Black-blood steady-state free precession magnetic resonance imaging
AssigneeKoninklijke Philips Electronics N.V.
InventorsDaniel A. Herzka, John A. Derbyshire
Life of this patent
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Abstract
In an imaging method, periodic maintenance radio frequency pulses (α, −α) are applied to maintain a steady state magnetic resonance excitation in an imaging region. Readout (66) of imaging data from the imaging region is performed during selected intervals between maintenance radio frequency pulses. A spatially selective blood signal suppression sequence (62, 62′) is performed during selected other intervals between maintenance radio frequency pulses. The blood signal suppression sequence suppresses a blood signal in a suppression region different from the imaging region. The blood signal suppression sequence has substantially no zero the moment applied magnetic field gradient.
Claims23
An imaging method comprising:
- applying periodic maintenance radio frequency pulses to maintain a steady state magnetic resonance excitation in an imaging region;
- performing readout of imaging data from the imaging region during selected intervals between maintenance radio frequency pulses;
- and
- performing a spatially selective blood signal suppression sequence during selected other intervals between maintenance radio frequency pulses, the blood signal suppression sequence suppressing a blood signal in a suppression region different from the imaging region, the blood signal suppression sequence having substantially no zeroeth moment applied magnetic field gradient.
An imaging method comprising:
- performing a steady state magnetic resonance imaging sequence configured to image an imaging region;
- and
- during the performing, replacing selected readout portions of the steady state magnetic resonance imaging sequence with a spatially selective moving tissue signal alteration sequence configured to alter a signal of the moving tissue in a moving tissue alteration region from which the moving tissue moves into the imaging region, the moving tissue signal alteration sequence having substantially no zeroeth moment applied magnetic field gradient.
An imaging method comprising:
- applying periodic maintenance radio frequency pulses to maintain a steady state magnetic resonance excitation in an imaging region;
- in an interval between two successive maintenance radio frequency pulses, performing readout of imaging data from the imaging region without performing a spatially selective blood signal suppression sequence;
- and
- in an interval between two successive maintenance radio frequency pulses, performing a spatially selective blood signal suppression sequence without performing readout of imaging data, the spatially selective blood signal suppression sequence suppressing a blood signal in a suppression region different from the imaging region, the blood signal suppression sequence having substantially no zeroeth moment applied magnetic field gradient.
Dependencies are inferred from the claim text.