organs inwall is carried out three-dimensional visualization rebuild that main what adopt is virtual endoscopic techniques.This technical modelling the traditional optical endoscope body in tract, advance, internally the internal organs inwall is observed with the visual angle of endoscope optical.The advantage of this technology is to have overcome traditional optical endoscope and needs endoscope body is inserted the intravital shortcoming of people, is a kind of complete touchless inspection method.The shortcoming of existing virtual endoscopic techniques is to peep in viewing angle still is confined to, and the visual angle is limited, can't integrally observe the anatomic form of internal organs, and is directly perceived inadequately to the location of focus, also can't understand the situation of affected area internal organs outside.
Find through literature search prior art, Vilanova Bartroli, A.V etc. are at Visualization, 2001.VIS ' 01.Proceedings (visual meeting of calendar year 2001) (21-26 day October calendar year 2001, the 411-579 page or leaf) " Colonunraveling based on electrical field:Recent progress and further work " (colon based on electric field is taken apart: latest developments and work from now on) that " Nonlinear virtual colon unfolding " that delivers on (non-linear virtual colon launch) and G.Wang etc. deliver on In Proceedings SPIE (SPIE's international conference) (May the 3660th in 1999 was rolled up the 125-132 page), two pieces of articles have proposed scheme that the cavity internal organs are carried out observing after the virtual flattening again respectively.The method of these two kinds of schemes all is that the cavity viscera dummy is taken apart and flattened to a plane, can realize like this inwall of internal organs is observed from outside visual angle.Its deficiency is: utilize their method the internal organs inwall being flattened in the process of reconstruction, the inwall of internal organs can produce deformation, particularly in the irregular or crooked zone of some internal organs geometries, deformation is even more serious, thereby the reliability of influence diagnosis, and flatten reconstructed results and destroyed internal organs geometry originally, make that diagnosis is directly perceived inadequately.
Summary of the invention
The present invention is directed to existing virtual endoscopic techniques and Vilanova Bartroli, the deficiency of designed scheme such as A.V etc., G.Wang, a kind of cavity internal organs inwall virtual eversion formula three-dimensional looking method has outward been proposed, make it both can be observed the whole anatomic form of colon, can diagnose and observe the trickle pathological changes of inwall again, and focus is accurately located.
The present invention realizes by following technical method, the present invention at first obtains the medical science original image, after image carried out pretreatment and cutting apart, extract the inner wall surface of required cavity internal organs more respectively and supply to turn up the datum level of processing, then the data of inner wall surface are turned up to the datum level outside in the mode of mirror image, the internal organs inner wall surface that to turn up at last after handling is come out with interactively mode three dimensional display, observes from the visual angle of outside for the user.
The described medical science original image that obtains is meant: utilize medical imaging means such as CT, MRI, obtain to comprise the medical image for the treatment of visual reconstruction internal organs.Image can be a faultage image, can directly be three-dimensional data also.
Describedly image is carried out pretreatment and cut apart, be meant: original image is carried out necessary filtering and interpolation, remove the noise of image.And take the method for various suitable image segmentation, the cavity internal organs are carried out dividing processing from original image.For than the situation that is easier to cut apart, cut apart and to utilize corresponding algorithm to realize cutting apart automatically.Can not realize if cut apart automatically, then can take to realize cutting apart image in conjunction with manual or manual fully method.
The described inner wall surface that extracts required cavity internal organs is meant: utilize the view data after having cut apart, take the method for mobile cube algorithm or other surface rendering, obtain the detailed data of internal organs inner wall surface.
The datum level that the described confession that extracts required cavity internal organs is turned up and handled is meant: the view data after same utilization has been cut apart, by extracting again, draw out a datum level that is used to turn up.This datum level must be comparatively level and smooth, and can represent the actual anatomic form of waiting to rebuild internal organs, therefore should take different extracting method according to practical situation.Thin for outer wall and cut apart easily internal organs can extract this outer wall surface, as the datum level that turns up; For outer wall surface out-of-shape or the internal organs that are difficult to cut apart, can take the inner wall surface after the smoothing processing or utilize the bigger cube of yardstick to carry out the inner wall surface data that obtain behind the surface rendering, be used as the datum level that turns up; For the thicker internal organs of wall, also can be with the central point of inner wall surface and outer wall surface as the datum level that turns up.
