CN105653887A - Method for recovering damaged skeleton model based on parametric template - Google Patents
Method for recovering damaged skeleton model based on parametric template Download PDFInfo
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- CN105653887A CN105653887A CN201610179053.3A CN201610179053A CN105653887A CN 105653887 A CN105653887 A CN 105653887A CN 201610179053 A CN201610179053 A CN 201610179053A CN 105653887 A CN105653887 A CN 105653887A
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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
- G16H50/00—ICT specially adapted for medical diagnosis, medical simulation or medical data mining; ICT specially adapted for detecting, monitoring or modelling epidemics or pandemics
- G16H50/50—ICT specially adapted for medical diagnosis, medical simulation or medical data mining; ICT specially adapted for detecting, monitoring or modelling epidemics or pandemics for simulation or modelling of medical disorders
Abstract
The invention discloses a method for recovering a damaged skeleton model based on a parametric template. The method comprises the following steps: a first step of constructing a parametric skeleton template having a hierarchical structure, wherein parameters comprise a model parameter, a characteristic parameter and a local detail parameter; a second step of extracting measurement parameters of a damaged skeleton block and corresponding geometric information; a third step of establishing constraint relations between the parameters, and generating a skeleton recovery model after inputting the measurement parameters into the corresponding parametric skeleton template. According to the method, by measuring part of parameters of the damaged skeleton block, and the shape of the skeleton model is recovered visually and quickly, so as to facilitate preoperative operation on a patient with damaged skeletons.
Description
Technical field
The present invention relates to a kind of numeral skeleton model reconstruction technique, it is specifically related to a kind of affected bone model recovery method based on parameterized template, the invention belongs to field of computer aided design.
Background technology
Along with developing rapidly of computer aided design (CAD) and orthopaedics digitizing technology, computer aided orthopedics operation becomes field with the fastest developing speed. The personalized Steel Plate For Fixation Of Fracture design etc. utilizing relevant Computer-aided Design Technology to carry out affected bone recovery and later stage thereof is studied and is received extensive attention at home and abroad. The fracture of bone and impaired be most commonly encountered diseases example in orthopaedics surgical operation, it is various and complex structure with the skeletal shape of free curved surface, and bone restoration is one of major issue of digital orthopaedic technical study. Common method for reconstructing is: first the CT/MRI data block obtained is carried out three-dimensional reconstruction; Then each data block is carried out geometry or manual type splicing; Finally to the model generation skeleton model after Registration and connection. Its shortcoming mainly comprises: it is geometric operation, and calculated amount is big and lacks semantic information; It is difficult to the affected bone data with disappearance restore simultaneously, and it is difficult to impaired deformation data block is carried out accuracy registration splicing.
Summary of the invention
For solving the deficiencies in the prior art, it is an object of the invention to provide a kind of affected bone model recovery method based on parameterized template, intuitively restore the shape of skeleton model based on parameterized template quickly.
In order to realize above-mentioned target, the present invention adopts following technical scheme:
Based on an affected bone model recovery method for parameterized template, comprise the steps:
Step one: building the parametrization bone template with hierarchical structure, parameter comprises: model parameter, characteristic parameter, local detail parameter.
Step 1a: Modling model parameter, model parameter is the parameter between multiple feature, for describing the global shape of skeleton model;
Step 1b: set up characteristic parameter, characteristic parameter is the parameter in a feature, for describing the shape of feature;
Step 1c: set up local detail parameter, local detail parameter is the detailed shape for describing feature.
Step 2: extract the measuring parameter of affected bone block and corresponding geological information.
Step 2a: obtaining measuring parameter is semantic parameter affected bone measured and corresponding geological information;
Step 2b: characteristic parameter, the local detail parameter comprising the model parameter of affected bone and affected bone block according to measuring parameter in step 2a.
Step 3: the constraint relation between the parameter of establishment step one, after the measuring parameter of step 2 is input to corresponding parametrization bone template, generates bone restoration model.
Step 3a: the constraint relation between the parameter of step one comprises: the constraint relation between model parameter and model parameter, the constraint relation between model parameter and characteristic parameter, and the parameter constraint relation between feature;
Other parameters are not retrained relation by step 3b: local detail parameter has relative independentability, only for describing self local detail.
In abovementioned steps 1a, described model parameter is based upon on the piecemeal basis of skeleton character model, and namely a model is made up of multiple feature; Model parameter is defined in the semantic parameter of more than two features or two features.
In abovementioned steps 2a, described semantic parameter and corresponding geological information refer to: measure the information such as place block in affected bone of the parameter and this parameter thereof in affected bone with medical significance, geometric position.
