Chemical shift markers for improved wireless fiducial marker tracking
US9031634B2 · kind B2 · utility
Inventors
Key dates
| Filing date | May 15, 2003 |
| Grant date | May 12, 2015 |
| Priority date | — |
| Expiry date | Aug 3, 2032 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2090/3954
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A new and improved method for tracking and/or spatial localization of an invasive device in Magnetic Resonance Imaging (MRI) is provided. The invention includes providing an invasive device including a marker having a chemically shifted signal source with a resonant frequency different from the chemical species of the subject to be imaged, applying a pulse sequence, detecting the resulting RF magnetic resonance signals, and determining the 3D coordinates of the marker. The invention also includes generating scan planes and reconstructing an image from the detected signals to generate an image having the marker contrasted from the subject. The invasive device includes a marker having a chemically shifted signal source which has a resonant frequency different from the chemical species of the subject to be imaged for use in tracking the device during imaging.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.