1. UTE-SPECIAL for3D localization at an echo time of 4 ms on a clinical 3 T scanner.
- Author
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Landheer K, Noeske R, Garwood M, and Juchem C
- Subjects
- Adult, Artifacts, Computer Simulation, Healthy Volunteers, Humans, Image Processing, Computer-Assisted, Imaging, Three-Dimensional, Macromolecular Substances, Male, Parietal Lobe chemistry, Parietal Lobe diagnostic imaging, Phantoms, Imaging, Reproducibility of Results, Magnetic Resonance Imaging instrumentation, Magnetic Resonance Imaging methods, Magnetic Resonance Spectroscopy instrumentation, Magnetic Resonance Spectroscopy methods
- Abstract
Reducing the echo time of magnetic resonance spectroscopy experiments is appealing because it increases the available signal and reduces J-evolution of coupled metabolites. In this manuscript a novel sequence, referred to as Ultrashort echo TimE, SPin ECho, full Intensity Acquired Localized (UTE-SPECIAL), is described which is able to achieve ultrashort echo times (4 ms) on a standard clinical 3 T MR system while recovering the entirety of the available magnetization. UTE-SPECIAL obtains full 3D spatial localization through a 2D adiabatic inversion pulse which is cycled "on" and "off" every other repetition, in combination with a slice-selective excitation pulse. In addition to an ultrashort echo time, UTE-SPECIAL has negligible chemical shift displacement artefact and, because it uses no slice-selective refocusing pulse, has no signal cancellation at the borders for J-coupled metabolites. Spectra with an ultrashort echo time of 4 ms are demonstrated in vivo at 3 T, as well as J-resolved spectra obtained in a phantom and a healthy volunteer., Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2019 Elsevier Inc. All rights reserved.)
- Published
- 2020
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