Robert Peltekov

EECS Department, University of California, Berkeley

Technical Report No. UCB/EECS-2024-163

August 9, 2024

http://www2.eecs.berkeley.edu/Pubs/TechRpts/2024/EECS-2024-163.pdf

Developed to enhance MRI scan quality, the Shim Tool is a novel and adaptable software to correct B0 field inhomogeneity using local and conformal DC coil arrays. The Shim Tool orchestrates this operation by automating actions between an MRI scanner in sync with commanding currents in shim loop elements powered by the Open Source Current Driver. A custom-built array of shim coils, designed to be conformal and malleable, were used by the Shim Tool to reduce improve B0 field inhomogeneity. Root mean squared error (RMSE) of the fieldmaps was reduced by 63 percent on average and improved bSSFP/EPI image quality across 2D scans of a spherical ball phantom. The tool and developed hardware provide a means to shim any FOV using low-profile hardware in multi-modal studies, such as TMS/EEG/fMRI, and generally improve the acquisition quality of any MRI machine.

Advisors: Michael Lustig

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BibTeX citation:

@mastersthesis{Peltekov:EECS-2024-163,
    Author= {Peltekov, Robert},
    Title= {Berkeley MRI Shimming Tool: Online B0 Shimming using Conformal and Local DC Arrays},
    School= {EECS Department, University of California, Berkeley},
    Year= {2024},
    Month= {Aug},
    Url= {http://www2.eecs.berkeley.edu/Pubs/TechRpts/2024/EECS-2024-163.html},
    Number= {UCB/EECS-2024-163},
    Abstract= {Developed to enhance MRI scan quality, the Shim Tool is a novel and adaptable software to correct B0 field inhomogeneity using local and conformal DC coil arrays. The Shim Tool orchestrates this operation by automating actions between an MRI scanner in sync with commanding currents in shim loop elements powered by the Open Source Current Driver. A custom-built array of shim coils, designed to be conformal and malleable, were used by the Shim Tool to reduce improve B0 field inhomogeneity. Root mean squared error (RMSE) of the fieldmaps was reduced by 63 percent on average and improved bSSFP/EPI image quality across 2D scans of a spherical ball phantom. The tool and developed hardware provide a means to shim any FOV using low-profile hardware in multi-modal studies, such as TMS/EEG/fMRI, and generally improve the acquisition quality of any MRI machine.},
}

EndNote citation:

%0 Thesis
%A Peltekov, Robert 
%T Berkeley MRI Shimming Tool: Online B0 Shimming using Conformal and Local DC Arrays
%I EECS Department, University of California, Berkeley
%D 2024
%8 August 9
%@ UCB/EECS-2024-163
%U http://www2.eecs.berkeley.edu/Pubs/TechRpts/2024/EECS-2024-163.html
%F Peltekov:EECS-2024-163