Abstract #3454

Automatic Z-Shimming Based on a Real-Time Feedback Optimization Framework in BOLD-EPI

Yu-Wei Tang¹, Teng-Yi Huang¹

¹Department of Electrical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan

Z-shimming is a useful method for correcting the susceptibility-induced signal losses in BOLD-EPI. For seeking the best z-shim images for compensating the lost signal, an automatic real time z-shimming method was proposed in this study. By implementing a feedback loop between the scanner and a PC through network connection, the best z-shim value could be converged by the optimization algorithm. In conclusion, our method not only can amend the signal losses problem successfully but also provide rapider searching time and higher accuracy of optimal z-shim value.