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Surface Nuclear Magnetic Resonance Imaging of Large Systems

Peter B. Weichman, Eugene M. Lavely, and Michael H. Ritzwoller
Phys. Rev. Lett. 82, 4102 – Published 17 May 1999
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Abstract

The general theory of surface NMR imaging of large electromagnetically active systems is considered, motivated by geophysical applications. A general imaging equation is derived for the NMR voltage response, valid for arbitrary transmitter and receiver loop geometry and arbitrary conductivity structure of the sample. When the conductivity grows to the point where the electromagnetic skin depth becomes comparable to the sample size, significant diffusive retardation effects occur that strongly affect the signal. Accounting for these now allows more accurate imaging than previously possible. It is shown that the time constant T1 may in principle be inferred directly from the diffusive tail of the signal.

  • Received 17 December 1998

DOI:https://doi.org/10.1103/PhysRevLett.82.4102

©1999 American Physical Society

Authors & Affiliations

Peter B. Weichman1, Eugene M. Lavely1, and Michael H. Ritzwoller2

  • 1Blackhawk Geometrics, Suite B, 301 Commercial Road, Golden, Colorado 80401
  • 2Department of Physics, University of Colorado at Boulder, Boulder, Colorado 80309-0390

See Also

Dowsing with Magnetic Resonance

Phys. Rev. Focus 3, 27 (1999)

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Issue

Vol. 82, Iss. 20 — 17 May 1999

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