The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 28, 2016
Filed:
Mar. 08, 2012
Walter Witschey, Philadelphia, PA (US);
Maxim Zaitsev, Freiburg, DE;
Jürgen Hennig, Freiburg, DE;
Gerrit Schultz, Freiburg, DE;
Daniel Gallichan, Freiburg, DE;
Walter Witschey, Philadelphia, PA (US);
Maxim Zaitsev, Freiburg, DE;
Jürgen Hennig, Freiburg, DE;
Gerrit Schultz, Freiburg, DE;
Daniel Gallichan, Freiburg, DE;
UNIVERSITAETSKLINIKUM FREIBURG, Freiburg, DE;
Abstract
A method to compensate for the magnetic field heterogeneity inside an object of investigation in a MR device obtains an uncorrected magnetic field distribution of the object and executes an MR sequence with a desired k-space coverage by applying RF pulses to generate a transverse magnetization within the object. MR signal data is recorded, magnetic field shimming parameters are dynamically updated and MR signal data are reconstructed to produce images or localized spectroscopic data. Artifacts in a reconstructed image resulting from an uncorrected magnetic field distribution are suppressed by temporally separating MR signals originating from at least two different sub-volumes within a volume of transverse magnetization by generating a nonlinear phase distribution within the object and by dynamically updating shimming parameters to compensate for the field inhomogeneity distributions within the different sub-volumes in the volume of transverse magnetization.