Described data with inner wall surface are turned up to the datum level outside in the mode of mirror image, be meant: with the extract internal organs inner wall surface data that obtain, along the datum level normal direction of turning up, minute surface is mapped to the opposite side of datum level, and draws out the surface data after turning up again.
The described internal organs inner wall surface that will turn up after handling is come out with interactively mode three dimensional display, is meant: the surface after will turning up, and carry out three-dimensional visualization and show.Observation visual angle is positioned at the outside, and can be chosen arbitrarily by the user.
The present invention is with respect to the advantage of general virtual endoscopic techniques and virtual expansion visualization technique: 1, expansion and flexible is more opened at the visual angle, both can hold the whole anatomic form of these internal organs during diagnosis, can observe the trickle architectural feature of inwall again.2, more directly perceived and accurate to the location of affected area.Can interrelate by intuitively that the internal structure of cavity internal organs is outside together tissue and organ when 3, diagnosing.4, can not bring the morphosis of inwall than large deformation, what guarantee to diagnose is accurate.
The specific embodiment
The inventive method concrete steps are as follows: (1) obtains the medical science original image.(2) image is carried out pretreatment and cut apart.(3) extract the internal organs inner wall surface.(4) extract the datum level that turns up.(5) to the processing of turning up of internal organs inner wall surface data.(6) the interactive demonstration.Below in conjunction with a specific embodiment technical scheme of the present invention is described in further detail.
This embodiment adopts the sample of human colon as visual reconstruction.The implementation procedure of whole invention is as follows:
1. the hypogastric region to human body carries out the CT imaging, obtains the CT faultage image data.
2. faultage image is carried out necessary Filtering Processing, comprise gaussian filtering and medium filtering, remove denoising.Utilize the region growing algorithm, be partitioned into the cavity part of colon inside from faultage image, this part data is used for drawing inner wall surface.Then, utilize the method for local threshold again, and can choose, be partitioned into the data of colon wall, be used for drawing outer wall surface in conjunction with manual.
3. the colon lumen image to being partitioned into adopts mobile cube algorithm, draws out the surface of meticulous colon inwall.This surface can be observed with the angle of conventional endoscope internally for the user, needs further to handle, and just can reach outer effect of looking.
4. to the image of the colon wall that is partitioned into, adopt mobile cube algorithm equally, and simplify resulting tri patch, draw out the surface of smoother colon outer wall.The image of this colon outer wall surface promptly can be used as the datum level that turns up.
With the every bit of the colonic wall surface that obtained along the datum level normal direction, be benchmark with the point on the colon outer wall surface, minute surface is mapped to the opposite side of colon outer wall surface.Like this, the just complete virtual eversion in the surface of inwall has arrived the outside of outer wall, and promptly available outside visual angle is observed this surface.
6. the inner surface that be in the outside after will shining upon repaints, and adds illumination and plays up, and show with alternant way.The user can change the visual angle arbitrarily, and this surface is observed from the outside.
Such embodiment can reconstruct the colon visualization effect behind the virtual eversion.Like this as the inside-out of pocket is routed up, the inwall of colon can show in that outer surface is virtual.The user can change different visual angles neatly, both can be observed the whole anatomic form of colon, can diagnose and observes the trickle pathological changes of inwall again, and focus is accurately located.
Claims (5)
1, a kind of cavity internal organs inwall virtual eversion formula three-dimensional looking method outward, it is characterized in that: at first obtain the medical science original image, after image carried out pretreatment and cutting apart, extract the inner wall surface of required cavity internal organs more respectively and supply to turn up the datum level of processing, then the data of inner wall surface are turned up to the datum level outside in the mode of mirror image, the internal organs inner wall surface that to turn up at last after handling is come out with interactively mode three dimensional display, observes from the visual angle of outside for the user.
2, cavity internal organs inwall virtual eversion formula three-dimensional according to claim 1 looking method outward, it is characterized in that, describedly image is carried out pretreatment and cut apart, be meant: original image is carried out filtering and interpolation, remove the noise of image, and the cavity internal organs are carried out dividing processing from original image, cut apart and utilize corresponding algorithm to cut apart automatically, perhaps take in conjunction with manually or manual fully method realize cutting apart to image.
