CN108597590A - The arbitrary layer data display methods of volume data based on GPU operations and system - Google Patents
The arbitrary layer data display methods of volume data based on GPU operations and system Download PDFInfo
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- CN108597590A CN108597590A CN201810433137.4A CN201810433137A CN108597590A CN 108597590 A CN108597590 A CN 108597590A CN 201810433137 A CN201810433137 A CN 201810433137A CN 108597590 A CN108597590 A CN 108597590A
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
- G16H30/00—ICT specially adapted for the handling or processing of medical images
- G16H30/20—ICT specially adapted for the handling or processing of medical images for handling medical images, e.g. DICOM, HL7 or PACS
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T15/00—3D [Three Dimensional] image rendering
- G06T15/50—Lighting effects
- G06T15/80—Shading
- G06T15/87—Gouraud shading
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Abstract
The present invention provides a kind of arbitrary layer data display methods of volume data based on GPU operations and systems, read the DICOM data in CT or MRI data, the DICOM data include image data and information data；Multiple image datas are arranged into superposition layer by layer, form a square box；Key message needed for information data is read, and a cube is built according to the key message, the cubical length is equal to pel spacing * columns, wide equal to pel spacing * line numbers, high in the total numbers of plies of thickness *；The arbitrary tangent plane that volume data is indicated using a patch model, patch model is placed in the cube, and the actual physical location of the plane is the actual physical location for indicating tangent plane in volume data, renders patch model.Compared to the prior art, real-time of the present invention is high, and accuracy is high.
Description
Technical field
The present invention relates to technical field of medical image processing, and in particular, to the arbitrary tomography of volume data based on GPU operations
Data display method and system.
Background technology
The three-dimensional visualization method of medical image can substantially be divided into two classes：Iso-surface patch and volume drawing.Iso-surface patch method is first
Intermediate geometric graphic element is constructed by three dimensions, then carries out pattern drafting, can generate and compare clearly iso-surface images, speed
Than very fast.But the surface of this method intelligence represented object, has given up the bulk information of interior of articles, can not accurate description it is complicated
Human organ.And the characteristics of volume drawing, is based on directly on volume data and is shown, can obtain interior of articles information, calculation amount
Greatly, real-time rendering is very difficult.
Paper " arbitrary tangent of Chinese Digital human brain volume data is drawn " (http://www.ixueshu.com/
Document/d6f13b312228e5fd.html mathematical formulae) is used to calculate the figure of the arbitrary fault plane of volume data based on CPU
Picture, this method arithmetic speed cannot be satisfied real-time (the algorithm arithmetic speed based on CPU>10ms) and accuracy is (when resampling
Speed and precision can not ensure together).The when pixel particle that CPU is often calculated when calculating, i.e. a, if pictures are 256*256
Pixel generally rounds up and obtains when if necessary to obtain color of the coordinate for the point (such as coordinate (55.5,55.5)) of decimal
The color (for example coordinate (55.5,55.5) is rounded to (60,60)) of round numbers coordinate points, it is inaccurate, if using inserting
The coordinate that value-based algorithm calculates decimal point takes very much again.
Invention content
For the defects in the prior art, it is arbitrarily disconnected that the object of the present invention is to provide a kind of volume datas based on GPU operations
Layer data display methods and system.
According to a kind of arbitrary layer data display methods of volume data based on GPU operations provided by the invention, including：
DICOM data acquisition steps：The DICOM data in CT or MRI data are read, the DICOM data include picture
Data and information data；
It is superimposed step：Multiple image datas are arranged into superposition layer by layer, form a cuboid；
Cube construction step：Key message needed for information data is read, and one is built according to the key message
A cube, the cubical length is equal to pel spacing * columns, wide equal to pel spacing * line numbers, high in the total layers of thickness *
Number；
Patch model construction step：The arbitrary tangent plane that volume data is indicated using a patch model, by the dough sheet
Model is placed in the cube, and the actual physical location of the patch model is the reality for indicating tangent plane in volume data
Physical location renders the patch model.
Preferably, the DICOM data acquisition steps read the DICOM in CT or MRI data using DICOM processing plug-in units
Data.
