Method and magnetic resonance apparatus for acquiring magnetic resonance dataset with reduced susceptibility artifacts in the reconstruction image
AssigneeSiemens Healthcare GmbH
InventorsThorsten Feiweier, Josef Pfeuffer, Daniel Nico Splitthoff
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Abstract
In a method and apparatus for recording a magnetic resonance dataset of a volume of interest of an object, at least one gradient moment is calculated as a function of at least one jump in susceptibility that is present in the volume of interest, between two sections of the volume of interest. An excitation pulse is radiated and at least one compensation moment is activated in a part volume of the volume of interest, for the at least partial compensation of a gradient moment caused by the jump in susceptibility. The signal generated by the excitation pulse is read out.
Claims17
A method for acquiring a magnetic resonance (MR) dataset of volume of interest of a subject, said method comprising:
- providing a processor with an electronic input that designates at least one jump in susceptibility that exists in said volume of interest between two sections of said volume of interest;
- in said processor, calculating at least one gradient moment dependent on said at least one jump in susceptibility;
- from said processor, operating an MR data acquisition scanner to execute an MR data acquisition sequence that includes radiation of an excitation pulse that excites nuclear spins in said volume of interest;
- during execution of said sequence, operating said MR data acquisition scanner to activate at least one compensation moment that is effective in a portion of said volume of interest to at least partially compensate said gradient moment caused by said jump in susceptibility;
- from said processor, operating said MR data acquisition scanner in said sequence to read out signals produced by said nuclear spins resulting from said excitation pulse;
- and
- from said processor, making the read out signal available from the processor in electronic form, as a data file.
A non-transitory, computer-readable data storage medium encoded with programming instructions, said storage medium being loaded into a computer system of a magnetic resonance (MR) apparatus, that comprises an MR data acquisition scanner, said programming instructions causing said computer system to:
- receive an electronic input that designates at least one jump in susceptibility that exists in a volume of interest between two sections of said volume of interest;
- calculate at least one gradient moment dependent on said at least one jump in susceptibility;
- operate said MR data acquisition scanner to execute an MR data acquisition sequence that includes radiation of an excitation pulse that excites nuclear spins in said volume of interest;
- during execution of said sequence, operate said MR data acquisition scanner to activate at least one compensation moment that is effective in a portion of said volume of interest to at least partially compensate said gradient moment caused by said jump in susceptibility;
- operate said MR data acquisition scanner in said sequence to read out signals produced by said nuclear spins resulting from said excitation pulse;
- and
- make the read out signal available from the computer system in electronic form, as a data file.
A magnetic resonance (MR) apparatus comprising:
- an MR data acquisition scanner adapted to receive a subject therein, said subject comprising a volume of interest from which MR signals are to be acquired;
- a processor provided with an electronic input that designates at least one jump in susceptibility that exists in said volume of interest between two sections of said volume of interest;
- said processor being configured to calculate at least one gradient moment dependent on said at least one jump in susceptibility;
- said processor being configured to operate said MR data acquisition scanner to execute an MR data acquisition sequence that includes radiation of an excitation pulse that excites nuclear spins in said volume of interest;
- said processor being configured to, during execution of said sequence, operate said MR data acquisition scanner to activate at least one compensation moment that is effective in a portion of said volume of interest to at least partially compensate said gradient moment caused by said jump in susceptibility;
- said processor being configured to operate said MR data acquisition scanner in said sequence to read out signals produced by said nuclear spins resulting from said excitation pulse;
- and
- said processor being configured to make the read out signal available from the processor in electronic form, as a data file.
Dependencies are inferred from the claim text.