CN108257196A - A kind of blood vessel based on cardiac CT image stretches method for reconstructing - Google Patents
A kind of blood vessel based on cardiac CT image stretches method for reconstructing Download PDFInfo
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- CN108257196A CN108257196A CN201810025466.5A CN201810025466A CN108257196A CN 108257196 A CN108257196 A CN 108257196A CN 201810025466 A CN201810025466 A CN 201810025466A CN 108257196 A CN108257196 A CN 108257196A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T11/00—2D [Two Dimensional] image generation
- G06T11/20—Drawing from basic elements, e.g. lines or circles
- G06T11/203—Drawing of straight lines or curves
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10072—Tomographic images
- G06T2207/10081—Computed x-ray tomography [CT]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/30—Subject of image; Context of image processing
- G06T2207/30004—Biomedical image processing
- G06T2207/30101—Blood vessel; Artery; Vein; Vascular
Abstract
The invention discloses a kind of blood vessels based on cardiac CT image to stretch method for reconstructing, includes the following steps：Step S1：Obtain cardiac three-dimensional CT data and vessel centerline data；Step S2：Extend the point specified number respectively along positive and negative direction to each point in vessel centerline, adjacent four points are connected quadrangularly, then by these quadrangle combination producing curved surfaces；Step S3：The world coordinates each put on curved surface according to interpolation method is corresponded to the image coordinate in cardiac three-dimensional CT data, corresponding pixel grey scale is obtained, obtains gray surface；Step S4：Curved surface is carried out to rectangle plane to stretch projection mapping, obtain blood vessel stretches reconstruction image；It is an advantage of the current invention that can doctor more intuitively be presented to blood vessel, multi-level, multi-angle observation is realized, while be convenient for doctor's more rapidly and accurately qualitative or quantitative analysis blood vessel, find lesion locations（Such as narrow, occlusion, aneurysm, angiolithic degeneration etc.）.
Description
Technical field
The invention belongs to CT technical field of image processing, and weight is stretched more particularly, to a kind of blood vessel based on cardiac CT image
Construction method.
Background technology
The visualization problem of tubular structure tissue (such as blood vessel) is an important topic in field of medical images, due to CT
Image and magnetic resonance image can provide the three-dimensional data sequence of human body for researcher, and the studies above is contained in these sequences
Personnel are to its interested tubular structure tissue.Therefore researcher can by reading the three-dimensional data sequence of human body,
So as to carry out visual research to tubular structure tissue.
But existing method realizes that visual research can also encounter corresponding problem, that is, these three-dimensional data sequences
In also contain the uninterested other structures tissue of some researchers.And if to this three-dimensional data sequence without
Pretreatment is crossed, volume drawing (such as maximum intensity projection MIP, light projection and shaded surface) is directly carried out, since these are felt
The tubular structure tissue of interest can not possibly be integrally all located in a single plane, it will obtain inaccurate imaging result.
Invention content
The present invention seeks to：A kind of blood vessel based on cardiac CT image is provided and stretches method for reconstructing, by blood vessel along therein
Center line, which stretch reconstruction, to be more intuitively presented to doctor blood vessel, realize multi-level, multi-angle observation, while just
Yu doctor's more rapidly and accurately qualitative or quantitative analysis blood vessel finds lesion locations (such as narrow, occlusion, aneurysm, blood vessel
Wall calcification etc.), therefore blood vessel stretches the important component that reconstruction is vessels analysis, to vessels analysis important in inhibiting.
The technical scheme is that：A kind of blood vessel based on cardiac CT image stretches method for reconstructing, includes the following steps：
Step S1：Obtain cardiac three-dimensional CT data and vessel centerline data；
Step S2：The point specified number is extended respectively along positive and negative direction to each point in vessel centerline, phase
Four adjacent points are connected quadrangularly, then by these quadrangle combination producing curved surfaces；
Step S3：The world coordinates each put on curved surface is corresponded to the image in cardiac three-dimensional CT data according to interpolation method to sit
Mark, obtains corresponding pixel grey scale, obtains gray surface；
Step S4：Curved surface is carried out to rectangle plane to stretch projection mapping, obtain blood vessel stretches reconstruction image.
