Diffusion effects on the CPMG relaxation rate in a dipolar field |
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| Authors: | C.H. Ziener T. Kampf P.M. Jakob W.R. Bauer |
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| Affiliation: | 1. Julius-Maximilians-Universität Würzburg, Lehrstuhl für Experimentelle Physik 5, Am Hubland, 97074 Würzburg, Germany;2. Research Center Magnetic-Resonance-Bavaria, Am Hubland, 97074 Würzburg, Germany;3. Julius-Maximilians-Universität Würzburg, Medizinische Klinik und Poliklinik I, Oberdürrbacher Straße 6, 97080 Würzburg, Germany |
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| Abstract: | The diffusion in the magnetic dipolar field around a sphere is considered. The diffusion is restricted to the space between two concentric spheres, where the inner sphere is the source of the magnetic dipolar field. Analytical expressions for the CPMG transverse relaxation rate as well as the free induction decay and the spin echo time evolution are given in the Gaussian approximation. The influence of the inter-echo time is analyzed. The limiting cases of small and large inter-echo times as well as the short and long time behavior are evaluated. |
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