Systems and methods for detecting magnetic markers for surgical guidance
US12226266B2 · kind B2 · utility
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26References
15Claims
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Key dates
| Filing date | Apr 24, 2023 |
| Grant date | Feb 18, 2025 |
| Priority date | — |
| Expiry date | Apr 24, 2043 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2562/0223
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A detection system and method uses an implantable magnetic marker comprising at least one piece of a large Barkhausen jump material (LBJ). The marker is deployed to mark a tissue site in the body for subsequent surgery, and the magnetic detection system includes a handheld probe to excite the marker below the switching field for bistable switching of the marker causing a harmonic response to be generated in a sub-bistable mode that allows the marker to be detected and localised. The marker implanted may also be shorter than the critical length required to initiate bistable switching of the LBJ material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.