Volume-Selective Tissue Characterization by T1e Dispersion Measurements and T1e Dispersion Imaging

  • E. Rommel
  • R. Kimmich
Conference paper


The contrasts of biomedical NMR images are mainly governed by local differences in the relaxation times. Conventional imaging techniques are based on the time constants of spin-lattice relaxation (T1), and of transverse relaxation (T2). The spin-lattice relaxation rate, T1−1 is indicative for molecular motions in the region of the resonance frequency ω0 = γB0, where γ is the gyromagnetic ratio and B0 is the external magnetic flux density. The rate of the transverse relaxation, T2−1, on the other hand, reflects molecular fluctuations less than the frequency corresponding to the local fields which arise from the spin interactions. Therefore, T2 ist sensitive to the slow motions connected with the macromolecular constituents of tissue, for instance.


Relaxation Dispersion Conventional Imaging Technique Motional Narrowing Individual Spectral Line Macromolecular Constituent 
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Copyright information

© Springer-Verlag Berlin Heidelberg 1990

Authors and Affiliations

  • E. Rommel
    • 1
  • R. Kimmich
  1. 1.Sektion KernresonanzspektroskopieUniversitat UlmUlmGermany

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