Thread lift plastic surgery simulation system
A plastic surgery and simulation system technology, applied in the field of virtual surgery system modeling, can solve the problems of few plastic surgery training systems and few simulation systems, and achieve the effects of reducing costs, reducing time and memory usage, and improving the success rate
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specific Embodiment approach 1
[0025] Specific implementation mode one: as figure 1 As shown, a thread embedding lifting plastic surgery simulation system described in this embodiment includes: human face geometric modeling module 1, human facial tissue physical modeling module 2, collision detection module 3, visualization module 4, force feedback module 5 , Auxiliary module 6.
[0026] The human face geometric modeling module 1 is used to generate a virtual three-dimensional geometric model of the human face, and provide users with surgical training objects in a virtual environment. The geometric modeling module 1 of the human face is also used to import the two-dimensional tomographic image data of the human face, and perform threshold screening, interactive segmentation and three-dimensional surface model reconstruction of the two-dimensional tomographic image data of the human face. The human face geometric modeling module 1 is also used for solid mesh division (tetrahedral mesh) of the three-dimensio...
specific Embodiment approach 2
[0032] Specific implementation mode two: as figure 2 As shown, the concrete process that the human facial geometry modeling module 1 described in this embodiment realizes its function is:
[0033] 1) Three-dimensional reconstruction of the geometric model of the human face
[0034] First, import the two-dimensional tomographic image data of the human face. The two-dimensional tomographic image can be in the DICOM format of CT or MRI, or in common formats such as jpg and png. Then based on the MITK class library, according to the characteristics of different gray value ranges of bone tissue and soft tissue in the imported image data, threshold screening is performed to initially segment the bone tissue and soft tissue parts in the two-dimensional tomographic image. Interactive segmentation is then performed to manually erase and fill in parts of the image where the tissue does not match the actual anatomy. Finally, based on the MC algorithm, a three-dimensional surface model...
specific Embodiment approach 3
[0040] Specific implementation mode three: as image 3 As shown, the concrete process that the human facial tissue physical modeling module 2 described in this embodiment realizes its function is:
[0041] In the present invention, the bone tissue of the face of the human body is considered as a rigid body without deformation. The biomechanical model of the soft tissue deformed before being punctured by the needle adopts the Mooney-Rivlin hyperelastic model, and the specific form of the soft tissue model is shown in formula (1):
[0042] (1)
[0043] where W is the strain energy density function; and is the model material constant; and are the first and second principal invariants of the strain tensor.
[0044] Combined with formula (1), the grid node displacement of human facial soft tissue under the external load and constraint conditions is calculated by the finite element method, and the specific calculation is realized by C++ language programming on the VS pl...
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