ISMRM25 - The Best of Two Worlds: Physics & Engineering II: Imaging

ISMRM & ISMRT Annual Meeting & Exhibition • 10-15 May 2025 • Honolulu, Hawai'i

The Best of Two Worlds: Physics & Engineering II: Imaging

Weekend Course

ORGANIZERS: Natalia Gudino, Shaoying Huang, Douglas Kelley, Johnes Obungoloch, Andrew Webb, Xiaoliang Zhang

Saturday, 10 May 2025

310 (Lili-u Theater)

13:00 - 17:00

Moderators: Gigi Galiana & Ehsan Kazemivalipour

Skill Level: Intermediate

Session Number: WE-14

No CME/CE Credit

Session Number: WE-14

Overview
Basics of NMR and MRI linking the physics principles with the engineering requirements/needs and across magnetic field strengths.
This second part follows Part 1 and will include 7 lectures, 1 meet the teachers session, and 1 discussion at the end. The session will be built as follows:
1- Basics of imaging: spatial encoding, k-space (cartesian trajectory), basic 2D & 3D SE & GRE sequences
2- Scan acceleration: non-cartesian trajectories, parallel imaging + respective reco
3- Gradient coil design: basic models, RF shield, self-shielded, thermal management, amplifiers
4- Concomitant field effects vs Eddy currents (and their correction)
5- Meet the teachers
6- RF coil arrays (design, RF amplifier characteristics)
7- Receiver chain
8- MR safety: magnetics & RF
9- Discussion

Target Audience
Physicists and Engineers.

Educational Objectives
As a result of attending this course, participants should be able to:
• Describe spatial encoding and how to navigate through k-space;
• Explain how to accelerate scans; and
• Describe the acquisition chain.

13:00		Basics of Imaging: Spatial Encoding, k-Space (Cartesian Trajectory), Basic 2D & 3D SE & GRE Sequences Laura Sacolick
13:30		Scan Acceleration: Non-Cartesian Trajectories, Parallel Imaging + Respective Reco View Presentation Video Yasuhiko Terada Impact: This lecture covers MRI acceleration via non-Cartesian sampling, parallel imaging, and advanced reconstructions like compressed sensing and deep learning. It highlights efficient k-space coverage, scan time reduction, and artifact correction for improved imaging efficiency.
14:00		Concomitant Field Effects vs Eddy Currents (& their Correction) View Presentation Video Matt Bernstein Impact: Concomitant fields and eddy currents are distinct effects, but they are both important because they affect resonant frequency and can cause image artifacts. This talk will focus on their origin and correction, while highlighting their similarities and differences.
14:30		RF Coil Arrays (Design, RF Amplifier Characteristics) View Presentation Video Nikolai Avdievich Impact: Use of RF coil arrays instead of a single coil is a major technique of improvement of the transmit performance and SNR. This presentation overviews most important steps of array designing including an array choice, choice of the elements, decoupling, interfacing, cable routing etc.
15:00		Break & Meet the Teachers
15:30		Receiver Chain Fraser Robb Impact: Advances in MRI receive chains have taken great strides since early MRI and we explore different designs.
16:00		MR Safety: Magnetics & RF View Presentation Video Yigitcan Eryaman Impact: Static magnetic fields exert force and torque on ferromagnetic objects. Rapidly changing magnetic fields generated by the gradient coils can cause nerve stimulation. RF fields can cause heating in the tissue. Safety limits ensure that patients are scanned safely under all conditions.
16:30		Gradient Coil Design: Methods, Cases & Applications Sebastian Littin