Registration of 4th generation detectors relative to the 3rd generation CT system coordinates using 4th generation sinogram data
US9155515B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 26, 2014 |
| Grant date | Oct 13, 2015 |
| Priority date | — |
| Expiry date | Apr 13, 2034 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B6/587
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method is provided for determining, for a fourth-generation computed tomography (CT) scanner that includes a third-generation X-ray source and detector system and a plurality fixed, sparse photon-counting detectors (PCDs), a position of each PCD of the plurality of PCDs. The method includes determining, for a given PCD, a set of view angles at which the PCD will cast a shadow on the third-generation detector; determining, for each view, by analyzing projection data obtained from a reference scan, a corresponding shadow location on the third-generation detector caused by the given PCD; generating, for each view, a line connecting a position of the X-ray source at the view angle, and a corresponding shadow location of the set of shadow locations; determining locations of all intersection points of the set of lines; and determining a PCD centerline of the given PCD based on the locations of the intersection points.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.