CN100464709C - Method for improving effect of visualization of cavernous internal organs by using virtual air filling method - Google Patents
Method for improving effect of visualization of cavernous internal organs by using virtual air filling method Download PDFInfo
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- CN100464709C CN100464709C CNB2006100296877A CN200610029687A CN100464709C CN 100464709 C CN100464709 C CN 100464709C CN B2006100296877 A CNB2006100296877 A CN B2006100296877A CN 200610029687 A CN200610029687 A CN 200610029687A CN 100464709 C CN100464709 C CN 100464709C
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Abstract
A virtual inflation method for improving the visualizing effect of hollow viscus includes such steps as finding out the central skeleton of whole viscus according to the body data of obtained and divided hollow viscus, creating its constraint conditions, and deforming the image of viscus to make it have maximal volume, so obtaining the image of virtually inflated viscus.
Description
Technical field
What the present invention relates to is a kind of method of technical field of image processing, is specifically related to the method that the virtual inflation of a kind of usefulness improves cavity internal organs effect of visualization.
Background technology
At present, utilize medical imaging datas such as CT, MRI, the inwall of body internal cavity internal organs such as colon, stomach, trachea etc. is carried out three-dimensional visualization is rebuild and what carry out that clinical diagnosis mainly adopts is virtual endoscopic techniques.This technical modelling traditional optical endoscope in tract, advance, to observe and diagnose in the visual angle of endoscope optical.The advantage of this technology is that it is a kind of method of not having intrusive mood, to the patient bring painful less.
Find through literature search prior art, in " development of the virtual scope of 3 D human body and applied research " literary composition that the leaf Kien Giang is delivered, introduced the characteristics and main application of virtual endoscopic techniques on " medical equipment information " (2002 the 6th phase 48-50 pages or leaves).Be in the cavity internal organs under nature or the emptying state in human body, as colon, bladder etc., a lot of places can be the flat state that contracts, and can influence the reconstruction of virtual endoscopic techniques and visual like this.In this literary composition, solution to this problem is when carrying out CT or MRI inspection colon to be carried out actual inflation.The deficiency of this method is: then powerless for some internal organs that can not inflate such as bladder or blood vessel etc., limitation is arranged; The process of inflation can be brought discomfort to the patient.
Summary of the invention
The present invention is directed to existing virtual endoscopic techniques and the cavity internal organs that are the flat state that contracts are carried out the deficiency of visual reconstruction aspect, the method that the virtual inflation of a kind of usefulness improves cavity internal organs effect of visualization has been proposed, make before the patient who need is taked the virtual endoscope diagnosis carries out CT or MRI inspection, need not patient's internal organs are carried out actual inflation, reduce patient's misery.Simultaneously, the internal organs for originally can't actual inflation also can carry out virtual inflation, thereby peep effect of visualization in obtaining preferably.
The present invention realizes by following technical method, the present invention is to obtaining and cut apart the volume data of good cavity internal organs, at first find out the center framework of whole internal organs, set up constraints according to the different situations of each internal organs again, make these internal organs satisfy under the situation of these constraintss then in maintenance, it is carried out anamorphose, make the cumulative volume of these internal organs obtain maximum.Volume is obtained the internal organs image after peaked image is virtual inflation after this distortion.
The described volume data of having obtained and having cut apart good cavity internal organs is meant: the human medical data that method obtained such as CT or MRI are carried out three-dimensional reconstruction, and be partitioned into required internal organs image volumetric data.
The described center framework of finding out whole internal organs is meant: with this internal organs three-dimensional data, adopt the method for topology refinement or range conversion, find out the center framework of these internal organs.
The described constraints of setting up is meant: set up the condition that must satisfy all the time in some its deformation operation afterwards for the image of these internal organs, comprise that center framework is constant, the feature girth of characteristic cross-section is constant, the mark sheet area is constant.
The feature girth of described characteristic cross-section is meant: in the three-dimensional data of these internal organs, find out the perpendicular and cross section that the anatomical structure of these internal organs is played an important role of concentricity skeleton according to different needs.And then calculate each cross section girth after through necessary Filtering Processing.
The described perpendicular and cross section that the anatomical structure of these internal organs is played an important role of concentricity skeleton of finding out, be meant: along center framework, take out a vertical with it cross section every certain distance, perhaps according to the anatomical structure of these internal organs, play the zone of non-resilient restriction at anatomic form to internal organs, as the traverse furrow place between the haustra of colon, the zone of ligament parcel etc. is arranged, take out the cross section.
Described mark sheet area is meant: according to characteristic cross-section internal organs are divided into several parts, calculate then various piece through necessary Filtering Processing after resulting surface area.
Described it is carried out anamorphose, make the cumulative volume of these internal organs obtain maximum, be meant: take directly to calculate or the method for iteration progressively, obtain the 3-D view after these internal organs carry out virtual inflation.This image must satisfy all constraintss and volume is obtained maximum.
The present invention uses above method, has realized the virtual inflation to the cavity internal organs.The advantage of this method is: (1) is improved cavity is carried out peeping in virtual and the effect of other method for visualizing, increases the visual field, improves diagnosis effect.(2),, also can obtain the effect behind the inflation as bladder, blood vessel etc. for some can't truly inflate or be difficult to realize the internal organs of true inflation in the body.(3) avoided clinical in real gas replenishment process, reduce patient's misery.
The specific embodiment
The inventive method concrete steps are as follows: (1) is read in primitive medicine CT or MRI data and is carried out three-dimensional reconstruction.(2) carry out data and cut apart, obtain interested pipeline internal organs part.(3) obtain center framework.(4) obtain with center framework vertical Partial Feature cross section and obtain its feature girth.(5) obtain the mark sheet area of internal organs.(6) carry out anamorphose, make image meet constraints and obtain maximum volume again.Below in conjunction with a specific embodiment technical scheme of the present invention is described in further detail.
