Weekend Educational Session
Multi-Coil B0 Field Modelling & Systems
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Session Topic: Multi-Coil B0 Field Modelling & Systems
Session Sub-Topic: Multi-Coil B0 Field Modelling & Systems
Weekend Course
ORGANIZERS: Ergin Atalar, Christoph Juchem
| Saturday Parallel 4 Live Q&A | Saturday, 8 August 2020, 16:00 - 16:30 UTC | Moderators: : Ergin Atalar & Irena Zivkovic |
Skill Level: Basic to Intermediate
Session Number: WE-09
Overview
The course introduces multi-coil B0 magnetic field modelling from the first principles and simulation approaches to the latest theoretical and experimental developments. Applications of multi-coil B0 field synthesis for shimming and spatial encoding for MRI will be discussed and compared to conventional B0 field generation that is based on spherical harmonic shapes. The course comprises all aspects from the theoretical design and application of multi-coil setups to the construction of hardware, implementation and use.
Target Audience
The course is intended for everybody in the MR scientific community who wishes to learn about the concepts and applications of multi-coil B0 field generation employing basis field shapes that lack orthogonality. While primarily designed for Ph.D. candidates and recent Ph.D. post-graduates in physics, engineering and related fields, this course is also suited for MR scientists and physicians who seek a better understanding of specific aspects and the potential of multi-coil B0 applications for their research. Researchers who consider to employ multi-coil B0 technology in their work will find this course particularly helpful.
Educational Objectives
As a result of attending this course, participants should be able to:
- Recognize potential and limitations of B0 field generation based on spherical harmonic shapes;
- Describe the principles of multi-coil B0 field modelling;
- Summarize multi-coil hardware architecture and the underlying physics;
- Explain the difference between static and dynamic applications;
- Define the difference between dynamic shimming and multi-coil MRI;
- Recognize the importance of high-level coil calibration and computational methods;
- Explain potential and challenges of the various multi-coil concepts and potential combination with RF technology;
- Describe the simulation procedures for theoretical multi-coil hardware design; and
- Describe procedures and challenges for the establishment, implementation and use of multi-coil hardware.
| Introduction to the B0 Multi-Coil Technique
Suryanarayana Umesh Rudrapatna
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| Combined B0 & RF Arrays
Nicolas Arango
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| Multi-Coil B0 Shimming of the Spinal Cord
Ryan Topfer
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| Multi-Coil B0 Shimming in the Body
Hui Han
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Multi-Coil B0 Shimming with Irregular Coil Arrays
Jiazheng Zhou
Ultra-high field (UHF) magnetic resonance imaging (MRI) enables functional brain images with sub-millimeter spatial resolution. However, susceptibility induced magnetic field (B0) variations within tissue are the source of various artifacts. Shim coils of different shape and size are applied to reduce these B0 inhomogeneity. However, most shim coils only have a regular shape and distribute current pattern on a cylinder surface or close-fit helmet. The difference in performance between current multi coil array and irregular shape multi coil array has not been explored. The optimization methods for multi-coil shim arrays are discussed, together with design and construction procedure.
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| Imaging with B0 Coil Arrays
Koray Ertan
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Matrix Gradient Systems
Sebastian Littin
A matrix gradient systems allows to synthesize spatial encoding magnetic fields (SEMs) for new encoding methods. An overview of the implementation and possible applications is given.
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| Multi-Coil B0 Field Modeling for Accessible MR System
Sebastian Theilenberg
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