Microwave seminar | 06 March 2023

Parallel imaging (PI) is among the most successful techniques for accelerating MRI acquisition. However, its performance is limited by the number, spatial appearance and independence of the sensitivity profiles of the employed multiple RF receive coil elements. We investigate if dynamic modulations of the receive RF coil sensitivities during image encoding can be used to improve parallel imaging, forming a novel degree of freedom in spatial encoding for MRI.
I will introduce some basic concepts of spatial encoding and parallel imaging in MRI, and show results from multiple prototype reconfigurable RF coil arrays that were custom-built for human head MRI at 9.4T.

Main paper/arXiv, related to the seminar, and other references

Glang, F.; Nikulin, A. V.; Bause, J.; Heule, R.; Steffen, T.; Avdievich, N.; Scheffler, K. Accelerated MRI at 9.4 T with Electronically Modulated Time-Varying Receive Sensitivities. Magnetic Resonance in Medicine 2022, 88 (2), 742–756. https://doi.org/10.1002/mrm.29245.

Basics:
- Deshmane, A.; Gulani, V.; Griswold, M. A.; Seiberlich, N. Parallel MR Imaging. Journal of Magnetic Resonance Imaging 2012, 36 (1), 55–72. https://doi.org/10.1002/jmri.23639.
- Hamilton, J.; Franson, D.; Seiberlich, N. Recent Advances in Parallel Imaging for MRI. Progress in Nuclear Magnetic Resonance Spectroscopy 2017, 101, 71–95. https://doi.org/10.1016/j.pnmrs.2017.04.002.