Method and apparatus for acquisition of magnetic resonance data

1. A method for acquiring magnetic resonance data, comprising:

operating a magnetic resonance data acquisition unit to acquire magnetic resonance data from an examination subject in the magnetic resonance data acquisition unit, that include magnetic resonance data from a selected region of the examination subject;

via a processor supplied with said magnetic resonance data, entering said magnetic resonance data into an electronic memory representing k-space, and thereby producing a portion of k-space filled with magnetic resonance data acquired from said selected region of the examination subject;

via said processor, selecting a partial region of k-space within said portion of k-space filled with data acquired from said selected region of the subject, with said selected region being decentrally located in k-space so as to be asymmetrical with respect to a center of k-space;

acquiring said magnetic resonance data from said partial region in k-space more than once, thereby obtaining multiply acquired magnetic resonance data; and

making said multiply acquired magnetic resonance data available at an output of said processor in electronic form as a data file.

2. A method as claimed in claim 1 comprising selecting said partial region so as to include said center of k-space.

3. A method as claimed in claim 1 wherein k-space has a plurality of edges, and selecting said partial region so as to be adjacent at least one of said edges.

4. A method as claimed in claim 1 comprising selecting said partial region by shifting said partial region out of a central position in said portion of k-space filled with data acquired from the selected region of the subject, in a direction in which said partial region is smaller than an entirety of said portion, and in a direction toward an edge of said portion of k-space.

5. A method as claimed in claim 1 comprising selecting said partial region to be at least 40% of said portion of k-space filled with magnetic resonance data acquired from said selected region of the subject.

6. A method as claimed in claim 1 comprising supplementing any unmeasured magnetic resonance data from said portion of k-space using a magnetic resonance data supplementation technique.

7. A method as claimed in claim 6 comprising measuring a first percentage of said portion of k-space in a first measurement and supplementing a remaining percentage of said portion of k-space using said magnetic resonance supplementation technique.

8. A method as claimed in claim 6 comprising measuring said partial region in a second measurement and supplementing magnetic resonance data from k-space not encompassed by said partial region using said magnetic resonance supplementation technique.

9. A method as claimed in claim 6 comprising, in a first measurement, measuring a first percentage of more than 50% of said portion of k-space and supplementing a remaining percentage of said portion of k-space using said magnetic resonance supplementation technique and, in a second measurement, measuring said partial region and supplementing magnetic resonance data from k-space not encompassed by said partial region using said magnetic resonance supplementation technique, with said partial region being less than or equal to said first percentage of said portion of k-space.

10. A method as claimed in claim 1 comprising operating said magnetic resonance data acquisition unit to acquire said magnetic resonance data by executing a three-dimensional turbo spin echo sequence.

11. A method as claimed in claim 1 comprising operating said magnetic resonance data acquisition unit to acquire said magnetic resonance data by executing a SPACE sequence.

12. A magnetic resonance apparatus comprising:

a magnetic resonance data acquisition unit;

a control unit configured to operate a magnetic resonance data acquisition unit to acquire magnetic resonance data from an examination subject in the magnetic resonance data acquisition unit, that include magnetic resonance data from a selected region of the examination subject;

a processor supplied with said magnetic resonance data, said processor being configured to enter said magnetic resonance data into an electronic memory representing k-space, to thereby produce a portion of k-space filled with magnetic resonance data acquired from said selected region of the examination subject;

said processor being configured to receive a manual input that selects, or to automatically select a partial region of k-space within said portion of k-space filled with data acquired from said selected region of the subject, with said selected region being decentrally located in k-space so as to be asymmetrical with respect to a center of k-space;

said processor being configured to acquire said magnetic resonance data from said partial region in k-space more than once, thereby obtaining multiply acquired magnetic resonance data; and

said processor being configured to make said multiply acquired magnetic resonance data available at an output of said processor in electronic form as a data file.

13. A non-transitory, computer-readable data storage medium encoded with programming instructions, said data storage medium being loaded into a computerized control and evaluation system of a magnetic resonance apparatus that also comprises a magnetic resonance data acquisition unit, said programming instructions causing said control and evaluation system to:

operate the magnetic resonance data acquisition unit to acquire magnetic resonance data from an examination subject in the magnetic resonance data acquisition unit, that include magnetic resonance data from a selected region of the examination subject;

enter said magnetic resonance data into an electronic memory representing k-space, to thereby produce a portion of k-space filled with magnetic resonance data acquired from said selected region of the examination subject;

automatically implement, or allow a manual selection of, a partial region of k-space within said portion of k-space filled with data acquired from said selected region of the subject, with said selected region being decentrally located in k-space so as to be asymmetrical with respect to a center of k-space;

acquire said magnetic resonance data from said partial region in k-space more than once, thereby obtaining multiply acquired magnetic resonance data; and

make said multiply acquired magnetic resonance data available at an output of said controlled evaluation system in electronic form as a data file.