As preferred technical solution, the cardiac three-dimensional CT data in step S1 are scanned obtained sequence image by CT machines
Middle acquisition.
As preferred technical solution, the vessel centerline in step S1 is coronary artery center line, and the coronary artery center line by
Coronary artery central point line forms.
As preferred technical solution, the specific method that curved surface is generated in step S2 is as follows：
Assuming that line direction vector isSpecified points are set as m, then always counting as 2*m-1, line side on camberline direction
Upward extension total distance is assumed to be s, then the spacing between each point in line direction isSo in vessel centerline
Any point PiThe each point X of (i=0,1 ..., n-1) online direction extensionjThe coordinate of (j=0,1 ..., 2*m-1) is as follows
It acquires：
The point in line direction and vessel centerline direction is sequentially connected, that is, forms the curved surface of n rows * (2*m-1) row size, it is bent
Total points in face are n* (2*m-1).
As preferred technical solution, the specific method that projection mapping is stretched in step S4 is as follows：
Firstly generate a width n rows, 2*m-1 row sizes rectangular image, then by curved surface per all pixels point in a line
It is mapped on the correspondence row of rectangular image, obtains the rectangle gray level image that a size is arranged for n rows, 2*m-1.
As preferred technical solution, in step S4 the row pel spacing of rectangle gray level image by every 2 points on center line it
Between distance summation divided by points determine.
It is an advantage of the invention that：
1. the blood vessel the present invention is based on cardiac CT image stretches method for reconstructing, blood vessel is stretched along center line therein
It rebuilds, i.e., is carried out sampling at equal intervals blood vessel section sequence of the generation perpendicular to vessel directions between waiting according to center line, most at last etc.
Blood vessel section rebuilding series are spaced to achieve the purpose that blood vessel stretches, can blood vessel be more intuitively presented to doctor, are realized
At many levels, multi-angle observation, while it is convenient for doctor's more rapidly and accurately qualitative or quantitative analysis blood vessel, find lesion locations
(such as narrow, occlusion, aneurysm, angiolithic degeneration etc.), therefore blood vessel stretches the important component that reconstruction is vessels analysis,
To vessels analysis important in inhibiting.
Description of the drawings
The invention will be further described with reference to the accompanying drawings and embodiments：
Fig. 1 is the flow chart of the present invention；
Fig. 2 is the blood vessel 3 D reconstructing design sketch of the present invention；
Fig. 3 is (coronary artery) blood vessel straightening effect figure pointed by arrow in Fig. 2 of the present invention.
Specific embodiment
Embodiment：With reference to shown in Fig. 1, the blood vessel of the invention based on cardiac CT image stretches method for reconstructing, including as follows
Step：
Step S1：Obtain cardiac three-dimensional CT data (with reference to shown in Fig. 2) and vessel centerline data, wherein cardiac three-dimensional CT
Data are scanned by CT machines to be obtained in obtained sequence image, and vessel centerline is for coronary artery center line and by coronary artery central point line
It forms；
Step S2：The point specified number is extended respectively along positive and negative direction to each point in vessel centerline, phase
Four adjacent points are connected quadrangularly, then by these quadrangle combination producing curved surfaces；
It is as follows that it generates the specific method of curved surface：Assuming that line direction vector isSpecified points are set as m, then camberline
Total points on direction are 2*m-1, and the extension total distance on line direction is assumed to be s, then the spacing between each point in line direction
ForAny point P so in vessel centerlineiThe each point X of (i=0,1 ..., n-1) online direction extensionj(j=0,
1 ..., 2*m-1) coordinate acquire as follows：
The point in line direction and vessel centerline direction is sequentially connected, that is, forms the curved surface of n rows * (2*m-1) row size, it is bent
Total points in face are n* (2*m-1).；
Step S3：The world coordinates each put on curved surface is corresponded to the image in cardiac three-dimensional CT data according to interpolation method to sit
Mark, obtains corresponding pixel grey scale, obtains gray surface；
Step S4：Curved surface is carried out to rectangle plane to stretch projection mapping, obtains the reconstruction image that stretches of blood vessel, with reference to figure
Shown in 3, the specific method for stretching projection mapping is as follows：Firstly generate a width n rows, 2*m-1 row sizes rectangular image, then
All pixels point in the every a line of curved surface is mapped on the correspondence row of rectangular image, a size is obtained and is arranged for n rows, 2*m-1
Rectangle gray level image, the row pel spacing of the rectangle gray level image is by the summation divided by point per distance between two points on center line
Number determines.