In abovementioned steps 3a, the constraint relation between described parameter refers to the mutual relationship between each layer parameter, and model parameter is positioned at high level and is had an impact by its characteristic parameter; Characteristic parameter is positioned at middle layer, affects model parameter simultaneously; Local detail parameter is positioned at bottom, characteristic parameter and model parameter is not affected.
The usefulness of the present invention is: a kind of affected bone model recovery method based on parameterized template of the present invention, running efficiency of system height, by measuring the partial parameters of affected bone block, intuitively restores the shape of skeleton model quickly. The present invention is applied to Medical orthopaedic operation and manufactures field with medical devices, it is possible to intuitively, accurately is restored bone curved-surface shape by parameter, bone damage patient is carried out pre-operative surgical significant.
Accompanying drawing explanation
Fig. 1 is a kind of affected bone model recovery method flow diagram based on parameterized template in the present invention;
Fig. 2 is bone template model parametrization identification schematic diagram in the present invention;
Fig. 3 is that in the present invention, bone template characteristic parametrization first identifies schematic diagram;
Fig. 4 is that in the present invention, bone template characteristic parametrization the 2nd identifies schematic diagram;
Fig. 5 is that in the present invention, bone template characteristic parametrization the 3rd identifies schematic diagram;
Fig. 6 is bone template local detail parametrization identification schematic diagram in the present invention;
Fig. 7 is the measuring parameter schematic diagram extracting affected bone block in the present invention;
Fig. 8 is the corresponding geological information schematic diagram extracting affected bone block in the present invention;
Fig. 9 is affected bone restoration model schematic diagram in the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention done concrete introduction.
With reference to, shown in Fig. 1, a kind of affected bone model recovery method based on parameterized template of the present invention, comprises the steps:
Step one: building the parametrization bone template with hierarchical structure, parameter comprises: model parameter, characteristic parameter, local detail parameter.
Step 2: extract the measuring parameter of affected bone block and corresponding geological information.
Step 3: the constraint relation between the parameter of establishment step one, after the measuring parameter of step 2 is input to corresponding parametrization bone template, generates bone restoration model.
First, building the parametrization bone template with hierarchical structure, wherein parameter comprises model parameter, characteristic parameter and local detail parameter, comprises the following steps:
Step 1a: Modling model parameter, model parameter is the parameter between multiple feature, for describing the global shape of skeleton model;Model parameter is based upon on the piecemeal basis of skeleton character model, and namely a model is made up of multiple feature; Model parameter is defined in the semantic parameter of more than two features or two features;
Step 1b: set up characteristic parameter, characteristic parameter is the parameter in a feature, for describing the shape of feature;
Step 1c: set up local detail parameter, local detail parameter is the detailed shape for describing feature.
Then, extract the measuring parameter of affected bone block and corresponding geological information, comprise the following steps:
Step 2a: obtaining measuring parameter is semantic parameter affected bone measured and corresponding geological information; Semantic parameter and corresponding geological information refer to: measure the information such as place block in affected bone of the parameter and this parameter thereof in affected bone with medical significance, geometric position;
Step 2b: characteristic parameter, the local detail parameter comprising the model parameter of affected bone and affected bone block according to measuring parameter in step 2a.
Finally, set up the constraint relation between parameter, after measuring parameter is input to corresponding parametrization bone template, generates bone restoration model, comprise the following steps:
Step 3a: the constraint relation between the parameter of step one comprises: the constraint relation between model parameter and model parameter, the constraint relation between model parameter and characteristic parameter, and the parameter constraint relation between feature; Constraint relation between parameter refers to the mutual relationship between each layer parameter, and model parameter is positioned at high level and is had an impact by its characteristic parameter; Characteristic parameter is positioned at middle layer, affects model parameter simultaneously; Local detail parameter is positioned at bottom, characteristic parameter and model parameter is not affected;
Other parameters are not retrained relation by step 3b: local detail parameter has relative independentability, only for describing self local detail.
As shown in Figure 2, building parametrization bone template, first Modling model parameter, model parameter is the parameter between multiple feature, for describing the global shape of skeleton model; Model parameter is based upon on the piecemeal basis of skeleton character model, and namely a model is made up of multiple feature; Model parameter is defined in the semantic parameter of more than two features or two features; For radius, radius is defined as four major portions, i.e. radius head radius neck, radius tuberosity, radius body and radius belemnoid.
As shown in Figure 3, setting up characteristic parameter, characteristic parameter is the parameter in a feature, for describing the shape of feature. For radius, the characteristic parameter such as radius defining the height of radius head, the height of radius neck, radius head radius, radius neck in radius head radius neck; As shown in Figure 4, in radius tuberosity, define the characteristic parameter such as the height of radius tuberosity, the radius of radius tuberosity; As shown in Figure 5, define in radius belemnoid radius belemnoid most degree of growing tall, the radius belemnoid characteristic parameter such as short height.
