Verfahren und Vorrichtung zur Durchführung Beschleunigter Magnetresonanzbildgebung mit Reduziertem Off-Resonanzeffekt

Details

Veröffentlichungs-Nr.

EP4266073

Aktenzeichen

EP23169293

Anmeldetag

21. April 2023

Veröffentlichung

30. Juli 2025

Erteilung

30. Juli 2025

Rechtsraum

EP

IPC

G01R33/48G01R33/565

Abstract

A method of performing magnetic resonance imaging of a body using a magnetic resonance imaging scanner the method comprising applying to said body a time-varying magnetic field gradient (G_x, G_y, G_z) defining a continuous trajectory (ST) in k-space complying with a set of constraints including constraints on maximum amplitude and maximum slew rate of said time-varying magnetic field gradient, such that sampling points (KS) belonging to the trajectory define a pseudo-random sampling of the k-space, approximating a predetermined target sampling density, said trajectory in k-space minimizing, subject to said set of constraints, a cost function defined by the difference between a first term, called attraction term, promoting consistency of the distribution of sampling points in k-space with said predetermined target sampling density, and a second term, called repulsion term, promoting separation in k-space between sampling points, said repulsion term being expressed as a sum of contributions corresponding to respective pairs of sampling points;characterized in that each said contribution is weighted by a weight which increase with temporal separation of the sampling points along said trajectory in k-space.

Anmelder

Firmen

Commissariat à l'Energie Atomique et aux Energies Alternatives
Siemens Healthcare SAS
Commissariat à l'énergie atomique et aux énergies alternatives

Land

🇫🇷 Frankreich

Fachgebiete