Patent ID: 11878188
Assignee: WASHINGTON UNIVERSITY
Field: Measurement (Instruments)
Classification: CPC A  G | IPC A  G

Claim 0:
1. A method for obtaining high-quality MR images for guidance of a treatment using an MR-IGRT system, the method comprising for each frame of a cine data MR data acquisition sequence:
producing, using the MR-IGRT system, a non-selective RF excitation pulse;
detecting, using the MR-IGRT system, a plurality of free induction decay (FID) signals;
calculating a center frequency offset based on the plurality of free induction decay (FID) signals;
modifying the image acquisition selective excitation RF pulses and receiver phase based on the center frequency offset;
obtaining an MR image dataset using the modified image acquisition selective excitation RF pulses and receiver phase; and
reconstructing a frame of the MR image, wherein the MR image comprises reduced EMI artifacts associated with gantry motion.