ISMRM 24th Annual Meeting & Exhibition • 07-13 May 2016 • Singapore

Educational Session: Advances in Pulse Sequences for Body MRI

Skill Level: Intermediate

Organizers: Ivan Pedrosa, M.D., Lorenzo Mannelli, M.D., Ph.D., Scott B. Reeder, M.D., Ph.D. & Edwin J.R. van Beek, M.D., Ph.D., M.Ed., FRCR

Tuesday 10 May 2016

This two-hour course focuses on emerging techniques for evaluation of disease in the body. A comprehensive review of new technical developments for torso imaging will be presented with emphasis on emerging quantitative susceptibility mapping techniques. Further, an update on advances in time resolved MRI/MRA, diffusion weighted imaging, and parallel imaging will be presented.

Target Audience
This course is aimed at radiologists, imaging scientists and MR technologists who wish to review emerging and recent advances in MRI techniques for body MRI, and their implementation into routine clinical practice.

Educational Objectives
Upon completion of this course, participants should be able to:

  • Describe the basic principles of quantitative susceptibility mapping;
  • Convey the utility of new motion-insensitive, high-temporal resolution acquisition for dynamic contrast enhanced imaging of the abdomen/pelvis;
  • Implement new developments in DWI into clinical body MRI protocols; and
  • Illustrate the impact of new hardware development, coil design, and reconstruction algorithms in highly accelerated MRI acquisitions of the body.

Moderators: Ananth Madhuranthakam, Shreyas Vasanwala
Quantitative Susceptibility Mapping in the Body
Samir D. Sharma1
1University of Wisconsin - Madison
Quantitative Susceptibility Mapping (QSM) is an emerging technique for measuring the magnetic susceptibility of tissue throughout the body. Within human tissue, the presence of certain biomaterials or pathologies can causes a large change in the magnetic susceptibility of the tissue. Knowledge of the magnetic susceptibility of the particular tissue may be useful in characterizing these conditions.

Dynamic Contrast Enhanced MRI / MRA
Shreyas Vasanawala
Dynamic contrast-enhanced imaging is a critical component of body MR exams. This lecture will review hardware requirements, and in particular considerations for optimization at 3T.  Further, differences in contrast agents and the approach to contrast-enhanced dynamic imaging will be covered, along with bolus injection and timing considerations.   Additionally, pulse sequence parameter selection, sampling techniques, fat suppression methods, and view-sharing approaches will be reviewed.

Acquisition and Modeling Optimization for Quantitative Body DWI Applications
Julien Sénégas1
1Philips Research Laboratories, Hamburg, Germany
Signal decay in diffusion weighted imaging experiments is governed by different effects such as diffusion, perfusion, and restricted diffusion whose influence varies with the b-values. As a result, more complex models than the popular mono-exponential model have been investigated to fit the measured data and compute diffusion parameters, such as the Intravoxel Incoherent Model (IVIM) and the kurtosis model. The selection of the b-values for the image acquisition has a strong influence on the accuracy and precision of the estimated diffusion parameters. Strategies to optimize the acquisition for clinical routine depending on the tissue properties and the selected model will be presented.

Update on Parallel Imaging & Body MRI
Katherine Wright
This presentation will explore parallel imaging methods and how they can be used to accelerate MR image acquisition. Potential artifacts and specific considerations for applying parallel imaging techniques to body MRI will also be discussed. In addition to reviewing parallel imaging techniques, clinical applications of parallel imaging will also be explored. Importantly, recent advances in parallel imaging methodology that could benefit body MRI protocols will be reviewed.

Adjournment & Meet the Teachers

The International Society for Magnetic Resonance in Medicine is accredited by the Accreditation Council for
Continuing Medical Education to provide continuing medical education for physicians.