Continuous moving-table MRI contrast manipulation and/or update of scanning parameters
First Claim
1. A continuous motion magnetic resonance imaging method in which an imaged subject moves continuously during data acquisition, the method comprising:
- determining values of scan parameters including at least a velocity, a field of view length in a direction of subject movement, and a preparation sequence time;
continuously moving the imaged subject at the determined velocity;
during the continuous moving, acquiring magnetic resonance imaging data of the imaged subject using the determined scan parameters, the acquiring including performing one or more preparatory operations during one or more time intervals;
correcting the acquired magnetic resonance imaging data for a spatial non-uniformity based on a non-uniformity mapping performed as one of the one or more preparatory operations;
reconstructing the acquired and corrected data into an image of the field of view; and
continuing the acquiring, correcting, and reconstructing during the continuous moving to generate an elongated image spanning a plurality of fields of view.
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Accused Products
Abstract
A continuous table motion magnetic resonance imaging system includes a processor (70) for determining values of scan parameters including at least a subject velocity, a field of view length in the direction of the table velocity, and a preparation sequence time. The acquisition includes performing one or more preparatory operations (54) to manipulate image contrast or to update scanning parameters during table motion. A table (16) is provided for continuously moving a supported imaging subject at the determined velocity. A magnetic resonance imaging scanner (10) through which the table continuously moves the subject acquires magnetic resonance imaging data of the imaged subject during the continuous moving using the determined scan parameters. A reconstruction processor (30, 34, 40) reconstructs the acquired data into an image of the field of view.
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Citations
20 Claims
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1. A continuous motion magnetic resonance imaging method in which an imaged subject moves continuously during data acquisition, the method comprising:
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determining values of scan parameters including at least a velocity, a field of view length in a direction of subject movement, and a preparation sequence time; continuously moving the imaged subject at the determined velocity; during the continuous moving, acquiring magnetic resonance imaging data of the imaged subject using the determined scan parameters, the acquiring including performing one or more preparatory operations during one or more time intervals; correcting the acquired magnetic resonance imaging data for a spatial non-uniformity based on a non-uniformity mapping performed as one of the one or more preparatory operations; reconstructing the acquired and corrected data into an image of the field of view; and continuing the acquiring, correcting, and reconstructing during the continuous moving to generate an elongated image spanning a plurality of fields of view. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A continuous motion magnetic resonance imaging method in which an image subject moves continuously during data acquisition, the method comprising:
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continuously moving the imaged subject at a determined velocity; during the continuous moving, acquiring magnetic resonance imaging data of the imaged subject; correcting the acquired magnetic resonance imaging data for phase error introduced by traversal of the imaged subject through an inhomogeneous magnetic field during the continuous moving; reconstructing the acquired and corrected data into an image of the field of view; and continuing the acquiring and reconstructing during the continuous moving to generate an elongated image spanning a plurality of fields of view. - View Dependent Claims (14, 15, 16)
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17. A continuous motion magnetic resonance imaging system comprising:
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a processor for determining values of scan parameters including at least a subject velocity, a field of view length in the direction of the table velocity, and a preparation sequence time; a table for continuously moving a supported imaging subject at the determined velocity; a magnetic resonance imaging scanner through which the table continuously moves the subject, the scanner acquiring magnetic resonance imaging data of the imaged subject during the continuous moving using the determined scan parameters, the acquiring including performing one or more preparatory operations during one or more time intervals; and a reconstruction processor for reconstructing the acquired data into an image of the field of view, the reconstruction processor including a correction processor for correcting the acquired data for radio frequency excitation inhomogeneity, the reconstruction processor reconstructing the corrected acquired data.
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18. A continuous motion magnetic resonance imaging system comprising:
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a processor for determining values of scan parameters including at least a subject velocity, a field of view length in the direction of the table velocity, and a preparation sequence time; a table for continuously moving a supported imaging subject at the determined velocity; a magnetic resonance imaging scanner through which the table continuously moves the subject, the scanner acquiring magnetic resonance imaging data of the imaged subject during the continuous moving using the determined scan parameters, the acquiring including performing one or more preparatory operations during one or more time intervals; and a reconstruction processor for reconstructing the acquired data into an image of the field of view, the reconstruction processor including a correction processor for correcting the acquired data for magnetic field inhomogeneity, the reconstruction processor reconstructing the corrected acquired data. - View Dependent Claims (19, 20)
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Specification