Method for homogenizing resolution in magnet resonance tomography measurements using non-linear encoding fields

US8823372B2 · kind B2 · utility

Assignee

• UNIVERSITAETSKLINIKUM FREIBURG · DE

Inventors

• Hans Weber · Glückstadt, DE
• Maxim Zaitsev · Glückstadt, DE
• Daniel Gallichan · Glückstadt, DE
• Gerrit Schultz · Glückstadt, DE

Key dates

• Filing date: Mar 16, 2011
• Grant date: Sep 2, 2014
• Expiry date: Aug 17, 2032

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/4833
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for magnetic resonance (=MR) imaging, wherein non-linear gradient fields are applied for the purpose of spatial encoding to acquire images of an object to be imaged and wherein the magnet resonance signal radiated from the object to be imaged is sampled on grids in time, to thereby obtain sampling points, is characterized in that the object to be imaged is mapped completely in regions of stronger gradient fields by increasing the density of the sampling points in the center of k-space, and additional sampling points are specifically acquired in the outer regions of k-space according to a k-space sampling pattern depending on the desired distribution of the resolution in the measurement, wherein the MR measurement is calculated with the additional sampling points. An MR imaging method is thereby provided by means of which homogenized resolution is achieved in the MR measurements using non-linear gradient fields for spatial encoding.