US 11,698,431 B2
Method for acquiring reference data for a phase correction in magnetic resonance technology
Adam Kettinger, Bayern (DE); and Mario Zeller, Erlangen (DE)
Assigned to Siemens Healthcare GmbH, Erlangen (DE)
Filed by Siemens Healthcare GmbH, Erlangen (DE)
Filed on Sep. 28, 2021, as Appl. No. 17/487,671.
Claims priority of application No. 102020212173.7 (DE), filed on Sep. 28, 2020.
Prior Publication US 2022/0099780 A1, Mar. 31, 2022
Int. Cl. G01V 3/00 (2006.01); G01R 33/565 (2006.01); G01R 33/483 (2006.01); G01R 33/563 (2006.01); G01R 33/561 (2006.01)
CPC G01R 33/56554 (2013.01) [G01R 33/4835 (2013.01); G01R 33/5617 (2013.01); G01R 33/56341 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for acquiring measurement data of an object under examination and for acquiring reference data for a phase correction of the measurement data using a magnetic resonance (MR) system, the method comprising:
providing, by a MR scanner of the MR system, a radio frequency (RF) excitation pulse to excite spins in the object under examination;
providing, by the MR scanner, one or more RF refocusing pulses to refocus the spins excited by the RF excitation pulse;
acquiring, by a controller of the MR system, measurement data by recording echo signals of refocused spins excited by the RF excitation pulse by switching readout gradients that alternate in their polarity;
chronologically between the providing of the RF excitation pulse and the acquisition of the measurement data, recording, by the controller, at least two echo signals while switching readout gradients with different polarity to acquire reference data;
based on the acquired reference data, determining, by the controller, correction data for phase correction of phase errors contained in the measurement data; and
by the controller, generating an electronic signal representing the correction data and providing the electronic signal as an output of the controller.