Abstract: An apparatus for magnetic resonance imaging includes one or more radio-frequency (RF) loops configured to probe a measurement space and multiple coils configured for B0 shimming in the measurement space. The multiple coils are spaced such that interference with a received RF signal in the one or more RF loops is below a target level of interference.

Abstract: An apparatus for fabricating non-planar coils includes a rotating table driven by a first motor; a wire approach height adjustment arm driven by a second motor; and a synchronization module configured such that a wire traversing from the height adjustment arm to a bobbin on the rotating table passes into a non-planar groove cut in the bobbin without damaging the wire. Performing magnetic resonance (MR) measurements includes a plurality of coil units configured for generating a gradient or shim magnetic field. The coil unit includes a plurality of coil windings, and each coil winding is separated longitudinally from an adjacent coil winding. A single pair of electrically conducting leads is configured to cause current to flow through all of the plurality of coil windings in the coil unit. Techniques include methods to fabricate and operate the apparatus.

Abstract: An apparatus for fabricating non-planar coils includes a rotating table driven by a first motor; a wire approach height adjustment arm driven by a second motor; and a synchronization module configured such that a wire traversing from the height adjustment arm to a bobbin on the rotating table passes into a non-planar groove cut in the bobbin without damaging the wire. Performing magnetic resonance (MR) measurements includes a plurality of coil units configured for generating a gradient or shim magnetic field. The coil unit includes a plurality of coil windings, and each coil winding is separated longitudinally from an adjacent coil winding. A single pair of electrically conducting leads is configured to cause current to flow through all of the plurality of coil windings in the coil unit. Techniques include methods to fabricate and operate the apparatus.

Abstract: Techniques for crushing unwanted coherence pathways during magnetic resonance spectral (MRS) measurements include receiving first data that indicates a sequence of RF pulses with one or more target coherence pathways of spin states for a subject that has at least N?1 coupled spin states of interest. A negative, non-integer amplitude is determined for at least one intervening crusher pulse emitted from at least one spatial gradient magnetic coil. The at least one intervening crusher pulse has a duration less than a time between successive pulses of the sequence of RF pulses; and, the intervening crusher pulse de-phases unwanted coherence pathways. A MRS device is operated using the intervening crusher pulse and the sequence of RF pulses.

Abstract: Techniques for crushing unwanted coherence pathways during magnetic resonance spectral (MRS) measurements include receiving first data that indicates a sequence of RF pulses with one or more target coherence pathways of spin states for a subject that has at least N?1 coupled spin states of interest. A negative, non-integer amplitude is determined for at least one intervening crusher pulse emitted from at least one spatial gradient magnetic coil. The at least one intervening crusher pulse has a duration less than a time between successive pulses of the sequence of RF pulses; and, the intervening crusher pulse de-phases unwanted coherence pathways. A MRS device is operated using the intervening crusher pulse and the sequence of RF pulses.

Abstract: A method of providing shim sheets for adjusting a magnetic field in a magnetic resonance device by passive shimming, comprises the steps of field mapping of a region of interest in the MR device for obtaining an uncorrected magnetic field distribution including field inhomogeneities, decomposing the field inhomogeneities into first and second order spherical harmonic functions, determining primary shim terms derived from the second order spherical harmonic functions, wherein the primary shim terms yield a passive shim field adapted to a targeted shim field, scaling optimized shim terms for increasing a similarity of the passive shim field with the targeted shim field, constructing modular shim sheets on the basis of the optimized shim terms, and mounting the modular shim sheets on a shim sheet carrier of the magnetic resonance device. Furthermore, an adjustment device for adjusting a magnetic field in a magnetic resonance device by passive shimming is described.

Abstract: A method of providing shim sheets for adjusting a magnetic field in a magnetic resonance device by passive shimming, comprises the steps of field mapping of a region of interest in the MR device for obtaining an uncorrected magnetic field distribution including field inhomogeneities, decomposing the field inhomogeneities into first and second order spherical harmonic functions, determining primary shim terms derived from the second order spherical harmonic functions, wherein the primary shim terms yield a passive shim field adapted to a targeted shim field, scaling optimized shim terms for increasing a similarity of the passive shim field with the targeted shim field, constructing modular shim sheets on the basis of the optimized shim terms, and mounting the modular shim sheets on a shim sheet carrier of the magnetic resonance device. Furthermore, an adjustment device for adjusting a magnetic field in a magnetic resonance device by passive shimming is described.