3, cavity internal organs inwall virtual eversion formula three-dimensional according to claim 1 looking method outward, it is characterized in that, the described inner wall surface that extracts required cavity internal organs, be meant: utilize the view data after having cut apart, take mobile cube algorithm, obtain the detailed data of internal organs inner wall surface.
4, cavity internal organs inwall virtual eversion formula three-dimensional according to claim 1 looking method outward, it is characterized in that, described data with inner wall surface are turned up to the datum level outside in the mode of mirror image, be meant: with the extract internal organs inner wall surface data that obtain, along the datum level normal direction of turning up, minute surface is mapped to the opposite side of datum level, and draws out the surface data after turning up again.
5, cavity internal organs inwall virtual eversion formula three-dimensional according to claim 1 looking method outward, it is characterized in that, the described internal organs inner wall surface that will turn up after handling is come out with interactively mode three dimensional display, be meant: the surface after will turning up, carrying out three-dimensional visualization shows, observation visual angle is positioned at the outside, is chosen arbitrarily by the user.
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| CNB2006100266640A CN100464705C (en) | 2006-05-18 | 2006-05-18 | Invented eversion type 3-D external viewing method for cavity organ internal wall |
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| CN100464705C true CN100464705C (en) | 2009-03-04 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101612041B (en) * | 2008-06-26 | 2011-12-07 | 西门子（中国）有限公司 | Computer assistant method and computer assistant device |
| CN101477677B (en) * | 2008-12-25 | 2011-01-19 | 上海交通大学 | Method for tubular object virtually out-turning based on central path |
| CN101561930B (en) * | 2009-05-07 | 2012-06-13 | 上海交通大学 | Improved visualized method of virtual eversion of pipeline-shaped object |
| EP3568837A1 (en) * | 2017-01-12 | 2019-11-20 | Navix International Limited | Flattened view for intra-lumenal navigation |
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| US5458111A (en) * | 1994-09-06 | 1995-10-17 | William C. Bond | Computed tomographic colonoscopy |
| WO1998032371A1 (en) * | 1997-01-24 | 1998-07-30 | Mayo Foundation For Medical Education And Research | System for two-dimensional and three-dimensional imaging of tubular structures in the human body |
| US6212420B1 (en) * | 1998-03-13 | 2001-04-03 | University Of Iowa Research Foundation | Curved cross-section based system and method for gastrointestinal tract unraveling |
| US20020106116A1 (en) * | 2000-11-28 | 2002-08-08 | Knoplioch Jerome F. | Method and apparatus for analyzing vessels displayed as unfolded structures |
| CN1644160A (en) * | 2005-02-03 | 2005-07-27 | 四川大学 | Distributed cardiac image multi-dimensional re-building and interactive visual method |
| WO2006000942A2 (en) * | 2004-06-23 | 2006-01-05 | Koninklijke Philips Electronics N.V. | Image processing system for displaying information relating to parameters of a 3-d tubular object |
| CN1745714A (en) * | 2004-09-09 | 2006-03-15 | 西门子公司 | Method for segmenting anatomical structures from 3d image data by using topological information |
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2006
- 2006-05-18 CN CNB2006100266640A patent/CN100464705C/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5458111A (en) * | 1994-09-06 | 1995-10-17 | William C. Bond | Computed tomographic colonoscopy |
| WO1998032371A1 (en) * | 1997-01-24 | 1998-07-30 | Mayo Foundation For Medical Education And Research | System for two-dimensional and three-dimensional imaging of tubular structures in the human body |
| US6212420B1 (en) * | 1998-03-13 | 2001-04-03 | University Of Iowa Research Foundation | Curved cross-section based system and method for gastrointestinal tract unraveling |
| US20020106116A1 (en) * | 2000-11-28 | 2002-08-08 | Knoplioch Jerome F. | Method and apparatus for analyzing vessels displayed as unfolded structures |
| WO2006000942A2 (en) * | 2004-06-23 | 2006-01-05 | Koninklijke Philips Electronics N.V. | Image processing system for displaying information relating to parameters of a 3-d tubular object |
| CN1745714A (en) * | 2004-09-09 | 2006-03-15 | 西门子公司 | Method for segmenting anatomical structures from 3d image data by using topological information |
| CN1644160A (en) * | 2005-02-03 | 2005-07-27 | 四川大学 | Distributed cardiac image multi-dimensional re-building and interactive visual method |
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