ISMRM24 - Absolute Beginner's Guide to Susceptibility Imaging

Absolute Beginner's Guide to Susceptibility Imaging

Sunrise Course

ORGANIZERS: Sune Jespersen, Sila Kurugol, Shaihan Malik, Henrik Odéen, Yasuhiko Tachibana, Cristian Tejos, Richard Thompson

Thursday, 09 May 2024

Nicoll 2

07:00 - 08:00

Moderators: Beata Bachrata & Ferdinand Schweser

Skill Level: Basic

Session Number: S-Th-03

CME and CE Credit

Session Number: S-Th-03

Overview
This course will over 4 mornings give Absolute beginner’s guides to 4 commonly encountered topics of interest for a broad audience; 1) Diffusion imaging, 2) Fat-water separation, 3) fMRI, and 4) Susceptibility imaging. Both technical considerations and clinical applications will be discussed for each subject.

Target Audience
This course is designed for scientists and clinicians who are interested in starting clinical and research projects in any of the covered topics and would like to quickly get caught up on the basics.

Educational Objectives
As a result of attending this course, participants should be able to:
- Explain the acquisition and processing methods applicable for the covered topics;
- Discuss the pros and cons of each method;
- Identify different areas of applications for each method;
- Summarize the challenges of qualitative MRI in MSK imaging;
- Summarize the strengths and weaknesses of quantitative MRI in MSK imaging; and
- Explain the QIBA MSK initiative.

07:00		Qualitative Susceptibility Imaging View Presentation Video Kohsuke Kudo Keywords: Contrast mechanisms: Electromagnetic Tissue Properties, Neuro: Brain, Contrast mechanisms: Electromagnetic tissue properties Magnetic susceptibility is a physical property unique to each substance, affecting the resonance frequency and phase of surrounding protons. T2*-weighted gradient echo (GRE) images and susceptibility-weighted images (SWI) are commonly used in clinical imaging to qualitatively emphasize differences in magnetic susceptibilities, in contrast to quantitative susceptibility mapping (QSM). This presentation discusses the advantages and disadvantages of qualitative imaging compared to QSM, as well as clinical applications such as the detection of hemorrhage (including microbleeds, superficial siderosis, and macro hemorrhage) and the depiction of venous structures (including venous anomalies and ischemic strokes).
07:30		Quantitative Susceptibility Imaging View Presentation Video Sina Straub Keywords: Contrast mechanisms: Electromagnetic tissue properties This course gives an introduction to quantitative susceptibility mapping (QSM). Magnetic susceptibility is a measure of how much a material gets magnetized in an external magnetic field. QSM is ideally computed from multi-echo gradient echo data. Phase data need to be processed to remove phase wraps and to compute the local field from which the susceptibility distribution is calculated. The learning aims are: Learn what the contrast mechanisms for susceptibility imaging of biological tissue are, What data need to be acquired for QSM, Discuss important acquisition parameters, Understand basic steps for the calculation of QSM, Applications & Resources.