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Abstract #5204

"Random" non-linear encoded MRI on standard clinical MRI systems

Fabian Bschorr1, Thomas Hüfken1, Tobias Lobmeyer1, Hanna Frantz1, Julian Schüle1, Tobias Speidel1, and Volker Rasche1,2
1Internal Medicine II, Ulm University Medical Center, Ulm, Germany, 2Core Facility Small Animal MRI, Ulm, Germany

Synopsis

Keywords: New Trajectories & Spatial Encoding Methods, Acquisition Methods

Motivation: Encoding strategies using inhomogeneous magnetic fields offer new flexibility and/or acceleration of image acquisition. However, usually, additional hardware is required limiting its audience to a narrow range of sites.

Goal(s): The goal of this work is the demonstration of image encoding on a clinical MRI system using inhomogeneous magnetic fields.

Approach: The encoding capabilities of “random” encoding schemes were simulated and validated by using the already built-in higher-order shim coil to generate the inhomogeneous magnetic fields.

Results: Despite long switching times of the shim coils, the higher-order shim terms were successfully used to encode an image in an ZTE-like fashion.

Impact: This work demonstrates that the higher-order shim coils of a clinical MRI system can be utilized for first demonstrations of non-linear encoding schemes without the need of additional, mostly expensive and/or labour-intensive hardware.

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Keywords