Method and apparatus for detecting the three-dimensional position of an examination instrument inserted into a body region
US6810280B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 23, 2002 |
| Grant date | Oct 26, 2004 |
| Priority date | — |
| Expiry date | Aug 23, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B90/39
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method for detecting the three-dimensional position of an examination instrument inserted into a body region, on which instrument there are provided three markings whose mutual geometric arrangement is known, by using a device for recording radiation images with the aid of a radiation source and a radiation receiver, includes the steps of, recording two-dimensional projection image of the body region, determining the positions (ui, vi) of the three markings in the projection image, and determining the spatial coordinates (xi, yi, zi) of the three markings in the coordinate system of the recording device with the aid of the positions (ui, vi) and the projection matrix belonging to the projection image, taking into account the known mutual geometric arrangement of the markings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.