Self-shielded gradients and method of designing and producing self-shielded gradients
US7382133B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 28, 2006 |
| Grant date | Jun 3, 2008 |
| Priority date | — |
| Expiry date | Jul 21, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/3806
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A self-shielded gradient adapted to be disposed within a main magnet field of an MRI scanner includes a gradient coil having a shield current distribution Js based on current density components φn on a gradient surface whereThe current distribution is a predetermined value within a volume defined by a periphery of the gradient coil. The current distribution is substantially zero outside the periphery of the gradient coil. According to a method of producing a self-shielded gradient, a shield current distribution Js is determined based on current density components φn on a gradient surface whereby using an optimization technique, and a gradient coil is constructed according to the shield current distribution. The current distribution is a predetermined value within a volume defined by a periphery of the gradient coil. The current distribution is substantially zero outside the periphery of the gradient coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.