ISMRM25 - Why Didn't My RF Pulse Work?

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

Why Didn't My RF Pulse Work?

Sunrise Course

ORGANIZERS: Natalia Gudino, Shaoying Huang, Douglas Kelley, Andrew Webb

Wednesday, 14 May 2025

311

07:00 - 08:00

Moderators: James Bankson & Adam Kerr

Skill Level: Intermediate

Session Number: S-W-05

No CME/CE Credit

Session Number: S-W-05

Overview
Introducing a new RF pulse or optimizing an old one for a new application requires understanding not just how the pulse should work but how the system hardware can affect the performance of the pulse. Building on the weekend Physics and Engineering courses, this session will dive into RF pulses and their misbehavior.

Target Audience
Scientists and engineers wishing to develop RF pulses for particular applications

Educational Objectives
As a result of attending this course, participants should be able to:
• Describe and understand different classes of RF pulses and their key design parameters;
• Describe and understand how RF pulses are generated and how their performance can be limited by system imperfections; and
• Describe and understand methods for B1 calibration and mapping, slice profile measurements, and how to diagnose and correct performance problems.

07:00		RF Pulse Types & Simulation View Presentation Video Paul Harvey Impact: RF pulses are vital in MRI for signal conditioning, localization, and efficient data acquisition. This lecture covers the history and evolution of slice-selective RF pulses, exploring various types, with simulations and coded examples demonstrating their properties and optimization.
07:20		Exploring Innovations in RF Transmit Chains View Presentation Video Ergin Atalar Impact: The lecture will cover the components of the RF transmit chain in detail, while also exploring innovative advancements.
07:40		Gradient & RF Modulation: Multidimensional and Spectral-Spatial Pulses Peder Larson Impact: Multidimensional RF pulses are explained through the excitation k-space perspective, with examples in 2D and spectral-spatial RF pulse design.