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US 6,208,140 B1Granted
MR tomography apparatus and method for operating same to allow use of different gradient field qualities in the same pulse sequence
OwnerMatthias Gebhardt, Franz Schmittinventors
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Abstract
In a method for operating a MR-tomography device, and MR-tomography device, the gradient coil system can be switched to different field qualities during a pulse sequence, so that an optimized field quality can be chosen during the individual measuring phases of a pulse sequence.
Claims20
A method for operating a magnetic resonance tomography device comprising the steps of:
- providing a gradient coil system which can be switched to produce different field qualities;
- conducting a measuring sequence comprising a plurality of measuring phases including spin preparation, slice excitation, k-space filling and readout;
- and
- switching said gradient coil system during said measurement sequence to produce a field quality in at least one of said measuring phases which is different from respective field qualities in others of said measuring phases in said measuring sequence.
1 more element
A magnetic resonance tomography device comprising:
- a gradient coil system operable to produce different field qualities;
- an MR scanning arrangement including said gradient coil system, for conducting a measuring sequence comprising a plurality of measuring phases including spin preparation, slice excitation, k-space filling and readout;
- and
- means for switching said gradient coil system during said measurement sequence to produce a field quality in at least one of said measuring phases which is different from respective field qualities in others of said measuring phases in said measuring sequence.
1 more element
Dependencies are inferred from the claim text.