Preferably, the patch model construction step renders the patch model using shader.
Preferably, the shader includes vertex shader and dough sheet tinter；
Vertex shader record vertex cuts spatial position, and the world space coordinate system position on record vertex
It sets；
The world coordinate space of the cuboid to object coordinates space conversion matrix is passed to institute by the dough sheet tinter
Shader is stated, by the world space coordinate on vertex by the matrix conversion to cubical object coordinates space, with the object
Body coordinate space reads the color data of volume data.
According to a kind of arbitrary layer data display system of volume data based on GPU operations provided by the invention, including：
DICOM data acquisition modules：The DICOM data in CT or MRI data are read, the DICOM data include picture
Data and information data；
Laminating module：Multiple image datas are arranged into superposition layer by layer, form a cuboid；
Cube builds module：Key message needed for information data is read, and one is built according to the key message
A cube, the cubical length is equal to pel spacing * columns, wide equal to pel spacing * line numbers, high in the total layers of thickness *
Number；
Patch model builds module：The arbitrary tangent plane that volume data is indicated using a patch model, by the dough sheet
Model is placed in the cube, and the actual physical location of the patch model is the reality for indicating tangent plane in volume data
Physical location renders the patch model.
Preferably, the DICOM data acquisition modules read the DICOM in CT or MRI data using DICOM processing plug-in units
Data.
Preferably, the patch model structure module renders the patch model using shader.
Preferably, the shader includes vertex shader and dough sheet tinter；
Vertex shader record vertex cuts spatial position, and the world space coordinate system position on record vertex
It sets；
The world coordinate space of the cuboid to object coordinates space conversion matrix is passed to institute by the dough sheet tinter
Shader is stated, by the world space coordinate on vertex by the matrix conversion to cubical object coordinates space, with the object
Body coordinate space reads the color data of volume data.
Compared with prior art, the present invention has following advantageous effect：
1, real-time is high：GPU is when handling parallel task relative to CPU will first-class hundred times, calculating volume data be arbitrary soon
One layer of tangent plane picture meets GPU processing rules, calculates image and takes in 10ms hereinafter, can meet doctor arbitrarily watches behaviour
Make, it is very smooth.
2, accuracy is high：Needing to round up when traditional CPU being avoided to obtain the color for the point that coordinate is decimal, it is whole to obtain
The defect of the color of number coordinate points, therefore sample fast and accurate.
Description of the drawings
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon：
Fig. 1 is the flow chart of the present invention；
Fig. 2 is the schematic diagram of the embodiment of the present invention.
Specific implementation mode
With reference to specific embodiment, the present invention is described in detail.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, several changes and improvements can also be made.These belong to the present invention
Protection domain.
As shown in Figure 1, the arbitrary layer data display methods of a kind of volume data based on GPU operations provided by the invention, packet
It includes：
DICOM data acquisition steps：The DICOM data in CT or MRI data are read, the DICOM data include picture
Data and information data.In the present embodiment, DICOM data acquisition steps read CT or MRI data using DICOM processing plug-in units
In DICOM data, but the present invention is not limited thereto.
It is superimposed step：Multiple image datas are arranged into superposition layer by layer, form a cuboid；
Cube construction step：As shown in Fig. 2, key message needed for information data is read, and according to the key
One cube of information architecture, the cubical length be equal to pel spacing * columns, it is wide be equal to pel spacing * line numbers, it is high in
The total numbers of plies of thickness *；
Patch model construction step：The arbitrary tangent plane that volume data is indicated using a patch model, by patch model
It is placed in the cube, the actual physical location of patch model is the actual physics position for indicating tangent plane in volume data
It sets, patch model is rendered using shader.
