Bruker Biospin Ag

Markus Weiger

Michael Fey

Thomas Speck

A method for homogenizing a static magnetic field with a magnetic field distribution B(r) for nuclear magnetic resonance spectroscopy by adjusting the currents Cthrough the shim coils, thus creating spatial field distributions C&#xb7;S(r), where r stands for one, two, or three of the spatial dimensions x, y, and z, and said magnetic field distribution B(r) has only a field component along z, in a working volume of a magnetic resonance apparatus with one or more radio frequency (=RF) coils () for inducing RF pulses and receiving RF signals within a working volume, said RF coils having a spatial sensitivity distribution of magnitudes B(r), and with shim coils () for homogenizing the magnetic field within the working volume, said shim coils () being characterized by their magnetic field distributions per unit current S(r) and having components only along z, includes the following steps: In this way a direct one-to-one link is obtained between a set of shim currents and the associated NMR spectrum The quality of the desired NMR spectra can be improved with this method.

Method for automatic shimming for nuclear magnetic resonance spectroscopy

A method for homogenizing a static magnetic field with a magnetic field distribution B(r) for nuclear magnetic resonance spectroscopy by adjusting the currents Cthrough the shim coils, thus creating spatial field distributions C&#xb7;S(r), where r stands for one, two, or three of the spatial dimensions x, y, and z, and said magnetic field distribution B(r) has only a field component along z, in a working volume of a magnetic resonance apparatus with one or more radio frequency (=RF) coils () for inducing RF pulses and receiving RF signals within a working volume, said RF coils having a spatial sensitivity distribution of magnitudes B(r), and with shim coils () for homogenizing the magnetic field within the working volume, said shim coils () being characterized by their magnetic field distributions per unit current S(r) and having components only along z, includes the following steps:

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Wettswil, Switzerland

Markus Weiger