Method and measuring apparatus for measuring a magnetic field in a field of view of a magnetic resonance facility
AssigneeSiemens Healthineers AG
InventorStefan Popescu
Life of this patent
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Abstract
A method for measuring a magnetic field in a field of view of a magnetic resonance facility includes: providing a measuring apparatus including at least one magnetic field sensor; measuring sensor data describing the magnetic field at a plurality of measuring points on a measuring surface enclosing at least part of the field of view; and ascertaining magnetic field information, which models the magnetic field three-dimensionally, at least within the field of view, from the sensor data, wherein the measuring points are selected in a uniformly distributed sampling pattern for uniform sampling of the entire measuring surface.
Claims18
A method for measuring a magnetic field in a field of view of a magnetic resonance facility, the method comprising:
- providing a measuring apparatus comprising at least one magnetic field sensor;
- measuring sensor data describing the magnetic field at measuring points on a measuring surface enclosing at least part of the field of view, wherein the measuring surface is a spherical surface;
- and
- ascertaining magnetic field information that models the magnetic field three-dimensionally, at least within the field of view, from the sensor data,
- wherein the measuring points are selected in a uniformly distributed sampling pattern for uniform sampling of an entirety of the measuring surface, and
- wherein the measuring points on the measuring surface are determined as a Fibonacci lattice using a Fibonacci sphere algorithm.
A measuring apparatus for measuring a magnetic field in a field of view of a magnetic resonance facility, the measuring apparatus comprising:
- a carrier component having at least one magnetic field sensor;
- a moving facility configured to move the carrier component;
- and
- a control facility configured to measure sensor data describing the magnetic field by uniformly sampling a measuring surface enclosing at least part of the field of view at a plurality of measuring points in a uniformly distributed sampling pattern on an entirety of the measuring surface by actuating the moving facility and the at least one magnetic field sensor,
- wherein the measuring surface is a spherical surface, and
- wherein the measuring points on the measuring surface are determined as a Fibonacci lattice using a Fibonacci sphere algorithm.
A measuring apparatus for measuring a magnetic field in a field of view of a magnetic resonance facility, the measuring apparatus comprising:
- a carrier component having at least one magnetic field sensor;
- a moving facility configured to move the carrier component;
- and
- a control facility configured to measure sensor data describing the magnetic field by uniformly sampling a measuring surface enclosing at least part of the field of view at a plurality of measuring points in a uniformly distributed sampling pattern on an entirety of the measuring surface by actuating the moving facility and the at least one magnetic field sensor,
- wherein the carrier component has a carrier surface covering at least part of the measuring surface,
- wherein the moving facility has at least two rotation actuators for rotation about mutually perpendicular axes of rotation for positioning the carrier surface on the measuring surface, and
- wherein the moving facility has a circular arc arm configured to rotate about a horizontal axis of rotation by a first rotation actuator of the at least two rotation actuators to which the carrier component is coupled via a guide block configured to be displaced by a second rotation actuator of the at least two rotation actuators, or
- wherein the moving facility has a frame arm configured to rotate about the horizontal axis of rotation by the first rotation actuator of the at least two rotation actuators to which the carrier component is coupled at an end facing away from the first rotation actuator along the horizontal axis of rotation via the second rotation actuator of the at least two rotation actuators, and the frame arm defines a free space along the horizontal axis of rotation corresponding at least to a diameter of the measuring surface for rotating the carrier component by the second rotation actuator.
Dependencies are inferred from the claim text.