Method of manufacturing an implantable marker with a leadless signal transmitter
US8857043B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2007 |
| Grant date | Oct 14, 2014 |
| Priority date | — |
| Expiry date | Feb 27, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49194
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method of manufacturing a leadless marker for localizing the position of a target within a patient. According to one embodiment, the method includes providing a ferromagnetic element; positioning a coil of an inductor at least around a portion of the ferromagnetic element, wherein the coil comprises a plurality of windings of a conductor; and positioning the ferromagnetic element such that the radiographic and magnetic centroids of the marker are at least substantially coincident. The marker does not have external electrical lead lines extending through the casing. The ferromagnetic element is at least partially within the inductor. The ferromagnetic element has a volume such that when the marker is in an imaging magnetic field having a field strength of 1.5 T and a gradient of 3 T/m, then the force exerted on the marker by the imaging magnetic field is not greater than gravitational force exerted on the marker.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.