Passive shield for magnetic resonance imaging gradient coils
US12099104B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 20, 2023 |
| Grant date | Sep 24, 2024 |
| Priority date | — |
| Expiry date | Jan 20, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/385
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An MRI system including a main magnet defining a volume, an imaging region disposed within the volume. The main magnet is configured to produce a uniform main magnetic field within the volume, wherein the uniform magnetic field is oriented along a patient axis. The system includes a gradient magnetic coil assembly disposed within the volume and configured to generate a spatially varying magnetic field across the imaging region. The gradient magnetic coil assembly includes a first coil configured to generate a magnetic field in a first axis, a second coil configured to generate a magnetic field in a second axis, and a third coil configured to generate a magnetic field in the patient axis. The system also includes a passive gradient shield disposed between the main magnet and primary gradient magnetic coil assembly, the passive gradient shield can include a continuous cylindrical layer of high permeability, low electrical conductivity material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.