Process for the reconstruction of a 3D image with contrast and resolution improvements and application of said process to the production of an attentuation cartography of an object
US5930384A · kind A · utility
Inventors
Key dates
| Filing date | Aug 21, 1997 |
| Grant date | Jul 27, 1999 |
| Priority date | — |
| Expiry date | Aug 21, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2211/424
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A three-dimensional image of an object is constructed by a process using values assumed by a property of the object in an array of elementary volumes of the object. The process determines the measured projections of the property and reconstructs the three-dimensional image of the object by iteration. The iteration includes steps of carrying out a reconstruction of a first three dimensional image of the object, estimating local parameters defining an anisotropic model of the object as a function of the reconstructed three-dimensional image, deducing calculated projections of the property passing through at least one elementary volume, comparing at least one calculated projection with the measured projection in order to deduce therefrom a projection difference, determining a weighting factor, and performing an updating of each elementary volume.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.