Verfahren zur Gewinnung eines Korrekturfaktors, Speichermedium und Magnetresonanzvorrichtung

Details

Veröffentlichungs-Nr.

EP3702798

Aktenzeichen

EP19160056

Anmeldetag

28. Februar 2019

Veröffentlichung

31. Mai 2023

Erteilung

31. Mai 2023

Rechtsraum

EP

IPC

G01R33/48G01R33/565G01R33/561

Abstract

Storage medium, magnetic resonance apparatus and method for obtaining a correction factor (bcf) to balance a mismatch between gradient moments providing the steps:- providing a magnetic resonance raw dataset (70) the generation of which includes:∘ acquiring the k-space of the magnetic resonance raw dataset (70) in several partial measurements (71), in every partial measurement (71) several k-space lines (55, 56, 57, 58, 59, 60, 61, 62, 92, 93) are at least partially sampled having the steps:∘ setting a given set of acquisition parameters,∘ applying at least one radio frequency excitation pulse (12),∘ applying a first gradient (26) in a predetermined direction (k(x)),∘ applying a second gradient (27) in the predetermined direction (k(x)),∘ reading out the magnetic resonance signals (40),- the first gradient (26) being changed between at least two partial measurements (71),- processing the magnetic resonance raw dataset (70) several times to shifted raw datasets (72, 73, 74, 75, 76), each time using a different correction factor (cf1, cf2, cf3, cf4, cf5) to shift the magnetic resonance signals (40, 87) in k-space in the predetermined direction (k(x), k(y)), and- creating several magnetic resonance image datasets (82, 83, 84, 85, 86) out of the shifted raw datasets (72, 73, 74, 75, 76),- determining the correction factor with respect to the image datasets (82, 83, 84, 85, 86).

Anmelder

Firmen

Siemens Healthineers AG
Siemens Healthcare GmbH

Land

🇩🇪 Deutschland

Fachgebiete