Researchers at Washington University in St. Louis have developed a method to improve image quality during MR imaging guided radiation therapy (MR-IGRT) by correcting for B0 fluctuation in real-time. The corrections reduce electromagnetic interference (EMI) between the MRI scanner and linear accelerator, which creates imaging artifacts.
Currently, EMI-related imaging issues prevent physicians from using more advanced volumetric modulated arc therapy (VMAT) techniques. VMAT use with MR-IGRT would dramatically reduce the procedure time per patient while improving tumor targeting.
- Curcuru AN, Lewis BC, Kim T, Yang D, & Gach HM. (2021). Effects of B0 eddy currents on imaging isocenter shifts in 0.35-T MRI-guided radiotherapy (MR-IGRT) system. Medical Physics, 48(6): 2929-2938.
- MR imaging guided radiation therapy (MR-IGRT)
- Reduces EMI between MRI and Linac subsystems
- Enables volumetric modulated arc therapy for MR-IGRT