Meeting Banner
Abstract #3293

A stitching method for dynamic field monitoring using NMR probes: validation in simulation and human experiments

Jinyuan Zhang1,2,3, Zhentao Zuo1,3, Rong Xue1,3, Yan Zhuo1,3, Cameron Cushing4, Alexander Bratch5, Edward Auerbach5, Andrea Grant5, Jing An6, Kamil Ugurbil5, Xiaoping Wu5, and Zihao Zhang1,2,3
1State Key Laboratory of Brain and Cognitive Science, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China, 2Anhui Province Key Laboratory of Biomedical Imaging and Intelligent Processing, Institute of Artificial Intelligence, Hefei Comprehensive National Science Center, Hefei, China, 3University of Chinese Academy of Sciences, Beijing, China, 4Skope MRT, Zurich, Switzerland, 5CMRR, Radiology, University of Minnesota, Minneapolis, MN, United States, 6DL, Siemens Shenzhen Magnetic Resonance Ltd, Shenzhen, China

Synopsis

Keywords: System Imperfections, System Imperfections: Measurement & Correction

Motivation: Last year we proposed and demonstrated a stitching method that can be used to characterize sequences with higher resolution or longer readout.

Goal(s): To validate our stitching method by image reconstruction based on an extended signal model using simulation and real data experiments.

Approach: Image reconstruction and MR simulation incorporating higher-order field terms were devised by expanding MRIReco.jl and KomaMRI.jl. Human brain scans with spiral readouts were also conducted at 7 Tesla.

Results: In simulation, using stitching monitored field dynamics resulted in better image reconstruction. Likewise, using our stitching method in in-vivo experiments outperformed the standard field monitoring approach, especially at higher resolution.

Impact: Validated with both simulation and real data experiments, our proposed stitching method capable of characterizing challenging imaging gradients using commercially available hardware is believed to have a promise to advance many ultrahigh resolution MRI applications at ultrahigh field.

How to access this content:

For one year after publication, abstracts and videos are only open to registrants of this annual meeting. Registrants should use their existing login information. Non-registrant access can be purchased via the ISMRM E-Library.

After one year, current ISMRM & ISMRT members get free access to both the abstracts and videos. Non-members and non-registrants must purchase access via the ISMRM E-Library.

After two years, the meeting proceedings (abstracts) are opened to the public and require no login information. Videos remain behind password for access by members, registrants and E-Library customers.

Click here for more information on becoming a member.

Keywords