Method for performing a magnetic resonance measurement of a patient, magnetic resonance apparatus, and computer program product

A magnetic resonance apparatus that is configured to perform a magnetic resonance measurement of a patient, the magnetic resonance apparatus comprising:

• a gradient coil unit operable to produce magnetic field gradients;
• a radiofrequency antenna unit configured to produce an excitation pulse;
• and
• a processor configured to:
• provide a first B0 field map for a first motion state of the patient, and at least one further B0 field map for at least one further motion state of the patient;
• determine a first excitation pulse for the first motion state and at least one further excitation pulse for the at least one further motion state based on the first B0 field map and the at least one further B0 field map;
• and
• perform the magnetic resonance measurement, during which a motion state of the patient is monitored,
• wherein the radiofrequency antenna unit is configured to transmit the first excitation pulse when the patient is in the first motion state,
• wherein the radiofrequency antenna unit is configured to transmit the at least one further excitation pulse when the patient is in the at least one further motion state,
• wherein the processor is further configured to determine a first gradient pulse for the first motion state and at least one further gradient pulse for the at least one further motion state based on the first B0 field map and a second B0 field map, the at least one further gradient pulse being different than the first gradient pulse,
• wherein the gradient coil unit is configured to:
• apply the first gradient pulse when the patient is in the first motion state;
• and
• apply the at least one further gradient pulse when the patient is in the at least one further motion state, and
• wherein each of the first excitation pulse and the at least one further excitation pulse is a spectrally selective excitation pulse that is configured to achieve saturation of nuclear spins of a first bond type as the excitation to be achieved, such that flip angles of the first bond type and a second bond type are altered by different amounts.

In a non-transitory computer-readable storage medium that stores instructions executable by one or more processors to perform a magnetic resonance measurement of a patient using a magnetic resonance apparatus, the magnetic resonance apparatus including a radiofrequency antenna unit for producing an excitation pulse, the instructions comprising:

• providing a first B0 field map for a first motion state of the patient, and at least one further B0 field map for at least one further motion state of the patient;
• determining a first excitation pulse for the first motion state and at least one further excitation pulse for the at least one further motion state based on the first B0 field map and the at least one further B0 field map;
• and
• performing the magnetic resonance measurement, during which a motion state of the patient is monitored,
• wherein the radiofrequency antenna unit transmits the first excitation pulse when the patient is in the first motion state,
• wherein the radiofrequency antenna unit transmits the at least one further excitation pulse when the patient is in the at least one further motion state,
• wherein the magnetic resonance apparatus further includes a gradient coil unit operable to produce magnetic field gradients,
• wherein a first gradient pulse for the first motion state and at least one further gradient pulse for the at least one further motion state are determined based on the first B0 field map and a second B0 field map, the at least one further gradient pulse being different than the first gradient pulse,
• wherein the gradient coil unit applies the first gradient pulse when the patient is in the first motion state,
• wherein the gradient coil unit applies the at least one further gradient pulse when the patient is in the at least one further motion state, and
• wherein each of the first excitation pulse and the at least one further excitation pulse is a spectrally selective excitation pulse that is configured to achieve saturation of nuclear spins of a first bond type as the excitation to be achieved, such that flip angles of the first bond type and a second bond type are altered by different amounts.