US 12,228,628 B2
Method for improved positioning of slices in which measurement data is to be recorded using a magnetic resonance system
David Grodzki, Erlangen (DE)
Assigned to Siemens Healthineers AG, Erlangen (DE)
Filed by Siemens Healthcare GmbH, Erlangen (DE)
Filed on Dec. 30, 2022, as Appl. No. 18/091,624.
Claims priority of application No. 102021215124.8 (DE), filed on Dec. 30, 2021.
Prior Publication US 2023/0213602 A1, Jul. 6, 2023
Int. Cl. G01V 3/00 (2006.01); A61B 5/055 (2006.01); G01R 33/54 (2006.01); G01R 33/483 (2006.01)
CPC G01R 33/543 (2013.01) [A61B 5/055 (2013.01); G01R 33/4835 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for improved positioning of slices in which measurement data is to be recorded by means of a magnetic resonance system, comprising the steps:
loading, by a controller of the magnetic resonance system, non-linearity data describing a non-linearity of a gradient unit of the magnetic resonance system, the controller including an adaptation unit and a pulse sequence unit;
providing, using a user interface of the magnetic resonance system, at least one planning image of an examination object situated in a measuring volume of the magnetic resonance system, the planning image being distortion-corrected based on the non-linearity data;
selecting, using the user interface, a desired field of view (FOV) and desired slices in the at least one planning image;
loading, by the pulse sequence unit, a measurement protocol configured for recording of the measurement data, the measurement protocol including switchable gradients and emittable radio-frequency (RF) pulses;
adapting, by the adaptation unit, the switchable gradients and/or the emittable RF pulses based on the measurement protocol, as a function of the non-linearity data and the desired slices, such that the desired slices are excited despite the non-linearities of the gradient unit, wherein the adaptation unit is connected between the user interface and the pulse sequence unit; and
controlling, by the controller, the pulse sequence unit to perform the loaded measurement protocol in the selected field of view, using the adapted switchable gradients and/or adapted RF pulses, to record the measurement data.