On Measuring the Pore Distribution Function and the Occurrence of Signal Peaks When Utilizing Long Diffusion Gradients
Christoph Martin Stuprich1, Tristan Anselm Kuder2, Bernhard Hensel3, Michael Uder1, and Frederik Bernd Laun1
1Radiology, University Hospital Erlangen, Friedrich Alexander University Erlangen, Erlangen, Germany, 2German Cancer Research Center(DKFZ) Heidelberg, Heidelberg, Germany, 3Friedrich Alexander University Erlangen, Erlangen, Germany
In Diffusion MR, short gradient pulses are often ascribed to generate oscillating signal curves. These characteristic oscillations or “peaks” appear if a certain characteristic length-scale in the underlying tissue is present. Mitra and Halperin mention the possibility of “Bragg Peaks” when using long gradient pulses. In this work we explicitly show and interpret the occurrence of such signal peaks under application of long gradient pulses in theory and simulation.
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