Amplitude modulation and relaxation due to diffusion in NMR experiments with a rotating sample Academic Article uri icon

Overview

MeSH Major

  • Head and Neck Neoplasms
  • Neoplasm Staging
  • Nomograms
  • Sarcoma

abstract

  • The simultaneous effects of diffusion and coherent averaging by magic angle sample spinning (MASS) are investigated both theoretically and experimentally for spins diffusing in a spatially varying susceptibility field. The diffusion introduces a periodic modulation and a relaxation of the magnetization amplitude. The attenuation exponent for the nth echo at an early time is given by D0γ2g2πn/(4ωr3), where ωr is the rotor frequency, D0 the diffusion coefficient, γ is the gyromagnetic factor, and a factor g2 which is related to, but different from, the volume average of the gradient squared. © 2000 Elsevier Science B.V.

publication date

  • December 22, 2000

Research

keywords

  • Academic Article

Additional Document Info

start page

  • 344

end page

  • 350

volume

  • 332

number

  • 3-4