10:00 AM - 11:00 AM
Diffusion MRI with Spiral Readouts
RSL Future Leaders Seminar Series
Spiral readouts have been rarely used in diffusion MRI despite their several favorable properties (e.g. short echo times) because they are more sensitive to static B0 non-uniformity and gradient imperfections than conventional EPI readouts. To address these issues simultaneously, we use an expanded signal model that includes actual magnetic field dynamics measured with NMR probes as well as static off-resonance. With this approach, competitive image quality has been achieved with single-shot spiral readouts in diffusion imaging. I divide my talk into two parts: (i) introducing our recent work on the SNR benefit of spiral readouts over EPI readouts in diffusion MRI; (ii) discussing our ongoing work on the reconstruction of multi-shot diffusion data acquired with highly-segmented spiral and EPI readouts.
Lee Y, Wilm BJ, Brunner DO, Gross S, Schmid T, Nagy Z, Pruessmann KP. On the signal-to-noise ratio benefit of spiral acquisition in diffusion MRI. Magn Reson Med. 2021 Apr;85(4):1924-1937. doi: 10.1002/mrm.28554. [PMID: 33280160]
Yoojin Lee, PhD
Dr. Lee is a post-doctoral reseracher at the ETH Zurich and the University of Zurich in Prof. Klaus Pruessmann's group. She received her PhD in Information Technology and Electrical Engineering at ETH Zurich in 2020. Her main research focuses on diffusion MRI ranging from data acquisition and image reconstruction to post-processing and data analysis. Her broader research interests include quantitative MRI such as diffusion MRI, quantitative relaxometry, and perfusion MRI using arterial spin fusion.