US 11,998,309 B2
Magnetic resonance facility operation
Mario Zeller, Erlangen (DE); Michael Köhler, Nuremberg (DE); and Dominik Paul, Bubenreuth (DE)
Assigned to Siemens Healthineers AG, Forchheim (DE)
Filed by Siemens Healthcare GmbH, Erlangen (DE)
Filed on Mar. 31, 2023, as Appl. No. 18/129,221.
Claims priority of application No. 10 2022 203 251.9 (DE), filed on Apr. 1, 2022.
Prior Publication US 2023/0309850 A1, Oct. 5, 2023
Int. Cl. G01V 3/00 (2006.01); A61B 5/055 (2006.01)
CPC A61B 5/055 (2013.01) [G06T 2207/10088 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method for operating a magnetic resonance device in which a measurement gradient pulse is used to record magnetic resonance signals for sampling k-space along a trajectory section, wherein the measurement of the magnetic resonance signals takes place at recording times forming a measurement sampling pattern in a recording time window during the measurement gradient pulse and a shape function describing a time profile of the measurement gradient pulse is used to assign magnetic resonance signals to k-space points, wherein, in order to ascertain correction information relating to deviations of a real time profile of the measurement gradient pulse from an assumed target profile of the measurement gradient pulse in the recording time window to be used in an imaging measurement during an ascertaining process, the method comprises:
the magnetic resonance device measuring a first correction to ascertain first magnetic resonance signals of the trajectory section by applying the measurement sampling pattern to the measurement gradient pulse under predetermined measurement conditions;
the magnetic resonance device measuring a second correction to ascertain second magnetic resonance signals of the trajectory section under the predetermined measurement conditions using a reference sampling pattern at gradient conditions of the measurement gradient pulse and/or a reference gradient pulse for which fewer deviations from an assigned reference target profile are expected; and
when a deviation criterion comparing the first and second magnetic resonance signals is satisfied, a correction unit of a control device of the magnetic resonance device ascertaining a correction function for the shape function as correction information by aligning the first and the second magnetic resonance signals to one another to improve a quality of magnetic resonance image data produced by the magnetic resonance device.