Automatically determining 3D catheter location and orientation using 2D fluoroscopy only
US10881316B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 2018 |
| Grant date | Jan 5, 2021 |
| Priority date | — |
| Expiry date | Mar 19, 2038 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2090/376
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method for automatically determining the 3D position and orientation of a radio-opaque medical object in a living body using single-plane fluoroscopy comprising: (a) capturing a stream of digitized 2D images from a single-plane fluoroscope; (b) detecting an image of the medical object in a subset of the digital 2D images; (c) applying to the digital 2D images calculations which preserve original pixel intensity values and permit statistical calculations thereon, using (i) multiple sequential determinations of a midline of the medical object image, (ii) a plurality of unfiltered raw-data cross-sectional intensity profiles perpendicular to each sequentially-determined midline, (iii) removal of outlier profiles from each plurality of profiles, and (iv) statistically combining each plurality of profiles to estimate image dimensions; (d) applying conical projection and radial elongation corrections to the image measurements; and (e) calculating the 3D position and orientation of the medical object from the corrected 2D image measurements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.