Joint Annual Meeting ISMRM-ESMRMB • 16-21 June 2018 • Paris, France

Weekend Educational Course
RF Engineering: Coils
RF Engineering: Coils: Part 1
Weekend Course

ORGANIZERS: Gregor Adriany, Christoph Juchem, Mary McDougall, Greig Scott

Sunday, 17 June 2018
N04  08:00 - 09:30 Moderators:  Natalia Gudino, Michael Twieg

Skill Level: Intermediate

Session Number: WE-13A

Overview
Attendees will receive relevant session and talk recommendations from speakers. In this one-day course, the principles of RF coils used to detect and excite the MR signals will be discussed, beginning with the transmission lines that interconnect the coils to the MR system and extending to single-surface and volume coils and finally RF coil arrays for both transmit and receive. A discussion of the RF modeling tools used to analyze these coils and coil arrays and their interaction with the patient and the environment will lead into the interaction of RF fields with other objects in the MR environment.

Target Audience
This course is designed for MR technicians, scientists and engineers with an interest in understanding physical principles behind MR safety issues related to RF fields, and/or the construction, design or use of RF coils and RF coil arrays.

Educational Objectives
As a result of attending this course, participants should be able to:
-Describe the basic theory, design and construction of single and multi-tuned RF coils and their feed networks;
-Illustrate the principles of operation and basic applications of receive and transmit RF coil arrays; and
-Compare and contrast the major methods of RF modeling commonly in use and the relative advantages and disadvantages of each.



08:00
Basics of Transmission Lines & Power Transfer
Nicola De Zanche
This lecture covers the basic concepts of RF power transfer over transmission lines. Tools such as scattering parameters and the Smith chart are also discussed.

08:30
Volume & Surface Coils
Christoph Leussler
RF coils (antennas) for MRI are designed to generate a RF magnetic field inside the body. Large body volume coils are optimized for the generation of a homogeneous RF magnetic field. Local surface coils are designed to provide high signal to noise ratio. Different designs and related physical aspects are discussed.

09:00
Multi-Tuned Coils
Dennis Klomp
Ever wanted to build your own multi-tuned RF coil to enable metabolic imaging? This 30 minute session will start from scratch and ends with you capable to make the most advanced multi-tuned, transmit and receive coil array (in theory)...

09:30 
  Break & Meet the Teachers
 
RF Engineering: Coils: Part 2
Weekend Course

ORGANIZERS: Gregor Adriany, Christoph Juchem, Mary McDougall, Greig Scott

Sunday, 17 June 2018
N04  10:00 - 11:30 Moderators:  Natalia Gudino, Michael Twieg

Skill Level: Intermediate

Session Number: WE-13B

Overview
Attendees will receive relevant session and talk recommendations from speakers. In this one-day course, the principles of RF coils used to detect and excite the MR signals will be discussed, beginning with the transmission lines that interconnect the coils to the MR system and extending to single-surface and volume coils and finally RF coil arrays for both transmit and receive. A discussion of the RF modeling tools used to analyze these coils and coil arrays and their interaction with the patient and the environment will lead into the interaction of RF fields with other objects in the MR environment.

Target Audience
This course is designed for MR technicians, scientists and engineers with an interest in understanding physical principles behind MR safety issues related to RF fields, and/or the construction, design or use of RF coils and RF coil arrays.

Educational Objectives
As a result of attending this course, participants should be able to:
-Describe the basic theory, design and construction of single and multi-tuned RF coils and their feed networks;
-Illustrate the principles of operation and basic applications of receive and transmit RF coil arrays; and 
-Compare and contrast the major methods of RF modeling commonly in use and the relative advantages and disadvantages of each.



  RF Arrays
10:00
  Receive Arrays & Circuity
Peter Roemer
Fundamental limits of Signal-to-Noise(SNR) ratio exist that cannot be exceeded even with an idealized noiseless receiver coil.  These limits can be approached in certain circumstances with proper coil design.  The objective is to provide the audience with an understanding of these limits and their relationship to practical aspects of coil design. In turn this will help guide the choice of coil element size, array extent, and total coil count for imaging a specific anatomical location.

10:30
Transmit Arrays & Circuitry for UHF Body Imaging
Stephan Orzada
As the main magnetic field strength increases, the corresponding RF wavelength is shortened. This leads to pronounced wave effects in the transmit field, causing inhomogeneous excitation. Multi-channel arrays provide additional degrees of freedom to mitigate such effects and to manipulate (or to tailor) RF transmission. Roughly these can be divided in 3 types, namely local arrays, remote circumferential arrays and travelling wave arrays. Examples of these arrays are presented in this educational talk.

11:00
  RF Modelling
Joseph Rispoli
Radiofrequency (RF) modelling offers an efficient means to characterize the design and performance of RF coils. Simulations are particularly important for establishing MRI scan parameters to ensure safety compliance. This talk provides an overview of several numerical methods that may be employed to model the electrodynamics of RF coils; emphasis is placed on the finite-difference time-domain (FDTD) method and considerations for achieving accurate simulation and validation.

11:30
  Lunch & Meet the Teachers
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