METHOD AND MAGNETIC RESONANCE SYSTEM FOR ACQUIRING MAGNETIC RESONANCE DATA
First Claim
1. A method for acquiring magnetic resonance data, comprising:
- operating a magnetic resonance apparatus with a magnetic resonance sequence to acquire magnetic resonance data from a subject situated in the magnetic resonance apparatus;
in a first portion of said sequence, operating said magnetic resonance apparatus to simultaneously acquire magnetic resonance signals from respective multiple slices of the subject;
in a second portion of said sequence that follows said first portion, operating said magnetic resonance apparatus to acquire additional data with a spatial resolution that is lower than a spatial resolution at which said magnetic resonance data are acquired, by radiating a radio-frequency pulse and implementing a slice-specific readout of said additional data for respective slices among said multiple slices, at respective readout times that are chronologically offset with respect to each other following a single continuous excitation of nuclear spins in the subject by said radio-frequency pulses with an individual readout for each slice, thereby obtaining a separate set of additional data for each slice among said multiple slices; and
in a processor, reconstructing a magnetic resonance image of said slices in a reconstruction algorithm dependent on said additional data.
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Accused Products
Abstract
In a method for acquiring magnetic resonance data with a magnetic resonance system using a magnetic resonance sequence, the sequence has a first partial sequence in which magnetic resonance data are acquired for multiple slices that have to be acquired simultaneously, from which image data for the individual slices are calculated by a reconstruction algorithm. The sequence also has a second partial sequence for determining additional data, which are used to evaluate and/or assess the magnetic resonance data, and which have a spatial resolution that is lower than the magnetic resonance data, in which radio-frequency pulses and readout processes take place in a slice-specific manner through a time offset within a single measuring process, in which a single continuous excitation period with the radio-frequency pulses and a single continuous readout period with the readout processes follow one another, so that separate additional data are directly determined for each slice.
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Citations
10 Claims
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1. A method for acquiring magnetic resonance data, comprising:
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operating a magnetic resonance apparatus with a magnetic resonance sequence to acquire magnetic resonance data from a subject situated in the magnetic resonance apparatus; in a first portion of said sequence, operating said magnetic resonance apparatus to simultaneously acquire magnetic resonance signals from respective multiple slices of the subject; in a second portion of said sequence that follows said first portion, operating said magnetic resonance apparatus to acquire additional data with a spatial resolution that is lower than a spatial resolution at which said magnetic resonance data are acquired, by radiating a radio-frequency pulse and implementing a slice-specific readout of said additional data for respective slices among said multiple slices, at respective readout times that are chronologically offset with respect to each other following a single continuous excitation of nuclear spins in the subject by said radio-frequency pulses with an individual readout for each slice, thereby obtaining a separate set of additional data for each slice among said multiple slices; and in a processor, reconstructing a magnetic resonance image of said slices in a reconstruction algorithm dependent on said additional data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A magnetic resonance apparatus comprising:
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a magnetic resonance data acquisition unit; a control unit configured to operate the magnetic resonance data acquisition unit with a magnetic resonance sequence to acquire magnetic resonance data from a subject situated in the magnetic resonance data acquisition unit; said control unit being configured to operate said magnetic resonance data acquisition unit in a first portion of said sequence, to simultaneously acquire magnetic resonance signals from respective multiple slices of the subject; said control unit being configured to operate said magnetic resonance data acquisition unit in a second portion of said sequence that follows said first portion, to acquire additional data with a spatial resolution that is lower than a spatial resolution at which said magnetic resonance data are acquired, by radiating a radio-frequency pulse and implementing a slice-specific readout of said additional data for respective slices among said multiple slices, at respective readout times that are chronologically offset with respect to each other following a single continuous excitation of nuclear spins in the subject by said radio-frequency pulses with an individual readout for each slice, thereby obtaining a separate set of additional data for each slice among said multiple slices; and a processor configured to reconstruct a magnetic resonance image of said slices in a reconstruction algorithm dependent on said additional data.
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Specification