Shader includes vertex shader and dough sheet tinter；
Vertex shader record vertex cuts spatial position, and the world space coordinate system position on record vertex；
The world coordinate space of cuboid is passed to the shader by dough sheet tinter to object coordinates space conversion matrix,
By the world space coordinate on vertex by the matrix conversion to cubical object coordinates space, with the object coordinates space
Read the color data of volume data.It is implemented as follows：
Data are passed to the process of GPU from CPU
Matrix4x4childMatrix=new Matrix4x4 ()；
ChildMatrix.SetTRS (transform.Position, transform.Rotation,
transform.localScale)；
mat.SetMatrix("_LocalMatrix",childMatrix)。
On the basis of a kind of above-mentioned volume data based on GPU operations arbitrary layer data display methods, the present invention also carries
The arbitrary layer data display system of a kind of volume data based on GPU operations supplied, including：
DICOM data acquisition modules：The DICOM data in CT or MRI data are read, the DICOM data include picture
Data and information data.In the present embodiment, DICOM data acquisition modules read CT or MRI data using DICOM processing plug-in units
In DICOM data, but the present invention is not limited thereto.
Laminating module：Multiple image datas are arranged into superposition layer by layer, form a cuboid；
Cube builds module：As shown in Fig. 2, key message needed for information data is read, and according to the key
One cube of information architecture, the cubical length be equal to pel spacing * columns, it is wide be equal to pel spacing * line numbers, it is high in
The total numbers of plies of thickness *；
Patch model builds module：The arbitrary tangent plane that volume data is indicated using a patch model, by patch model
It is placed in the cube, the actual physical location of patch model is the actual physics position for indicating tangent plane in volume data
It sets, patch model is rendered using shader.
Shader includes vertex shader and dough sheet tinter；
Vertex shader record vertex cuts spatial position, and the world space coordinate system position on record vertex；
The world coordinate space of cuboid is passed to the shader by dough sheet tinter to object coordinates space conversion matrix,
By the world space coordinate on vertex by the matrix conversion to cubical object coordinates space, with the object coordinates space
Read the color data of volume data.It is implemented as follows：
Data are passed to the process of GPU from CPU
Matrix4x4childMatrix=new Matrix4x4 ()；
ChildMatrix.SetTRS (transform.Position, transform.Rotation,
transform.localScale)；
mat.SetMatrix("_LocalMatrix",childMatrix)。
One skilled in the art will appreciate that in addition to realizing system provided by the invention in a manner of pure computer readable program code
It, completely can be by the way that method and step be carried out programming in logic come so that the present invention provides and its other than each device, module, unit
System and its each device, module, unit with logic gate, switch, application-specific integrated circuit, programmable logic controller (PLC) and embedding
Enter the form of the controller that declines etc. to realize identical function.So system provided by the invention and its every device, module, list
Member is considered a kind of hardware component, and also may be used for realizing the device of various functions, module, unit to include in it
To be considered as the structure in hardware component；It can also will be considered as realizing the device of various functions, module, unit either real
The software module of existing method can be the structure in hardware component again.
In the description of the present application, it is to be understood that term "upper", "front", "rear", "left", "right", " is erected at "lower"
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "top", "bottom", "inner", "outside" is orientation based on ... shown in the drawings or position
Relationship is set, description the application is merely for convenience of and simplifies to describe, do not indicate or imply the indicated device or element is necessary
With specific orientation, with specific azimuth configuration and operation, therefore should not be understood as the limitation to the application.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make a variety of changes or change within the scope of the claims, this not shadow
Ring the substantive content of the present invention.In the absence of conflict, the feature in embodiments herein and embodiment can arbitrary phase
Mutually combination.
Claims (8)
1. a kind of arbitrary layer data display methods of volume data based on GPU operations, which is characterized in that including：
DICOM data acquisition steps：The DICOM data in CT or MRI data are read, the DICOM data include image data
And information data；
It is superimposed step：Multiple image datas are arranged into superposition layer by layer, form a cuboid；
Cube construction step：Key message needed for information data is read, and builds one according to the key message and stands
Cube, the cubical length is equal to pel spacing * columns, wide equal to pel spacing * line numbers, high in the total numbers of plies of thickness *；
Patch model construction step：The arbitrary tangent plane that volume data is indicated using a patch model, by the patch model
It is placed in the cube, the actual physical location of the patch model is the actual physics for indicating tangent plane in volume data
Position renders the patch model.
