Methods, systems, and devices for intra-scan motion correction
First Claim
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1. A magnetic resonance system configured to correct intra-scan motion during a magnetic resonance scan, the system comprising:
- a magnetic resonance scanner configured to;
apply at least a first pulse sequence comprising one or more RF pulses; and
generate a magnetic field gradient comprising a correction gradient;
a motion tracking system configured to;
detect motion of a subject; and
generate motion data corresponding to the motion of the subject;
one or more computer readable storage devices configured to store one or more modules, the one or more modules including a correction gradient calculation module; and
one or more hardware computer processors in communication with the one or more computer readable storage devices and configured to execute the one or more modules to cause the magnetic resonance scanner to;
generate the correction gradient, the correction gradient being generated based on at least a first gradient moment, wherein the first gradient moment is calculated by the correction gradient calculation module based on at least an integral of the motion data and the one or more RF pulses of the first pulse sequence, andapply the correction gradient to the subject after all of the one or more RF pulses are applied to the subject but prior to detecting signals emitted from the subject in response to the application of all of the one or more RF pulses and the correction gradient, to prospectively correct one or more errors in the first gradient moment due to movement of the subject during the magnetic resonance scan; and
detect the signals emitted from the subject in response to the application of all of the one or more RF pulses and the correction gradient for data acquisition.
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Abstract
Systems, methods, and devices for intra-scan motion correction to compensate not only from one line or acquisition step to the next, but also within each acquisition step or line in k-space. The systems, methods, and devices for intra-scan motion correction can comprise updating geometry parameters, phase, read, and/or other encoding gradients, applying a correction gradient block, and/or correcting residual errors in orientation, pose, and/or gradient/phase.
795 Citations
20 Claims
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1. A magnetic resonance system configured to correct intra-scan motion during a magnetic resonance scan, the system comprising:
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a magnetic resonance scanner configured to; apply at least a first pulse sequence comprising one or more RF pulses; and generate a magnetic field gradient comprising a correction gradient; a motion tracking system configured to; detect motion of a subject; and generate motion data corresponding to the motion of the subject; one or more computer readable storage devices configured to store one or more modules, the one or more modules including a correction gradient calculation module; and one or more hardware computer processors in communication with the one or more computer readable storage devices and configured to execute the one or more modules to cause the magnetic resonance scanner to; generate the correction gradient, the correction gradient being generated based on at least a first gradient moment, wherein the first gradient moment is calculated by the correction gradient calculation module based on at least an integral of the motion data and the one or more RF pulses of the first pulse sequence, and apply the correction gradient to the subject after all of the one or more RF pulses are applied to the subject but prior to detecting signals emitted from the subject in response to the application of all of the one or more RF pulses and the correction gradient, to prospectively correct one or more errors in the first gradient moment due to movement of the subject during the magnetic resonance scan; and detect the signals emitted from the subject in response to the application of all of the one or more RF pulses and the correction gradient for data acquisition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A computer-readable, non-transitory storage medium having a computer program stored thereon for causing a suitably programmed computer system to process by one or more processors computer-program code by performing a method for correcting intra-scan motion during a magnetic resonance scan when the computer program is executed on the suitably programmed computer system, the method comprising:
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causing a magnetic resonance scanner to apply at least a first pulse sequence comprising one or more RF pulses, wherein the magnetic resonance scanner is configured to generate a magnetic field gradient comprising a correction gradient; receiving electronic motion data from a motion tracking system, wherein the motion tracking system is configured to detect motion of a subject and generate the motion data corresponding to the motion of the subject; generating, by a correction gradient calculation module, the correction gradient, the correction gradient being generated based on at least a first gradient moment, wherein the first gradient moment is calculated by the correction gradient calculation module based on at least an integral of the motion data and the one or more RF pulses of the first pulse sequence; and causing, by the computer system, the magnetic resonance scanner to apply the correction gradient to the subject after all of the one or more RF pulses are applied to the subject but prior to detecting signals emitted from the subject in response to the application of all of the one or more RF pulses and the correction gradient, to prospectively correct one or more errors in the first gradient moment due to movement of the subject during the magnetic resonance scan; and causing, by the computer program, the magnetic resonance scanner to detect the signals emitted from the subject in response to the application of all of the one or more RF pulses and the correction gradient for data acquisition, wherein the computer system comprises a computer processor and electronic memory. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification