Magnetic field map determination in a magnetic resonance system

US10989781B2 · kind B2 · utility

Assignee

• Siemens Healthcare Limited · DE

Inventors

• Thorsten Feiweier · Peising, DE
• Daniel Niederlöhner · Erlangen, DE

Key dates

• Filing date: Aug 21, 2018
• Grant date: Apr 27, 2021
• Expiry date: Jul 25, 2039

Classification

• Technology area (CPC G): Physics
• CPC primary: G06T2207/30004
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method and system for determining a magnetic field map in a MR system based on position of a movable patient support of the MR system are provided, wherein a first resulting field map including position dependent information about a magnetic field distribution in a homogeneity volume including an examination volume of the MR system is provided when the movable patient support is located at a first position, wherein a stationary field map including information about a magnetic field distribution in the homogeneity volume is provided, which is independent of the position of the movable patient support, wherein a position dependent field map including information about a magnetic field distribution in the homogeneity volume mainly influenced by a position of the movable patient support is determined using the stationary field map and the first resulting field map, and wherein a second resulting field map in the homogeneity volume is determined when the movable patient support is located at a second position different from the first position, using the stationary field map and the position dependent field map.