RF Systems Engineering
Hiroyuki Fujita, Lawrence W. Wald, Organizers

Saturday, 6 May, 08:30 - 18:15


This one-day course will provide the imaging physicist with the background, theory and methodology needed to understand the design and validation of the components of the RF system. The course will cover basic theory, function and characterization of the coils, trap and detuning circuits, preamplifiers, and TR switches which work together to form the backbone of the imaging experiment. It will provide practical advice on the methods used to measure, adjust and tune these components and will also cover the interaction of the electromagnetic fields with the body and SAR calculations.

Educational Objectives:
Upon completion of this course, participants should be able to:
• Explain the purpose and relevant performance measures for the RF chain used in the MRI scanner;
• Identify the principal components of the RF chain of the MRI scanner hardware and how they are designed;
• Describe the basic principles of RF electronics, the properties of RF components and devices, and the measurement tools used to characterize them;
• Describe the function and methods of characterizing preamplifiers, baluns and traps;
• Explain the methods for actively detuning an RF transmitter and receive coil;
• Identify the type of RF coil circuits for volume and surface coil arrays and how they are designed from the point of view of circuits;
• Explain the computational electromagnetics modeling methods to simulate RF coils; and
• Explain how to compute SAR parameters for a coil and test for other aspects of patient safety.

Audience Description:
This course is designed for the Ph.D.-level imaging scientist or clinician who does not necessarily have a background in RF engineering. We are aiming at the imaging scientist or clinician who wishes to understand more about the increasingly complex nature of the RF system in order to make better decisions about its limitations and applications; the imaging physicist who wishes to construct and test components of the RF chain needed for his or her specialized experiment; the postdoctoral level researcher interested in entering the sub-field of RF engineering for MRI applications; and scientists and clinicians with experience in MRI but who do not have a detailed education in RF engineering and its application to MR.

08:30 Overview of Signal Detection and the RF Chain Arne Reykowski, Ph.D.
09:15 Principles and Modeling of the Signal Detection by a Coil William A. Edelstein, Ph.D.
10:00 Introduction to the World of RF; Transmission Lines Patrick J. Ledden, M.D.
Impedence Transformers, and RF Components    
10:45 Break - Meet the Teachers    
11:00 RF Measurements: the Network Analyzer and Smith Chart Ed B. Boskamp, Ph.D.
11:45 Preamp Design and Characterization  George R. Duensing, Ph.D.
12:30 Break    
12:30 - 12:45 - Meet the Teachers    
14:00 T/R Switchs, Baluns, Traps, and Active Detuning Elements Xiaoyu Yang, Ph.D.
14:45 Volume Coil Types and Design Principles Cecil E. Hayes, Ph.D.
15:30 Array Coil Types and Design Principles Hiroyuki Fujita, Ph.D.
16:15 Break - Meet the Teachers     
16:30 Modeling the EM Wave Interaction with the Body and SAR  Tamer S. Ibrahim, Ph.D.
17:15 Transmit SENSE Coil Mark A. Griswold, Ph.D.
18:00 - 18:15 - Meet the Teachers