MR imaging with suppresion of flow artifacts

US9746539B2 · kind B2 · utility

Assignee

• KONINIKLIJKE PHILIPS N.V. · NL

Inventors

• Holger Eggers · Eindhoven, NL
• Peter Bornert · Hamburg, DE

Key dates

• Filing date: Nov 26, 2012
• Grant date: Aug 29, 2017
• Expiry date: Jul 8, 2034

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/5616
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

At least two gradient echo signals are generated at two different echo times by subjecting a portion of a body (10) in an MR examination region (1) to an imaging sequence of RF pulses and switched magnetic field gradients. The 0th moment of the readout magnetic field gradient essentially vanishes at the time of a first gradient echo while the 1st moment of the readout gradient is non-zero. Both the 0th and 1st moments of the readout magnetic field gradient essentially vanish at a time of a second gradient echo. Gradient echo signals are acquired. Acquiring the gradient echo signals is repeated for a plurality of phase encoding steps. A first MR image is reconstructed from the gradient echo signals of the first gradient echo and a second MR image is reconstructed from the gradient echo signals of the second gradient echo. Ghosting artefacts in the first and/or second MR image are identified by comparing the first and second MR images.