Method and apparatus for recording a magnetic resonance data set with magnetic resonance signals from at least two slices
AssigneeSiemens Healthcare GmbH
InventorMario Zeller
Life of this patent
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Abstract
In a method and apparatus for recording a magnetic resonance (MR) data set with MR signals from at least two slices, a first radio-frequency (RF) pulse is radiated in at least one first slice, a second RF pulse is radiated in at least one second slice, and readout of at least one first and at least one second MR signal takes place. The flip angle of the second RF pulse is smaller than the flip angle of the first RF pulse.
Claims14
A method for operating a magnetic resonance (MR) apparatus comprising an MR data acquisition scanner comprising a computer and MR data acquisition scanner having a radio-frequency (RF) radiator, said method comprising:
- with said computer, operating the MR data acquisition scanner in order to execute an MR data acquisition sequence in order to acquire MR data from a subject;
- in said MR data acquisition sequence, operating the RF radiator of the MR scanner in order to radiate a first RF pulse that acts on nuclear spins in at least one first slice of the subject;
- also in said MR data acquisition sequence, operating said RF radiator in order to radiate a second RF pulse that acts on nuclear spins in at least one second slice of the subject;
- operating said RF radiator so as to radiate said first RF pulse and said second RF pulse as respective components of a multiband RF pulse;
- operating said RF radiator in said MR data acquisition sequence to radiate said second RF pulse with a flip angle that is smaller than a flip angle of said first RF pulse;
- in said MR data acquisition sequence, operating said MR scanner so as to read out said MR data, comprising reading out at least one first MR signal from said at least one first slice and reading out at least one second MR signal from said at least one second slice;
- and
- in said computer, reconstructing image data from said MR data and making the image data available in electronic form from said computer as a data file.
A magnetic resonance (MR) apparatus comprising:
- an MR data acquisition scanner comprising a radio-frequency (RF) radiator;
- a computer configured to operate the MR data acquisition scanner in order to execute an MR data acquisition sequence in order to acquire MR data from a subject;
- said computer being configured to operate the RF radiator of the MR scanner in said MR data acquisition sequence, in order to radiate a first RF pulse that acts on nuclear spins in at least one first slice of the subject;
- said computer being configured to operate said RF radiator also in said MR data acquisition sequence, in order to radiate a second RF pulse that acts on nuclear spins in at least one second slice of the subject;
- said computer being configured to operate said RF radiator so as to radiate said first RF pulse and said second RF pulse as respective components of a multiband RF pulse;
- said computer being configured to operate said RF radiator in said MR data acquisition sequence to radiate said second RF pulse with a flip angle that is smaller than a flip angle of said first RF pulse;
- said computer being configured to operate said MR scanner in said MR data acquisition sequence, so as to read out said MR data, by reading out at least one first MR signal from said at least one first slice and reading out at least one second MR signal from said at least one second slice;
- and
- said computer being configured to reconstruct image data from said MR data and to make the image data available in electronic form from said computer as a data file.
A non-transitory, computer-readable data storage medium encoded with programming instructions, said storage medium being loadable into a computer of a magnetic resonance (MR) apparatus that comprises an MR data acquisition scanner having a radio-frequency (RF) radiator, said programming instructions causing said computer to:
- operate the MR data acquisition scanner in order to execute an MR data acquisition sequence in order to acquire MR data from a subject;
- in said MR data acquisition sequence, operate the RF radiator of the MR scanner in order to radiate a first RF pulse that acts on nuclear spins in at least one first slice of the subject;
- also in said MR data acquisition sequence, operate said RF radiator in order to radiate a second RF pulse that acts on nuclear spins in at least one second slice of the subject;
- operating said RF radiator so as to radiate said first RF pulse and said second RF pulse as respective components of a multiband RF pulse;
- operate said RF radiator in said MR data acquisition sequence to radiate said second RF pulse with a flip angle that is smaller than a flip angle of said first RF pulse;
- in said MR data acquisition sequence, operate said MR scanner so as to read out said MR data, by reading out at least one first MR signal from said at least one first slice and reading out at least one second MR signal from said at least one second slice;
- and
- reconstruct image data from said MR data and make the image data available in electronic form from said computer as a data file.
Dependencies are inferred from the claim text.