Post-processing method for an acquisition sequence to correct inhomogeneities in the magnetic fields of a magnetic resonance imaging device

Abstract

The invention relates to a method (100) for post-processing a biomarker (MBMK) produced from a set of M volumes Z(Δωj), each of said M volumes Z(Δωj) comprising N voxels describing respectively the magnitude of an experimental signal sampled at a frequency shift Δωj relative to the water resonance frequency during an acquisition sequence by a magnetic resonance imaging device (1). The method is arranged to be implemented by a processing unit of an image analysis system. Such a method (100) consists of a correction step (130, 140) by decorrelation of said biomarker (MBMK) with respect to a magnetic field (B0, B1) of the imaging device (1). The method (100) is relevant to any magnetic resonance imaging application for which correction of inhomogeneities in said magnetic fields is required. Figure to be published with the abbreviation: Fig. 16

Claims

(4), means for communicating with the outside world and means of memorization, characterized in that: - the means for communicating are arranged to receive from said outside world experimental data resulting from an acquisition sequence by a magnetic resonance imaging device (1); - the storage means comprise program instructions whose interpretation by said processing unit causes the implementation of a method (100) according to any one of the preceding claims.

6. Computer program product comprising one or more instructions interpretable by the processing unit (4) of an imaging analysis system (AS) according to the preceding claim, said computer program being loadable into storage means of said system, characterized in that the interpretation of said program instructions by said processing unit causes the implementation of a method (100) according to any one of claims 1 to 4.

7. A computer-readable storage medium comprising the program instructions of a computer program product according to the preceding claim. 8 [Fig. 3] Z(Aw) Z(Aw) [Fig. 5] Z(Aw) Z{Aw) [Fig. 10] { J...........................J J...........................$ J; ! -0.3 -0.2 -0.1 0.0 0,1 0.2 03 0.4 BO [Fig. 14] MBMK' MBW MrB1 MBMK MBMK’ MrB1

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