Verfahren und Vorrichtung zur Computerimplementierten Verarbeitung von Mr-Sequenzen

Details

Veröffentlichungs-Nr.

EP4760329

Anmeldetag

10. Dezember 2024

Veröffentlichung

17. Juni 2026

Rechtsraum

EP

IPC

G01R33/54, G06T11/00

Abstract

The invention describes a method for computer-implemented processing of MR sequences based on a Bloch-simulation. The method comprises the steps of:a) providing a parameter set to be processed by the Bloch-simulation for an object to be simulated, where the parameter set comprises at least one of 3D parameter maps of proton density (PD), T₁, T₂, and T2′ relaxation times, field inhomogeneity maps of B₀ and B₁, and isotropic or anisotropic diffusion parametrization;b) conducting an MRI simulation by executing the Bloch-simulation using the provided parameter set in order to calculate a signal response of MR sequences, where conducting the MRI simulation consists of processing a description of Bloch-equations in the Fourier domain, where phase distribution graphs, PDGs, describing a magnetization at any point during an MR sequence are processed;c) processing the signal response to provide reconstruction information; andd) deriving target data from the reconstruction information, the target data comprising a contrast information.Calculating the signal response (S⁺) comprises integrating of the transversal (+) magnetization over space and frequence spectrum. The magnetization of a spin at a position r with a Larmor frequency of ω is determined for all simulated voxels v by directly using the density of a tissue as a distribution V(r) describing the magnetization density inside a voxel segment.

Anmelder

Firma

Friedrich-Alexander-Universität Erlangen-Nürnberg, in Vertretung des Freistaates Bayern

Land

🇩🇪 Deutschland

Fachgebiete