Siemens Aktiengesellschaft

Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Max-Planck-Gesellschaft Zur F&#xf6;rderung Der Wissenschaften E. V.

Siemens Corporation

Robin Heidemann

David Andrew Porter

David Grodzki

Josef Pfeuffer

Gunnar Krüger

Martin Ott

Fabrizio Fasano

Mark Griswold

In a method and apparatus for magnetic resonance imaging, a particularly quiet magnetic resonance sequence, uses echo-planar imaging with at least one gradient switching in a readout direction, wherein the at least one gradient switching in the readout direction has a slew rate that is less than a maximum slew rate defined by system specification parameters of the magnetic resonance apparatus.

Method and apparatus for EPI magnetic resonance with slew rate controlled and kspace entry optimized

In a method and apparatus for echo planar magnetic resonance (MR) imaging sequence of phase encoding gradient fields and a sequence of readout gradient fields are applied in order to produce a well-defined zigzag-type trajectory for entering raw data into k-space. Zigzag-type trajectories can be achieved that have flanks without curvature, or without significant curvature. Cartesian methods for image reconstruction of parallel MR imaging are applied to echo planar MR imaging with such zigzag-type trajectories.

Method and magnetic resonance apparatus for echo planar imaging with data entry into k-space along a zigzag trajectory

In a magnetic resonance imaging method and apparatus, magnetic resonance data are acquired (an examination subject) using a zoomed method, and reconstruction of the image of the examination subject is undertaken using a parallel imaging reconstruction method.

Magnetic resonance imaging method using a parallel imaging technique combined with a zoomed acquisition technique

In a method for magnetic resonance imaging using a partial parallel acquisition technique with a non-Cartesian occupation of k-space, a number of antennas disposed around an imaging volume for reception of magnetic resonance signals and the magnetic resonance signals in the imaging volume are spatially coded by magnetic gradient fields, such that k-space for each antenna is only incompletely occupied with magnetic resonance signals with at least one trajectory proceeding around the origin of k-space. From the reception signals of each antenna, missing sample values of the trajectory that lie on a straight-line segment extending from the origin are determined in k-space according to a weighting with weighting factors from sample values of the trajectory that likewise lie on the straight lines, such that each k-space is completely occupied. A partial image of the imaging area is generated from each completely occupied k-space by means of a Fourier transformation. An image of the imaging volume is generated from the partial images.

Magnetic resonance imaging method using a partial parallel acquisition technique with non-Cartesian occupation of k-space

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Strullendorf, Germany

Robin Heidemann