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US 11,231,477 B2Granted
Acquiring magnetic resonance (MR) data by means of echo trains
AssigneeSiemens Healthcare GmbH
InventorsChristoph Forman, Dominik Paul, Flavio Carinci
Life of this patent
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Abstract
Techniques are disclosed relating to the generation of a magnetic resonance (MR) image of a predetermined portion of a volume of an examination object. MR data of the portion may be acquired using echo trains in a first step and in a second step, with each of the echo trains acquiring MR data of a plurality of k-space lines. The plurality of k-space lines extend parallel to one another and perpendicular to a common plane such that per k-space line, one intersection point within a plane results. The MR image is then reconstructed using the acquired MR data.
Claims20
A computer-implemented method for creating, using a magnetic resonance (MR) system, a MR image of a predetermined three-dimensional volume portion of a patient, the method comprising:
- operating a MR data acquisition scanner to acquire, during a first step, MR data of the predetermined three-dimensional volume portion of the patient using a first plurality of echo trains;
- operating the MR data acquisition scanner to acquire, during a second step, MR data of the predetermined three-dimensional volume portion of the patient using a second plurality of echo trains, the MR data acquired during the first step corresponding to first k-space lines associated with the first plurality of echo trains, and the MR data acquired during the second step corresponding to second k-space lines associated with the second plurality of echo trains;
- and
- operating the MR data acquisition scanner to reconstruct, using the MR data acquired during the first step and the second step, the MR image,
- wherein the first and second k-space lines are arranged so as to extend parallel to one another and perpendicular relative to a plane such that one intersection point within the plane exists per each k-space line from among the first and second k-space lines,
- wherein a number of intersection points for the first k-space lines corresponding to the MR data acquired during the first step is larger than a number of intersection points for the second k-space lines corresponding to the MR data acquired during the second step,
- wherein a set of intersection points for the second k-space lines corresponding to the MR data acquired during the second step and a set of intersection points for the first k-space lines corresponding to the MR data acquired during the first step have a non-zero intersection value, and
- wherein an average spacing of intersection points for the second k-space lines corresponding to the MR data acquired during the second step is greater than an average spacing of intersection points for the first k-space lines corresponding to the MR data acquired during the first step.
5 more elements
A magnetic resonance (MR) system for creating a MR image of a predetermined three-dimensional volume portion of a patient, the system comprising:
- a magnetic resonance data acquisition scanner configured to:
- acquire, during a first step, MR data of the predetermined three-dimensional volume portion of the patient using a first plurality of echo trains;
- acquire, during a second step, MR data of the predetermined three-dimensional volume portion of the patient using a second plurality of echo trains,
- wherein the MR data acquired during the first step corresponds to first k-space lines associated with the first plurality of echo trains, and the MR data acquired during the second step corresponds to second k-space lines associated the second plurality of echo trains;
- and
- a control computer configured to reconstruct, using the MR data acquired during the first step and the second step, the MR image,
- wherein the first and second k-space lines are arranged so as to extend parallel to one another and perpendicular relative to a plane such that one intersection point within the plane exists per each k-space line from among the first and second k-space lines,
- wherein a number of intersection points for the first k-space lines corresponding to the MR data acquired during the first step is larger than a number of intersection points for the second k-space lines corresponding to the MR data acquired during the second step,
- wherein a set of intersection points for the second k-space lines corresponding to the MR data acquired during the second step and a set of intersection points for the first k-space lines corresponding to the MR data acquired during the first step have a non-zero intersection value, and
- wherein an average spacing of intersection points for the second k-space lines corresponding to the MR data acquired during the second step is greater than an average spacing of intersection points for the first k-space lines corresponding to the MR data acquired during the first step.
7 more elements
A non-transitory computer readable medium loaded onto a control device of a magnetic resonance (MR) system for creating a MR image of a predetermined three-dimensional volume portion of a patient, the non-transitory computer readable medium having instructions stored thereon that, when executed by the control device, cause the MR system to:
- acquire, during a first step, MR data of the predetermined three-dimensional volume portion of the patient using a first plurality of echo trains;
- acquire, during a second step, MR data of the predetermined three-dimensional volume portion of the patient using a second plurality of echo trains, the MR data acquired during the first step corresponding to first k-space lines associated with each of the first plurality of echo trains, and the MR data acquired during the second step corresponding to second k-space lines associated with the second plurality of echo trains;
- and
- reconstruct, using the MR data acquired during the first step and the second step, the MR image,
- wherein the first and second k-space lines are arranged so as to extend parallel to one another and perpendicular relative to a plane such that one intersection point within the plane exists per each k-space line from among the first and second k-space lines,
- wherein a number of intersection points for the first k-space lines corresponding to the MR data acquired during the first step is larger than a number of intersection points for the second k-space lines corresponding to the MR data acquired during the second step,
- wherein a set of intersection points for the second k-space lines corresponding to the MR data acquired during the second step and a set of intersection points for the first k-space lines corresponding to the MR data acquired during the first step have a non-zero intersection value, and
- wherein an average spacing of intersection points for the second k-space lines corresponding to the MR data acquired during the second step is greater than an average spacing of intersection points for the first k-space lines corresponding to the MR data acquired during the first step.
5 more elements
Dependencies are inferred from the claim text.