As shown in Figure 6, setting up local detail parameter, local detail parameter is the detailed shape for describing feature. For radius, in radius head, define that radius head is recessed waits local detail parameter with radius top distance.
As shown in Figure 7, obtain measuring parameter, measure the parameter in affected bone with medical significance. For radius, measure the height of impaired radius, the parameter such as the height of radius head, radius neck.
As shown in Figure 8, measure the information such as affected bone place block, geometric position, for radius, the geological informations such as the fracture line of extraction affected bone.
As shown in Figure 9, by the constraint relation set up between parameter, after measuring parameter is input to corresponding parametrization bone template, generate bone restoration model.
What the present invention did not illustrate further is prior art.
The present invention gives a kind of affected bone model recovery method based on parameterized template. First, building the parametrization bone template with hierarchical structure, wherein parameter comprises model parameter, characteristic parameter and local detail parameter; Then, extract the measuring parameter of affected bone block and corresponding geological information; Finally, set up the constraint relation between parameter, after measuring parameter is input to corresponding parametrization bone template, generate bone restoration model. The present invention, by measuring the partial parameters of affected bone block, intuitively restores the shape of skeleton model, quickly so that bone damage patient is carried out pre-operative surgical.
More than show and describe the ultimate principle of the present invention, main feature and advantage. The technician of the industry is not it should be understood that above-described embodiment limits the present invention in any form, and all employings are equal to the technical scheme that the mode of replacement or equivalent transformation obtains, and all drop on protection scope of the present invention.
Claims (7)
1., based on an affected bone model recovery method for parameterized template, comprise the steps:
Step one: building the parametrization bone template with hierarchical structure, parameter comprises: model parameter, characteristic parameter, local detail parameter;
Step 2: extract the measuring parameter of affected bone block and corresponding geological information;
Step 3: the constraint relation between the parameter of establishment step one, after the measuring parameter of step 2 is input to corresponding parametrization bone template, generates bone restoration model.
2. a kind of affected bone model recovery method based on parameterized template according to claim 1, it is characterised in that, described step one comprises:
Step 1a: Modling model parameter, model parameter is the parameter between multiple feature, for describing the global shape of skeleton model;
Step 1b: set up characteristic parameter, characteristic parameter is the parameter in a feature, for describing the shape of feature;
Step 1c: set up local detail parameter, local detail parameter is the detailed shape for describing feature.
3. a kind of affected bone model recovery method based on parameterized template according to claim 2, it is characterised in that, described step 2 comprises:
Step 2a: obtaining measuring parameter is semantic parameter affected bone measured and corresponding geological information;
Step 2b: characteristic parameter, the local detail parameter comprising the model parameter of affected bone and affected bone block according to measuring parameter in step 2a.
4. a kind of affected bone model recovery method based on parameterized template according to claim 1, it is characterised in that, described step 3 comprises:
Step 3a: the constraint relation between parameter comprises: the constraint relation between model parameter and model parameter, the constraint relation between model parameter and characteristic parameter, and the parameter constraint relation between feature;
Other parameters are not retrained relation by step 3b: local detail parameter has relative independentability, only for describing self local detail.
5. a kind of affected bone model recovery method based on parameterized template according to claim 2, it is characterised in that, in step 1a, described model parameter is based upon on the piecemeal basis of skeleton character model, and namely a model is made up of multiple feature; Model parameter is defined in the semantic parameter of more than two features or two features.
6. a kind of affected bone model recovery method based on parameterized template according to claim 3, it is characterized in that, in described step 2a, described semantic parameter and corresponding geological information refer to: the information measuring place block in affected bone of the parameter and this parameter thereof in affected bone with medical significance, geometric position.
7. a kind of affected bone model recovery method based on parameterized template according to claim 4, it is characterized in that, in step 3a, the constraint relation between the parameter of described step one refers to the mutual relationship between each layer parameter, and model parameter is positioned at high level and is had an impact by its characteristic parameter; Characteristic parameter is positioned at middle layer, affects model parameter simultaneously; Local detail parameter is positioned at bottom, characteristic parameter and model parameter is not affected.
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| CN106963489A (en) * | 2017-05-12 | 2017-07-21 | 常州工程职业技术学院 | A kind of individuation femoral fracture reset model construction method |
| CN108597017A (en) * | 2018-04-19 | 2018-09-28 | 河海大学常州校区 | A kind of textured bone template construction method based on measurement parameter |
| US10963682B2 (en) | 2017-12-08 | 2021-03-30 | Huawei Technologies Co., Ltd. | Skeleton posture determining method and apparatus, and computer readable storage medium |
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