Calibration of ultrasonic elasticity-based lesion-border mapping
US11109840B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2016 |
| Grant date | Sep 7, 2021 |
| Priority date | — |
| Expiry date | Jul 13, 2037 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N2007/0052
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A medium of interest is interrogated according to ultrasound elastography imaging. A preliminary elasticity-spatial-map is formed. This map is calibrated against a reference elasticity-spatial-map that comprises an array (232) of different (240) elasticity values. The reference map is formed to be reflective of ultrasonic shear wave imaging of a reference medium. The reference medium is not, nor located at, the medium of interest, and may be homogeneous. Shear waves that are propagating in a medium are tracked by interrogating the medium. From tracking locations on opposite sides of an ablated-tissue border, propagation delay of a shear wave in the medium and of another shear wave are measured. The two shear waves result from respectively different pushes (128) that are separately issued. A processor decides, based on a function of the two delays, that the border crosses between the two locations. The calibrated map is dynamically updated and may include post-ablation border expansion (346) and time-annotated previous stages (344, 348).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.