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Zero- to low-field MRI with averaging of concomitant gradient fields
Carlos A Meriles1, Dimitris Sakellariou, Andreas H Trabesinger
1Department of Chemistry, University of California, and Materials Sciences Division, Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. cmeriles@sci.ccny.cuny.edu
Summary
Pulsed magnetic-field averaging overcomes limitations in low-field magnetic resonance imaging (MRI). This technique enables image retrieval without strong static magnetic fields, improving image fidelity and resolution.
Area of Science:
- Medical Imaging
- Physics
Background:
- Magnetic resonance imaging (MRI) faces limitations in low-field settings due to insufficient static magnetic fields to suppress gradient field components.
- This restricts optimal image fidelity and resolution in low-field MRI.
Purpose of the Study:
- To introduce pulsed magnetic-field averaging as a method to overcome static magnetic field limitations in MRI.
- To demonstrate image retrieval in low-field MRI without strong uniform magnetic fields.
Main Methods:
- Utilizing pulsed magnetic-field averaging to relax constraints imposed by weak static magnetic fields.
- Employing symmetrized pulse sequences for error compensation.
Main Results:
- Image retrieval is possible using pulsed low fields despite full spatial variation of encoding gradients.
- Error-compensation schemes mitigate artifacts from strong gradients and pulse imperfections.
Conclusions:
- Pulsed magnetic-field averaging offers a viable solution for enhancing low-field MRI.
- This approach improves image quality and expands the applicability of MRI in resource-limited settings.