Siemens Healthcare Gmbh

Siemens Healthineers Ag

Michael Mallett

Andreas Krug

Stephan Biber

Stefan Popescu

Andreas Greiser

Matthias Gebhardt

Adrian Mark Thomas

Thomas Beck

Thorsten Speckner

Peter Dietz

Lars Lauer

Marco Bevilacqua

A gradient system for a magnetic resonance device, configured to, when arranged in use in the magnetic resonance device, generate a variable magnetic gradient field in a scanning region of the magnetic resonance device. The gradient system includes a first magnetic assembly configured to generate a first magnetic gradient field contribution to the magnetic gradient field. The first magnetic assembly includes one or more components configured to, in use, act as respective non-electric magnets to generate the first magnetic gradient field contribution. A positioning unit is configured to adjust a position and/or orientation, relative to the magnetic resonance device, of the first magnetic assembly and/or of one or more of the components of the first magnetic assembly to adjust the first magnetic gradient field contribution and thereby to vary the magnetic gradient field.

Magnetic resonance gradient system

A magnetic resonance imaging device may include a field generator configured to provide a magnetic field in an imaging volume of the magnetic resonance imaging device. The field generator may include at least one magnet that confines the imaging volume in at least one spatial direction. The at least one magnet may be curved in such a way that a perpendicular distance between a line oriented along a direction of access to the imaging volume and a surface directed towards the imaging volume of the at least one magnet varies in the direction of access to the imaging volume.

Magnetic resonance imaging device with a curved field generation unit

A magnetic resonance imaging device may include a field generator for generating at least one magnetic gradient field. The field generator may include a first magnet and a second magnet confining an imaging volume of the magnetic resonance imaging device in two spatial directions. The first magnet and the second magnet may be arranged asymmetrically with respect to the imaging volume. The magnetic resonance imaging device may be used to perform a method for acquiring an image of a diagnostically relevant body region of a patient.

Magnetic resonance imaging device with asymmetric field generation unit

A magnetic resonance imaging device having a field generation unit configured to provide a magnetic field in an imaging volume of the magnetic resonance imaging device. The field generation unit has at least one magnet. A surface of the field generation unit directed towards the imaging volume of the at least one magnet has a concave shape, wherein a direction of access to the imaging volume is oriented essentially perpendicular to a main direction of magnetic field lines in the imaging volume.

Magnetic resonance imaging device with a concave-shaped field generation unit

A device for use in magnetic resonance imaging (MRI) systems may include a superconducting main magnet coil; and a thermal radiation shield that encloses the superconducting main magnet coil. The shield may include an inner cylindrical bore tube, an outer cylindrical wall, and annular end walls welded between the annular cylindrical bore tube and the outer cylindrical wall to form a closed, hollow cylindrical vessel. A distribution of a position and length of welds that affix the annular end walls to the inner cylindrical bore tube may include a predetermined arrangement of welds of varying lengths interspersed with gaps of varying lengths.

Apparatus for magnetic resonance imaging, and methods for the design and manufacture thereof

A magnetic resonance imaging system comprises a field generation unit and a supporting structure for providing structural support for the field generation unit, wherein the field generation unit comprises at least one magnet for generating a B0 magnetic field and an opening configured to provide access to an imaging volume positioned in the B0 magnetic field along at least one direction and wherein the at least one direction is angled with respect to a main direction of magnetic field lines of the B0 magnetic field in the imaging volume.

Magnetic resonance scanner and magnetic resonance imaging system

A Magnetic Resonance Imaging (MRI) system, including: two separate static magnetic field generators, which are each cylindrical, are axially aligned, and are separated by a rotary load-bearing structure arranged to freely rotate about an axis of a static magnetic field generated by the static magnetic field generators, wherein the rotary load-bearing structure is mounted on thrust bearings which take an axial load between the static magnetic field generators.

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Oxford, United Kingdom

Michael Mallett