Blood vessel the present invention is based on cardiac CT image stretches method for reconstructing, and blood vessel along center line therein stretch again
It builds, i.e., is carried out sampling at equal intervals blood vessel section sequence of the generation perpendicular to vessel directions between waiting according to center line, between most waiting at last
Every blood vessel section rebuilding series to achieve the purpose that blood vessel stretches, can blood vessel be more intuitively presented to doctor, realized more
Level, multi-angle observation, while it is convenient for doctor's more rapidly and accurately qualitative or quantitative analysis blood vessel, find lesion locations (example
Such as narrow, occlusion, aneurysm, angiolithic degeneration), therefore blood vessel stretches the important component that reconstruction is vessels analysis, it is right
Vessels analysis important in inhibiting.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all can carry out modifications and changes under the spirit and scope without prejudice to the present invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete without departing from disclosed spirit and institute under technological thought such as
Into all equivalent modifications or change, should by the present invention claim be covered.
Claims (6)
1. a kind of blood vessel based on cardiac CT image stretches method for reconstructing, which is characterized in that includes the following steps：
Step S1：Obtain cardiac three-dimensional CT data and vessel centerline data；
Step S2：The point specified number is extended respectively along positive and negative direction to each point in vessel centerline, it is adjacent
Four points are connected quadrangularly, then by these quadrangle combination producing curved surfaces；
Step S3：The world coordinates each put on curved surface is corresponded to the image coordinate in cardiac three-dimensional CT data according to interpolation method,
Corresponding pixel grey scale is obtained, obtains gray surface；
Step S4：Curved surface is carried out to rectangle plane to stretch projection mapping, obtain blood vessel stretches reconstruction image.
2. the blood vessel according to claim 1 based on cardiac CT image stretches method for reconstructing, which is characterized in that in step S1
Cardiac three-dimensional CT data scanned in obtained sequence image and obtain by CT machines.
3. the blood vessel according to claim 1 based on cardiac CT image stretches method for reconstructing, which is characterized in that in step S1
Vessel centerline for coronary artery center line, and the coronary artery center line is formed by coronary artery central point line.
4. the blood vessel according to claim 1 based on cardiac CT image stretches method for reconstructing, which is characterized in that in step S2
The specific method for generating curved surface is as follows：
Assuming that line direction vector isSpecified points are set as m, then total points on camberline direction are 2*m-1, on line direction
Extension total distance be assumed to be s, then the spacing between each point in line direction isIt is arbitrary so in vessel centerline
One point PiThe each point X of (i=0,1 ..., n-1) online direction extensionjThe coordinate of (j=0,1 ..., 2*m-1) is asked as follows
：
The point in line direction and vessel centerline direction is sequentially connected, that is, forms the curved surface of n rows * (2*m-1) row size, curved surface
Total points are n* (2*m-1).
5. the blood vessel according to claim 1 based on cardiac CT image stretches method for reconstructing, which is characterized in that in step S4
The specific method for stretching projection mapping is as follows：
Firstly generate a width n rows, 2*m-1 row sizes rectangular image, then curved surface is mapped per all pixels point in a line
Onto the correspondence row of rectangular image, the rectangle gray level image that a size is arranged for n rows, 2*m-1 is obtained.
