Magnetic resonance imaging methods including diffusion encoding scheme with RF and gradient sequence configured to cause isotropic diffusion weighting of echo signal attenuation

US10295639B2 · kind B2 · utility

Assignee

• CR Development AB · SE

Inventors

• Daniel Topgaard · Lund, SE
• Samo Lasic · Lund, SE
• Markus Nilsson · Espoo, FI

Key dates

• Filing date: Sep 28, 2017
• Grant date: May 21, 2019
• Expiry date: Sep 28, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/56341
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The present invention describes a method for magnetic resonance (MR) and/or MR imaging, comprising acquisition of signals and MR images originating from a RE and gradient sequence causing isotropic diffusion weighting of signal attenuation, wherein the isotropic diffusion weighting is achieved by one time-dependent dephasing vector q(t) having an orientation, wherein the isotropic diffusion weighting is proportional to the trace of a diffusion tensor D, and wherein the orientation of the time-dependent dephasing vector q(t) is either varied discretely in more than three directions in total, or changed continuously, or changed in a combination of discretely and continuously during the gradient pulse sequence, 0≤t≤echo time, where t represents the time. The method may be performed during a single shot (single MR excitation).