This embodiment adopts not the human body hypogastric region CT slice of data that colon is inflated processing as sample, in the hope of obtaining the colon data after the virtual inflation.The implementation procedure of whole invention process is as follows:
1. read in human body hypogastric region CT data, and these successive section sequences are reconstructed into a three-dimensional data.
2. volume data is cut apart, adopted the algorithm of region growing, obtain the three-dimensional binaryzation volume data of colon lumen.
3. utilize the method for morphology refinement, obtain the skeleton of colon, and skeleton is carried out necessary The disposal of gentle filter, get center framework to the end.
4. from the summit of center framework, find out a series of and the perpendicular cross section of skeleton.These cross sections are the traverse furrow place between each haustra of colon of colon all.Calculate the girth in each cross section then.
5. utilize the cross section that colon segmentation is different brief summary intestinal segments, calculate the surface area of each brief summary intestinal segment then.
6. the maintenance center framework is constant, perimeter of section is constant, the surface area of every part is constant, makes each brief summary intestinal segment carry out anamorphose respectively, makes the volume of each brief summary intestinal segment all obtain maximum.Brief summary intestinal segment after will being out of shape then is recombine in together, can obtain the colon 3-D view volume data after the virtual inflation.
Such embodiment can make the colon that did not originally fill gas simulate the process of inflation, is the tympanites state, thereby makes and further increasing the visual field in the visualized operation, improves effect of visualization.
Claims (3)
1, the virtual inflation of a kind of usefulness improves the method for cavity internal organs effect of visualization, it is characterized in that, to obtaining and cut apart the volume data of good cavity internal organs, at first find out the center framework of whole internal organs, set up constraints according to the situation of each internal organs again, make these internal organs satisfy under the situation of these constraintss then in maintenance, it is carried out anamorphose, make the cumulative volume of these internal organs obtain maximum, to obtain peaked image be exactly internal organs image after the virtual inflation to volume after this distortion;
The described center framework of finding out whole internal organs is meant: with this internal organs three-dimensional data, adopt the method for topology refinement or range conversion, find out the center framework of these internal organs;
The described constraints of setting up is meant: set up the condition that must satisfy all the time in its deformation operation afterwards for the image of these internal organs, comprise that center framework is constant, the feature girth of characteristic cross-section is constant, the mark sheet area is constant;
Described it is carried out anamorphose, make the cumulative volume of these internal organs obtain maximum, be meant: take directly calculating or the progressively method of iteration, obtain the 3-D view after these internal organs carry out virtual inflation, this image must satisfy all constraintss and volume is obtained maximum;
The feature girth of described characteristic cross-section, be meant: in the three-dimensional data of these internal organs, find out the perpendicular and cross section that the anatomical structure of these internal organs is played an important role of concentricity skeleton as required, and then calculate each cross section through the girth after Filtering Processing;
Described mark sheet area is meant: according to characteristic cross-section internal organs are divided into several parts, calculate various piece then through resulting surface area after the Filtering Processing.
2, the virtual inflation of usefulness according to claim 1 improves the method for cavity internal organs effect of visualization, it is characterized in that, the described volume data of having obtained and having cut apart good cavity internal organs, be meant: the human medical data that CT or MRI method are obtained are carried out three-dimensional reconstruction, and be partitioned into required internal organs image volumetric data.
3, the virtual inflation of usefulness according to claim 1 improves the method for cavity internal organs effect of visualization, it is characterized in that, the described perpendicular and cross section that the anatomical structure of these internal organs is played an important role of concentricity skeleton of finding out, be meant: along center framework, take out a vertical with it cross section every certain distance, perhaps according to the anatomical structure of these internal organs, play the zone of non-resilient restriction at anatomic form to internal organs, comprise the traverse furrow place between the haustra of colon, the zone that has ligament to wrap up, take out the cross section.
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| CNB2006100296877A CN100464709C (en) | 2006-08-03 | 2006-08-03 | Method for improving effect of visualization of cavernous internal organs by using virtual air filling method |
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| CNB2006100296877A CN100464709C (en) | 2006-08-03 | 2006-08-03 | Method for improving effect of visualization of cavernous internal organs by using virtual air filling method |
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| CN100464709C true CN100464709C (en) | 2009-03-04 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1135047A (en) * | 1994-11-23 | 1996-11-06 | 通用电气公司 | Virtual internal cavity inspection system |
| US20050033114A1 (en) * | 2003-05-14 | 2005-02-10 | Bernhard Geiger | Method and apparatus for fast automatic centerline extraction for virtual endoscopy |
| US20050152588A1 (en) * | 2003-10-28 | 2005-07-14 | University Of Chicago | Method for virtual endoscopic visualization of the colon by shape-scale signatures, centerlining, and computerized detection of masses |
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- 2006-08-03 CN CNB2006100296877A patent/CN100464709C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1135047A (en) * | 1994-11-23 | 1996-11-06 | 通用电气公司 | Virtual internal cavity inspection system |
| US20050033114A1 (en) * | 2003-05-14 | 2005-02-10 | Bernhard Geiger | Method and apparatus for fast automatic centerline extraction for virtual endoscopy |
| US20050152588A1 (en) * | 2003-10-28 | 2005-07-14 | University Of Chicago | Method for virtual endoscopic visualization of the colon by shape-scale signatures, centerlining, and computerized detection of masses |
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| CN1903133A (en) | 2007-01-31 |
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