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US 2021/0201596 A1Published application
Method for producing a digital representation for producing an appliance for a living body and corresponding device
AssigneeProteor
InventorsBriac COLOBERT, Jean-Charles GESBERT, Vincent CARRE
Life of this patent
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Abstract
The invention relates to a method for producing a digital representation for producing an appliance for a living body, particularly to be applied against the external surface of the living body. The invention is particularly intended for the production of orthoses and prostheses. The method according to the invention allows the digital representation of an appliance using a modelling of the internal and external structures of the living body to be fitted with an appliance.
Claims16
A method for producing a digital representation for producing an appliance adapted to an object forming a part at least of a living body, comprising:
- (1) receiving a first three-dimensional model of the internal and external structure of the object in a first three-dimensional frame of reference,
- (2) receiving a second three-dimensional model of the appliance to be produced defining at least one set of characteristic functional zones of the appliance, and, optionally a contour of the appliance, the second model comprising representative data:
- of coordinates in a second three-dimensional frame of reference of edge points belonging to the edge of a functional zone and of vertex points representing vertices of a functional zone.
- of a value of a deformation parameter, representative of the deformation of the functional zone, associated with each vertex point,
- optionally, of the coordinates in the second frame of reference of contour points or lines of the appliance,
- (3) modifying the second model by applying to the points of the model a transformation matrix which expresses the coordinates of these points in the first frame of reference,
- (4) calculating for each functional zone of the second model:
- an edge curve passing through the edge points,
- a vertex curve passing through the vertex points,
- (5) transferring to the first model the edge curves, the vertex curves and the deformation parameter values associated with each vertex point of the second model, and optionally the contour points or lines of the appliance,
- (6) deforming the external surface of the first model according to the vertex curves to shape the external surface of the first model to the shape of the second model in each functional zone and obtain a corrected first model,
- (7) optionally, displaying a graphic representation of the corrected first model,
- (8) saving the corrected first model in a computer memory as the final model.
10 more elements
A device for producing a digital representation for producing an appliance adapted to an object forming a part at least of a living body, comprising:
- means for receiving a first three-dimensional model of the internal and external structure of the object in a first three-dimensional frame of reference,
- means for receiving a second three-dimensional model of the appliance to be produced defining at least one set of characteristic functional zones of the appliance, and, optionally a contour of the appliance, the second model comprising representative data:
- of coordinates in a second three-dimensional frame of reference of edge points belonging to the edge of a functional zone and of vertex points representing vertices of a functional zone.
- of a value of a deformation parameter, representative of the deformation of the functional zone, associated with each vertex point,
- optionally, of the coordinates in the second frame of reference of contour points or lines of the appliance,
- means for modifying the second model by applying to the points of the model a transformation matrix which expresses the coordinates of these points in the first frame of reference,
- means for calculating, for each functional zone of the second model:
- an edge curve passing through the edge points,
- a vertex curve passing through the vertex points,
- means for transferring to the first model the edge curves, the vertex curves and deformation parameter values associated with each vertex point of the second model, and optionally contour points or lines of the appliance,
- means for deforming the external surface of the first model using the vertex curves to shape the external surface of the first model to the shape of the second model in each functional zone and obtain a corrected first model,
- means for displaying a graphic representation of the corrected first model,
- means for saving the corrected first model in a computer memory as the final model.
10 more elements
Dependencies are inferred from the claim text.