No Time to Wait! Increasing the Value of MRI with Zero Echo Time
Member-Initiated Symposium
Wednesday, 11 May 2022
ICC Capital Suite 14-16
16:45 - 18:45
Session Number: MIS-09
Emil Ljungberg, and Tobias Wood.
Overview
Zero Echo Time (ZTE) is an old MRI method that has seen a renaissance over the last years. An effective echo time of 0 is achieved by acquiring the FID after hard pulse excitation. ZTE MRI offers numerous unique advantages over conventional methods which could offer new opportunities for research studies and clinical practice:
• Sensitivity to tissues with short T2 due to the effective TE=0. This enables CT-like imaging of bone.
• Reduced distortions in air-tissue interfaces, again from effective TE=0. This enables high-quality lung imaging for instance.
• A new silent acquisition from the radial out sampling where k-space lines can be arranged to produce minimal gradient switching.
However, ZTE MRI also presents several unique technical and practical difficulties which need to be considered:
• Non-cartesian reconstruction methods are challenging for large 3D radial out datasets.
• Hardware constraints make it difficult to acquire the full FID and points in the beginning are missed, resulting in a dead-time gap that needs to be filled.
• Visibility of signal from coil housing and padding can wrap into the image if not encoded.
• Lack of echo generations makes it difficult to produce contrasts other than T1 or PD, but not impossible.
Through this Member Initiated Symposium, we want to highlight the untapped potential of ZTE MRI for clinical and research applications and explore the unique difficulties that arise in ZTE.
Target Audience
MR physics researchers and clinicians interested in novel MRI methods
Educational Objectives
As a result of attending this course, participants should be able to:
Explain the mechanism of ZTE imaging|Highlight the unique advantages of ZTE|Give examples of how to resolve unique difficulties in ZTE
16:45
Fundamentals & History of ZTE
Video Unavailable
Peder Larson
University of California, San Francisco, CA, United States
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.
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