Correction of distorted diffusion-weighted magnetic resonance image data

US11402454B2 · kind B2 · utility

Assignee

• Siemens Healthcare Limited · DE

Inventors

• Adam Kettinger · Bayern, DE
• Josef Pfeuffer · Newton, US
• Manuel Stich · Schwandorf, DE
• Thorsten Feiweier · Peising, DE
• Mario Zeller · Erlangen, DE

Key dates

• Filing date: Jan 22, 2021
• Grant date: Aug 2, 2022
• Expiry date: Jan 22, 2041

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/5608
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The disclosure relates to techniques for reducing eddy current-induced magnetic field interferences for a diffusion imaging pulse sequence. A gradient impulse response function (GIRF) is determined, and an interference gradient sequence (Gx/y/z(t)) is defined on the basis of the diffusion imaging pulse sequence. A time interval (t1, t2) is determined for the acquisition of diffusion image data. On the basis of the determined gradient impulse response function (GIRF) and the interference gradient sequence (Gx/y/z(t)), a time-dependent magnetic field deviation (ΔBx/y/z(t)) in the determined time interval (t1, t2) is determined. An image distortion of an acquisition of diffusion imaging is compensated, which takes place by application of the diffusion imaging pulse sequence on the basis of the determined magnetic field deviation (ΔBx/y/z(t)).