Method and system for characterizing and visualizing electromagnetic tracking errors
US9165114B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 2011 |
| Grant date | Oct 20, 2015 |
| Priority date | — |
| Expiry date | Nov 27, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2034/2051
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A calibration/surgical tool includes an electromagnetic sensor array of two or more electromagnetic sensors in a known geometrical configuration. Electromagnetic tracking errors are characterized by a mapping of pre-operative absolute and relative errors based on a movement of a calibrated calibration/surgical tool through a pre-operative electromagnetic field. Using statistical mapping, a desired absolute error field is measured either in the clinic as the part of daily quality control checks, or before the patient comes in or in vivo. A resulting error field may be displayed to the physician to provide clear visual feedback about measurement confidence or reliability of localization estimates of the absolute errors in electromagnetic tracking.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.