Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Reexamination Certificate
2007-10-12
2009-06-30
Arana, Louis M (Department: 2831)
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
C324S319000
Reexamination Certificate
active
07554327
ABSTRACT:
In a method for determination and evaluation of a shim parameter set for controlling a shim device in a magnetic resonance (MR) apparatus, the shim device is set using a first shim parameter set, a first field distribution is measured in a body region encompassing a target volume from which MR data are to be acquired, a second shim parameter set is determined using an algorithm for optimization of the field homogeneity in the target volume on the basis of the first shim parameter set and dependent on the first field distribution, a second field distribution is determined on the basis of the second shim parameter set, and the shim parameter sets are evaluated by indirect or direct comparison of the first field distribution and the second field distribution, in particular in the target volume.
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Dewdney Andrew
Harter Sabrina
Arana Louis M
Schiff & Hardin LLP
Siemens Aktiengesellschaft
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