Ultra-low frequency EPR using longitudinal detection and fictitious-field modulation.

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Abstrakt

Tytuł:: Ultra-low frequency EPR using longitudinal detection and fictitious-field modulation.
Autorzy:: Tang X; Center for Magnetic Resonance Research and Department of Radiology, University of Minnesota, 2021 6(th) Street SE, Minneapolis, MN 55455, USA.
Suddarth S; Center for Magnetic Resonance Research and Department of Radiology, University of Minnesota, 2021 6(th) Street SE, Minneapolis, MN 55455, USA.
Qian G; Center for Magnetic Resonance Research and Department of Radiology, University of Minnesota, 2021 6(th) Street SE, Minneapolis, MN 55455, USA.
Garwood M; Center for Magnetic Resonance Research and Department of Radiology, University of Minnesota, 2021 6(th) Street SE, Minneapolis, MN 55455, USA. Electronic address: .
Źródło:: Journal of magnetic resonance (San Diego, Calif. : 1997) [J Magn Reson] 2020 Dec; Vol. 321, pp. 106855. Date of Electronic Publication: 2020 Oct 22.
Typ publikacji:: Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't
Język:: English
Imprint Name(s):: Publication: 2004- : San Diego : Elsevier
Original Publication: San Diego : Academic Press, c1997-2004.
MeSH Terms:: Dextrans/*chemistry
Electron Spin Resonance Spectroscopy/*methods
Magnetite Nanoparticles/*chemistry
Algorithms ; Electron Spin Resonance Spectroscopy/instrumentation ; Equipment Design ; Radio Waves ; Signal Processing, Computer-Assisted
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Grant Information:: U01 EB025153 United States EB NIBIB NIH HHS
Contributed Indexing:: Keywords: Electron paramagnetic resonance; Fictitious field; Iron-oxide nanoparticles; Longitudinal detection; Simultaneous transmit and receive; Spectroscopy
Substance Nomenclature:: 0 (Dextrans)
0 (Magnetite Nanoparticles)
G6N3J05W84 (ferumoxides)
Entry Date(s):: Date Created: 20201113 Date Completed: 20211101 Latest Revision: 20211203
Update Code:: 20240105
PubMed Central ID:: PMC7718292
DOI:: 10.1016/j.jmr.2020.106855
PMID:: 33186882
: Czasopismo naukowe

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When viewed in a rotating frame of reference, a transverse-plane radiofrequency (RF) field manifests as a longitudinal field component called the fictitious field. By modulating the RF field and thus the fictitious field, detectable longitudinal magnetization patterns have previously been shown to be measurable. By combining fictitious-field modulation and longitudinal detection, here we demonstrate EPR spectroscopy and one-dimensional imaging in a custom-built longitudinal detection system operating at an ultra-low frequency (24 MHz) for detecting electron spins with short (~nanoseconds) relaxation times. Simultaneous transmit and receive with low transmitter leakage level (~80 dB isolation) is also demonstrated.
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 © 2020 Elsevier Inc. All rights reserved.)

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