Verfahren zur Rekonstruktion eines Bewegungskorrigierten Magnetresonanzbildes eines Patienten

Details

Veröffentlichungs-Nr.

EP4733795

Anmeldetag

25. Oktober 2024

Veröffentlichung

29. April 2026

Rechtsraum

EP

IPC

G01R33/565, G01R33/561

Abstract

The invention relates to a method for reconstructing a motion-corrected magnetic resonance image (20) of a subject. The method comprises receiving a motion trajectory comprising a series of motion states; determining similarities across the motion states and forming groups of motion states (G1, G2, G3), such that each group contains motion states that are similar to each other, and determining a single group motion state representing each group;for each group of motion states, computing a single transformation operator and building a group-specific NuFT forward model (30), in which a mismatch between the coil sensitivity maps (24) and the magnetic resonance image (20) caused by a motion (22) of the subject during the acquisition is reduced by operating the transformation operator on the coil sensitivity maps (24) and/or on the magnetic resonance image; and reconstructing (46) the motion-corrected magnetic resonance image by minimizing the data consistency error between the received k-space data and the group-specific NuFT forward models, wherein each NuFT forward model comprises the image, the coil sensitivity maps, a non-uniform Fourier Transformation (30), and a phase factor corresponding to the motion state held by the subject at the time of acquiring the corresponding subset of k-space data.

Anmelder

Firma

Siemens Healthineers AG

Land

🇩🇪 Deutschland

Fachgebiete