Imaging method, controller and imaging system, for monitoring a patient post EVAR
US11298096B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 12, 2018 |
| Grant date | Apr 12, 2022 |
| Priority date | — |
| Expiry date | Dec 13, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG16H50/50
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention provides a method of patient monitoring following endovascular aneurysm repair (EVAR) with a stent graft. It particularly applies to abdominal aortic aneurysm repair. A first 3D volume scan of the stent in situ is provided and a second, subsequent 3D volume scan of the stent is also provided. One or more fiducial markers are generated in a first image derived from the first scan and in a second image derived from the second scan. The fiducial markers identify recognizable features of the stent, such as the bifurcation point in the stent graft. A rigid 3D transform mapping based on the one or more fiducial markers is extracted and then a registration is applied to the first and second scans based on the 3D rigid transform between the first and second images. A size value is derived at the same location in the aneurysm from the first and second scans. The same location is determined with reference to the registered first and second images of the stent. A comparison of the size value from the first and second scans is used to assess a change in size of the aneurysm between the first and second scans. This change in size allows the clinician to evaluate disease progressio…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.