Geometric calibration method and system for dual axis digital tomosynthesis
US10925572B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 2020 |
| Grant date | Feb 23, 2021 |
| Priority date | — |
| Expiry date | Feb 20, 2040 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B6/502
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A geometric calibration method for dual-axis digital tomosynthesis includes the steps of: providing a calibration phantom having a first plate, a second plate parallel to the first plate, and mark points distributed to the first and second plates; arranging any mark point at the first plate not to be vertically collinear with a mark point at the second plate; projecting the calibration phantom onto a planar detector to obtain a projected calibration-phantom image; deriving a conversion relationship between the mark point and the corresponding projected position at the planar detector to further establish a projection matrix related to an imaging system; and, applying the projection matrix to calculate a plurality of geometric parameters. In addition, a geometric calibration system for dual-axis digital tomosynthesis is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.