Method for reduced field of view mri in an inhomogeneous field with rapid outer volume suppression
AssigneeUniversity of Southern California
InventorsTravis B. Smith, Krishna S. Nayak
Life of this patent
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Abstract
An MRI scanner may include one or more gradient waveform generators, gradient amplifiers, gradient coils, an RF waveform generator, an RF amplifier, an RF coil, a superconducting magnet, an RF detector; a digitizer, and a computer system that controls the one or more gradient waveform generators and the RF waveform generator so as to generate a magnetization saturation preparation pulse sequence that includes a tip-down pulse that is insensitive to RF field inhomogeneity followed by a tip-back pulse that employs a conjugate symmetry constraint in its energy spectrum.
Claims10
An MRI scanner comprising:
- one or more gradient waveform generators that generate one or more gradient waveforms;
- gradient amplifiers that each amplify one of the gradient waveforms;
- gradient coils that each generate a magnetic field based on an amplified gradient waveform;
- an RF waveform generator that generates an RF waveform;
- an RF amplifier that amplifies the RF waveform;
- an RF coil that transmits the amplified RF waveform;
- a superconducting magnet that generates a detectable signal;
- an RF coil that receives the detectable signal;
- an RF detector that detects the detectable signal received by the RF coil;
- a digitizer that digitizes the detected signal;
- and
- a computer system that controls the one or more gradient waveform generators and the RF waveform generator so as to generate a magnetization saturation preparation pulse sequence that includes a tip-down pulse that is insensitive to RF field inhomogeneity followed by a tip-back pulse that employs a conjugate symmetry constraint in its energy spectrum.
A non-transitory, tangible, computer-readable storage media containing a program of instructions that cause a computer system within an MRI scanner that includes one or more gradient waveform generators that generate one or more gradient waveforms, gradient amplifiers that each amplify one of the gradient waveforms, gradient coils that each generate a magnetic field based on an amplified gradient waveform, an RF waveform generator that generates an RF waveform, an RF amplifier that amplifies the RF waveform, an RF coil that transmits the amplified RF waveform, a superconducting magnet that generates a detectable signal, an RF coil that receives the detectable signal, an RF detector that detects the detectable signal received by the RF coil, and a digitizer that digitizes the detected signal, to control the one or more gradient waveform generators and the RF waveform generator so as to generate a magnetization saturation preparation pulse sequence that includes a tip-down pulse that is insensitive to RF field inhomogeneity followed by a tip-back pulse that employs a conjugate symmetry constraint in its energy spectrum.
Dependencies are inferred from the claim text.