US 12,405,337 B2
System and method for measuring eddy currents with long time constants using a pseudo-continuous acquisition
Richard Scott Hinks, Sandia Park, NM (US); Andreas Ebel, Waukesha, WI (US); and Hua Li, Sussex, WI (US)
Assigned to GE Precision Healthcare LLC, Wauwatosa, WI (US)
Filed by GE Precision Healthcare LLC, Waukesha, WI (US)
Filed on Oct. 5, 2023, as Appl. No. 18/481,356.
Prior Publication US 2025/0116743 A1, Apr. 10, 2025
Int. Cl. G01R 33/58 (2006.01); G01R 33/48 (2006.01); G01R 33/561 (2006.01); G01R 33/565 (2006.01)
CPC G01R 33/58 (2013.01) [G01R 33/4818 (2013.01); G01R 33/5615 (2013.01); G01R 33/56518 (2013.01)] 20 Claims
OG exemplary drawing
 
9. A system for measuring eddy currents with long time constants, comprising:
a memory encoding processor-executable routines; and
a processor configured to access the memory and to execute the processor-executable routines, wherein the processor-executable routines, when executed by the processor, cause the processor to:
initiate a calibration scan of a phantom utilizing a magnetic resonance imaging (MRI) scanner;
utilize a train of gradient echo sequences to simultaneously generate and measure the eddy currents during the calibration scan, wherein both eddy current generation and measurement are completed within each gradient echo sequence of the train of gradient echo sequences;
acquire k-space data from the train of gradient echo sequences;
convert the k-space data to eddy current gradient fields; and
estimate the eddy currents as a function of time based on the eddy current gradient fields.