Details
| Original language | English |
|---|---|
| Pages (from-to) | 140-149 |
| Number of pages | 10 |
| Journal | Magnetic Resonance Letters |
| Volume | 3 |
| Issue number | 2 |
| Early online date | 11 Apr 2023 |
| Publication status | Published - May 2023 |
| Externally published | Yes |
Abstract
A recent study demonstrated that in small-scale prepolarized surface nuclear magnetic resonance (SNMR-PP) measurements with a footprint of a few square meters, customized PP switch-off ramps can serve as an efficient excitation mechanism, eliminating the requirement for a conventional oscillating excitation pulse. This approach enables the detection of short relaxation signals from the unsaturated soil zone and can, therefore, be used to directly provide soil moisture and pore geometry information. Because ultimately such small-scale SNMR-PP setups are intended for a mobile application, it is necessary to develop strategies that allow for speedy measurement progress and do not require noise cancellation protocols based on reference stations. Hence, we developed a new concentric figure-of-eight (cFOE) loop layout that combines the direction independence of a circular loop with the intrinsic noise cancellation properties of a classical FOE-loop. This approach significantly decreases the measurement time because suitable signal-to-noise ratios are reached much faster compared to a classical circular loop and will bring us one step further toward fast and non-invasive soil moisture mapping applications.
Keywords
- Loop layout, Noise cancellation, Prepolarization, Surface-NMR
ASJC Scopus subject areas
- Medicine(all)
- Radiology Nuclear Medicine and imaging
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In: Magnetic Resonance Letters, Vol. 3, No. 2, 05.2023, p. 140-149.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Advanced surface coil layout with intrinsic noise cancellation properties for surface-NMR applications
AU - Hiller, Thomas
AU - Costabel, Stephan
AU - Dlugosch, Raphael
AU - Splith, Tobias
AU - Müller-Petke, Mike
N1 - Publisher Copyright: © 2023 The Authors
PY - 2023/5
Y1 - 2023/5
N2 - A recent study demonstrated that in small-scale prepolarized surface nuclear magnetic resonance (SNMR-PP) measurements with a footprint of a few square meters, customized PP switch-off ramps can serve as an efficient excitation mechanism, eliminating the requirement for a conventional oscillating excitation pulse. This approach enables the detection of short relaxation signals from the unsaturated soil zone and can, therefore, be used to directly provide soil moisture and pore geometry information. Because ultimately such small-scale SNMR-PP setups are intended for a mobile application, it is necessary to develop strategies that allow for speedy measurement progress and do not require noise cancellation protocols based on reference stations. Hence, we developed a new concentric figure-of-eight (cFOE) loop layout that combines the direction independence of a circular loop with the intrinsic noise cancellation properties of a classical FOE-loop. This approach significantly decreases the measurement time because suitable signal-to-noise ratios are reached much faster compared to a classical circular loop and will bring us one step further toward fast and non-invasive soil moisture mapping applications.
AB - A recent study demonstrated that in small-scale prepolarized surface nuclear magnetic resonance (SNMR-PP) measurements with a footprint of a few square meters, customized PP switch-off ramps can serve as an efficient excitation mechanism, eliminating the requirement for a conventional oscillating excitation pulse. This approach enables the detection of short relaxation signals from the unsaturated soil zone and can, therefore, be used to directly provide soil moisture and pore geometry information. Because ultimately such small-scale SNMR-PP setups are intended for a mobile application, it is necessary to develop strategies that allow for speedy measurement progress and do not require noise cancellation protocols based on reference stations. Hence, we developed a new concentric figure-of-eight (cFOE) loop layout that combines the direction independence of a circular loop with the intrinsic noise cancellation properties of a classical FOE-loop. This approach significantly decreases the measurement time because suitable signal-to-noise ratios are reached much faster compared to a classical circular loop and will bring us one step further toward fast and non-invasive soil moisture mapping applications.
KW - Loop layout
KW - Noise cancellation
KW - Prepolarization
KW - Surface-NMR
UR - http://www.scopus.com/inward/record.url?scp=85152417775&partnerID=8YFLogxK
U2 - 10.1016/j.mrl.2023.03.008
DO - 10.1016/j.mrl.2023.03.008
M3 - Article
AN - SCOPUS:85152417775
VL - 3
SP - 140
EP - 149
JO - Magnetic Resonance Letters
JF - Magnetic Resonance Letters
SN - 2097-0048
IS - 2
ER -