2. the arbitrary layer data display methods of the volume data according to claim 1 based on GPU operations, which is characterized in that
The DICOM data acquisition steps read the DICOM data in CT or MRI data using DICOM processing plug-in units.
3. the arbitrary layer data display methods of the volume data according to claim 1 based on GPU operations, which is characterized in that
The patch model construction step renders the patch model using shader.
4. the arbitrary layer data display methods of the volume data according to claim 3 based on GPU operations, which is characterized in that
The shader includes vertex shader and dough sheet tinter；
Vertex shader record vertex cuts spatial position, and the world space coordinate system position on record vertex；
The dough sheet tinter is incoming described to object coordinates space conversion matrix by the world coordinate space of the cuboid
Shader, by the world space coordinate on vertex by the matrix conversion to cubical object coordinates space, with the object
Coordinate space reads the color data of volume data.
5. a kind of arbitrary layer data display system of volume data based on GPU operations, which is characterized in that including：
DICOM data acquisition modules：The DICOM data in CT or MRI data are read, the DICOM data include image data
And information data；
Laminating module：Multiple image datas are arranged into superposition layer by layer, form a cuboid；
Cube builds module：Key message needed for information data is read, and builds one according to the key message and stands
Cube, the cubical length is equal to pel spacing * columns, wide equal to pel spacing * line numbers, high in the total numbers of plies of thickness *；
Patch model builds module：The arbitrary tangent plane that volume data is indicated using a patch model, by the patch model
It is placed in the cube, the actual physical location of the patch model is the actual physics for indicating tangent plane in volume data
Position renders the patch model.
6. the arbitrary layer data display system of the volume data according to claim 5 based on GPU operations, which is characterized in that
The DICOM data acquisition modules read the DICOM data in CT or MRI data using DICOM processing plug-in units.
7. the arbitrary layer data display system of the volume data according to claim 5 based on GPU operations, which is characterized in that
The patch model structure module renders the patch model using shader.
8. the arbitrary layer data display system of the volume data according to claim 7 based on GPU operations, which is characterized in that
The shader includes vertex shader and dough sheet tinter；
Vertex shader record vertex cuts spatial position, and the world space coordinate system position on record vertex；
The dough sheet tinter is incoming described to object coordinates space conversion matrix by the world coordinate space of the cuboid
Shader, by the world space coordinate on vertex by the matrix conversion to cubical object coordinates space, with the object
Coordinate space reads the color data of volume data.
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| CN102096948A (en) * | 2011-03-01 | 2011-06-15 | 西安邮电学院 | Meshsing method suitable for graphics hardware |
| CN105825471A (en) * | 2016-03-13 | 2016-08-03 | 华东理工大学 | Unity-3D-based three-dimensional surface reconstruction and rendering method |
| CN106709240A (en) * | 2016-12-01 | 2017-05-24 | 彭志勇 | Medical DICOM (Digital Imaging and Communications in Medicine) image display method |
| CN107492138A (en) * | 2017-08-25 | 2017-12-19 | 上海嘉奥信息科技发展有限公司 | Body renders the seamless combination rendered with face and its collision checking method |
-
2018
- 2018-05-08 CN CN201810433137.4A patent/CN108597590A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101520900A (en) * | 2009-03-30 | 2009-09-02 | 中国人民解放军第三军医大学第一附属医院 | Method and special equipment for quickening CR/DR/CT graphic display and graphic processing by utilizing GPU |
| CN102096948A (en) * | 2011-03-01 | 2011-06-15 | 西安邮电学院 | Meshsing method suitable for graphics hardware |
| CN105825471A (en) * | 2016-03-13 | 2016-08-03 | 华东理工大学 | Unity-3D-based three-dimensional surface reconstruction and rendering method |
| CN106709240A (en) * | 2016-12-01 | 2017-05-24 | 彭志勇 | Medical DICOM (Digital Imaging and Communications in Medicine) image display method |
| CN107492138A (en) * | 2017-08-25 | 2017-12-19 | 上海嘉奥信息科技发展有限公司 | Body renders the seamless combination rendered with face and its collision checking method |
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