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US 10,295,640 B2Granted
Method and apparatus for movement correction of magnetic resonance measurement data
AssigneeSiemens Healthcare GmbH
InventorThomas Beck
Life of this patent
Estimating the term…
Abstract
In a method and magnetic resonance apparatus for generating motion-corrected magnetic resonance measurement data, reference data and measurement data are acquired from multiple sub-regions of an examination region of a subject, and first and second items of movement information are respectively generated for the respective sub-regions, and motion-corrected data for the respective sub-regions is generated by transforming k-space data using the first and second items of movement information.
Claims18
A method for movement correction of magnetic resonance measurement data, comprising:
- operating a magnetic resonance data acquisition scanner so as to execute a magnetic resonance imaging procedure that includes executing a reference measurement at a first point in time during said magnetic resonance imaging procedure, wherein reference data are acquired from a reference region of an examination subject by the reference measurement;
- operating the data acquisition scanner in said magnetic resonance imaging procedure, at a time after said first point in time, to execute an image measurement wherein magnetic resonance measurement data sets are acquired respectively from a plurality of sub-regions of an examination region of the subject, including acquiring a first set of magnetic resonance measurement data from a first sub-region of said plurality of sub-regions, and acquiring a second set of magnetic resonance data from a second sub-region of said plurality of sub-regions;
- entering said first set of magnetic resonance measurement data into a memory organized as k-space, as a first k-space data set, and entering said second set of magnetic resonance measurement data into said memory organized as k-space, as a second k-space data set;
- providing said reference data and said first and second magnetic resonance measurement data sets to a computer and, in said computer, determining a first item of movement information, representing movement of the subject, from said reference region and said first set of magnetic resonance measurement data;
- in said computer, determining a second item of movement information, also representing movement of the subject, from said reference region and said second set of magnetic resonance measurement data;
- in said computer, transforming said first k-space data set by applying said first item of movement information to said first k-space data set, and thereby producing a first transformed k-space data set that has been individually movement-corrected by said first items of movement information;
- in said computer, transforming said second k-space data set by applying the second item of movement information (e) to said second k-space data set, and thereby producing a second transformed k-space data set that has been individually movement-corrected by said second items of movement information;
- in said computer, converting a combination of the first transformed k-space data set and the second transformed k-space data set into the image domain and thereby obtaining movement-corrected magnetic resonance image data;
- and
- from said computer, making the movement-corrected magnetic resonance image data available as an output in electronic form, as a data file.
7 more elements
A magnetic resonance apparatus comprising:
- a magnetic resonance data acquisition scanner;
- a computer configured to operate a magnetic resonance data acquisition scanner so as to execute a magnetic resonance imaging procedure that includes executing a reference measurement at a first point in time during said magnetic resonance imaging procedure, wherein reference data are acquired from a reference region of an examination subject by the reference measurement;
- said computer being configured to operate the data acquisition scanner in said magnetic resonance imaging procedure, at a time after said first point in time, to execute an image measurement wherein magnetic resonance measurement data sets are acquired respectively from a plurality of sub-regions of an examination region of the subject, including acquiring a first set of magnetic resonance measurement data from a first sub-region of said plurality of sub-regions, and acquiring a second set of magnetic resonance data from a second sub-region of said plurality of sub-regions;
- said computer being configured to enter said first set of magnetic resonance measurement data into a memory organized as k-space, as a first k-space data set, and entering said second set of magnetic resonance measurement data into said memory organized as k-space, as a second k-space data set;
- said computer being configured to determine a first item of movement information, representing movement of the subject, from said reference region and said first set of magnetic resonance measurement data;
- said computer being configured to determine a second item of movement information, also representing movement of the subject, from said reference region and said second set of magnetic resonance measurement data;
- said computer being configured to transform said first k-space data set by applying said first item of movement information to said first k-space data set, and thereby producing a first transformed k-space data set that has been individually movement-corrected by said first items of movement information;
- said computer being configured to transform a second k-space data set by applying the second item of movement information to said second k-space data set, and thereby producing a second transformed k-space data set that has been individually movement-corrected by said second items of movement information;
- said computer being configured to convert a combination of the first transformed k-space data set and the second transformed k-space data set into the image domain and thereby obtaining movement-corrected magnetic resonance image data;
- and
- said computer being configured to make the movement-corrected magnetic resonance image data available as an output in electronic form, as a data file.
8 more elements
A non-transitory, computer-readable data storage medium encoded with programming instructions, said storage medium being loaded into a control and evaluation computer of a magnetic resonance apparatus that comprises a magnetic resonance data acquisition scanner, said program code causing said control and evaluation computer to:
- operate the magnetic resonance data acquisition scanner so as to execute a magnetic resonance imaging procedure that includes executing a reference measurement at a first point in time during said magnetic resonance imaging procedure, wherein reference data are acquired from a reference region of an examination subject by the reference measurement;
- operate the data acquisition scanner in said magnetic resonance imaging procedure, at a time after said first point in time, to execute an image measurement wherein magnetic resonance measurement data sets are respectively acquired from a plurality of sub-regions of an examination region of the subject, including acquiring a first set of magnetic resonance measurement data from a first sub-region of said plurality of sub-regions, and acquiring a second set of magnetic resonance data from a second sub-region of said plurality of sub-regions;
- enter said first set of magnetic resonance measurement data into a memory organized as k-space, as a first k-space data set, and entering said second set of magnetic resonance measurement data into said memory organized as k-space, as a second k-space data set;
- determine a first item of movement information, representing movement of the subject, from said reference region and said first set of magnetic resonance measurement data;
- determine a second item of movement information, also representing movement of the subject, from said reference region and said second set of magnetic resonance measurement data;
- transform said first k-space data set by applying said first item of movement information to said first k-space data set, and thereby producing a first transformed k-space data set that has been individually movement-corrected by said first items of movement information;
- transform said second k-space data set by applying the second item of movement information to said second k-space data set, and thereby producing a second transformed k-space data set that has been individually movement-corrected by said second items of movement information;
- convert a combination of the first transformed k-space data set and the second transformed k-space data set into the image domain and thereby obtaining movement-corrected magnetic resonance image data;
- and
- make the movement-corrected magnetic resonance image data available as an output in electronic form, as a data file.
7 more elements
Dependencies are inferred from the claim text.