6. the blood vessel according to claim 5 based on cardiac CT image stretches method for reconstructing, which is characterized in that in step S4
The row pel spacing of rectangle gray level image is determined by the summation per distance between two points on center line divided by points.
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| CN109920027A (en) * | 2019-03-01 | 2019-06-21 | 数坤（北京）网络科技有限公司 | A kind of curve reestablishing method, equipment and computer-readable medium |
| CN110009616A (en) * | 2019-04-01 | 2019-07-12 | 数坤（北京）网络科技有限公司 | A kind of punctate clacification detection method |
| CN110033442A (en) * | 2019-04-01 | 2019-07-19 | 数坤（北京）网络科技有限公司 | A kind of angiosteosis method for detecting area and system based on analysis line drawing |
| CN112037170A (en) * | 2020-07-23 | 2020-12-04 | 上海交通大学附属第六人民医院 | Method and device for detecting vascular stenosis and computer storage medium |
| CN112057204A (en) * | 2020-07-23 | 2020-12-11 | 常州锦瑟医疗信息科技有限公司 | Aorta blood vessel support windowing device based on mixed reality technology |
| CN112132949A (en) * | 2019-11-19 | 2020-12-25 | 苏州润迈德医疗科技有限公司 | Blood vessel three-dimensional modeling method, device and system with narrow lesion interval |
| CN112489159A (en) * | 2021-02-05 | 2021-03-12 | 南京安科医疗科技有限公司 | Fast phase interpolation method for cardiac CT, image reconstruction device and storage medium |
| CN112614217A (en) * | 2020-12-17 | 2021-04-06 | 深圳睿心智能医疗科技有限公司 | Straightening method and device for three-dimensional model of tubular object and electronic equipment |
| CN112734917A (en) * | 2021-03-29 | 2021-04-30 | 杭州晟视科技有限公司 | Three-dimensional curved surface reconstruction and optimization method, system and storage medium of medical data |
| CN113470060A (en) * | 2021-07-08 | 2021-10-01 | 西北工业大学 | Coronary artery multi-angle curved surface reconstruction visualization method based on CT image |
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| CN110033442A (en) * | 2019-04-01 | 2019-07-19 | 数坤（北京）网络科技有限公司 | A kind of angiosteosis method for detecting area and system based on analysis line drawing |
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| CN112132949B (en) * | 2019-11-19 | 2024-01-23 | 苏州润迈德医疗科技有限公司 | Three-dimensional modeling method, device and system for blood vessel with narrow lesion region |
| CN112132949A (en) * | 2019-11-19 | 2020-12-25 | 苏州润迈德医疗科技有限公司 | Blood vessel three-dimensional modeling method, device and system with narrow lesion interval |
| CN112037170A (en) * | 2020-07-23 | 2020-12-04 | 上海交通大学附属第六人民医院 | Method and device for detecting vascular stenosis and computer storage medium |
| CN112057204A (en) * | 2020-07-23 | 2020-12-11 | 常州锦瑟医疗信息科技有限公司 | Aorta blood vessel support windowing device based on mixed reality technology |
| CN112614217A (en) * | 2020-12-17 | 2021-04-06 | 深圳睿心智能医疗科技有限公司 | Straightening method and device for three-dimensional model of tubular object and electronic equipment |
| CN112489159A (en) * | 2021-02-05 | 2021-03-12 | 南京安科医疗科技有限公司 | Fast phase interpolation method for cardiac CT, image reconstruction device and storage medium |
| CN112734917A (en) * | 2021-03-29 | 2021-04-30 | 杭州晟视科技有限公司 | Three-dimensional curved surface reconstruction and optimization method, system and storage medium of medical data |
| CN113470060A (en) * | 2021-07-08 | 2021-10-01 | 西北工业大学 | Coronary artery multi-angle curved surface reconstruction visualization method based on CT image |
| CN113470060B (en) * | 2021-07-08 | 2023-03-21 | 西北工业大学 | Coronary artery multi-angle curved surface reconstruction visualization method based on CT image |
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