| 摘要 |
The general field of the invention is that of tomographs comprising at least one first emission source (GX1), one first matrix detector (D1) and calculation means(C), arranged to produce an initial tomograph of an object (E) from radiographs coming from a first matrix detector and taken at various angles. The tomograph according to the invention comprises a second emission source (GX2) and a second matrix detector (D2) arranged in such a way that, when the object is subject to a known stress at a given time, said stress being potentially a mechanical stress or a two-phase fluid flow in a porous medium, the calculation means determine the changes to the object subjected to said stress using only knowledge from a first radiograph of the stressed object coming from the first matrix detector, from a second radiograph of the stressed object coming from the second matrix detector and from the initial tomograph, the first radiograph and second radiograph being taken at the same given time. |
