Processing CT scan of dental impression
A computer-implemented method and system of determining a material surface from a volumetric density file includes generating a density frequency distribution of a volumetric density file of a dental impression and determining an iso-value of density between air and a particular material in the density frequency distribution. A computer-implemented method and system of creating a digital model from a CT scan of a physical dental impression includes selecting an iso-value of density for a digital volumetric density file having one or more voxels, generating one or more digital surface points in virtual 3D space for each of one or more voxels, and selecting a subset of digital surface points from the one or more digital surface points. A computer-implemented method and system of optimizing a digital surface includes moving one or more digital surface points to satisfy a criteria of optimum digital surface selection.
1. A computer-implemented method of creating a digital model from a CT scan of a physical dental impression, the computer-implemented method comprising:
selecting an iso-value of density for a digital volumetric density file comprising one or more voxels;
generating one or more digital surface points in virtual 3D space for each of one or more voxels; and
selecting a subset of digital surface points from the one or more digital surface points
wherein the one or more digital surface points in virtual 3D space comprise a point cloud, and
wherein selecting the subset of digital surface points comprises reducing the point cloud based on a desired level of distance between two or more of the subset of digital surface points.
2. The method of claim 1 , further comprising performing triangulation on the subset of digital surface points.
3. The method of claim 1 , wherein selecting the desired level of distance between two or more of the subset of digital surface points comprises setting a user-configurable minimum distance between the two or more of the subset of digital surface points.
4. The method of claim 1 , wherein selecting the desired level of distance between two or more of the subset of digital surface points comprises selecting to a desired level based on curvature.
5. The method of claim 2 , wherein performing triangulation on the subset of digital surface points comprises excluding one or more noisy regions.
6. The method of claim 1 , further comprising scanning a physical dental impression in a CT scanner to generate the volumetric density file.
7. The method of claim 1 , further comprising receiving the volumetric density file.
8. The method of claim 1 , further comprising:
selecting a criteria of digital surface optimization on the subset of digital surface points; and
moving one or more digital surface points to satisfy the criteria of optimum digital surface selection.
9. The method of claim 8 , wherein the criteria of optimum digital surface selection comprises a maximum of density derivative along a normal of each digital surface point of the digital surface points.
10. The method of claim 9 , wherein moving the one or more digital surface points comprises moving one or more digital surface points to the maximum of density derivative.
11. A digital impression processing system for creating a digital model from a CT scan of a physical dental impression, comprising:
a processor;
a computer-readable storage medium comprising instructions executable by the processor to perform steps comprising:
selecting an iso-value of density for a digital volumetric density file comprising one or more voxels;
generating one or more digital surface points in virtual 3D space for each of one or more voxels; and
selecting a subset of digital surface points from the one or more digital surface points
wherein the one or more digital surface points in virtual 3D space comprise a point cloud, and
wherein selecting the subset of digital surface points comprises reducing the point cloud based on a desired level of distance between two or more of the subset of digital surface points.
12. The system of claim 11 , wherein the instructions executable by the processor to perform steps further comprising performing triangulation on the subset of digital surface points.
13. The system of claim 11 , wherein selecting the desired level of distance between two or more of the subset of digital surface points comprises setting a user-configurable minimum distance between the two or more of the subset of digital surface points.
14. The system of claim 11 , wherein selecting the desired level of distance between two or more of the subset of digital surface points comprises selecting to a desired level based on curvature.
15. The system of claim 12 , wherein performing triangulation on the subset of digital surface points comprises excluding one or more noisy regions.
16. The system of claim 11 , wherein the instructions executable by the processor to perform steps further comprising scanning a physical dental impression in a CT scanner to generate volumetric density file.
17. The system of claim 11 , wherein the instructions executable by the processor to perform steps further comprising receiving the volumetric density file.
18. The system of claim 11 , wherein the instructions executable by the processor to perform steps further comprising:
selecting a criteria of digital surface optimization on the subset of digital surface points; and
moving one or more digital surface points to satisfy the criteria of optimum digital surface selection.
19. The system of claim 18 , wherein the criteria of optimum digital surface selection comprises a maximum of density derivative along a normal of each digital surface point of the digital surface points.
20. The system of claim 18 , wherein moving the one or more digital surface points comprises moving one or more digital surface points to the maximum of density derivative.
21. A non-transitory computer readable medium storing executable computer program instructions for creating a digital model from a CT scan of a physical dental impression, the computer program instructions comprising instructions for:
selecting an iso-value of density for a digital volumetric density file comprising one or more voxels;
generating one or more digital surface points in virtual 3D space for each of one or more voxels; and
selecting a subset of digital surface points from the one or more digital surface points,
wherein the one or more digital surface points in virtual 3D space comprise a point cloud, and
wherein selecting the subset of digital surface points comprises reducing the point cloud based on a desired level of distance between two or more of the subset of digital surface points.