Abstract
In this short note we consider a method of enhancing diffusion MRI data based on analytically deblurring the ensemble average propagator. Because of the Fourier relationship between the normalized signal and the propagator, this technique can be applied in a straightforward manner to a large class of models. In the case of diffusion tensor imaging, a commonly used ‘ad hoc’ \(\min\)-normalization sharpening method is shown to be closely related to this deblurring approach. The main goal of this manuscript is to give a formal description of the method for (generalized) diffusion tensor imaging and higher order apparent diffusion coefficient-based models. We also show how the method can be made adaptive to the data, and present the effect of our proposed enhancement on scalar maps and tractography output.
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- 1.
We assume a standard pulsed gradient spin echo sequence.
- 2.
This follows from Eq. (1) under some regularity conditions.
- 3.
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Acknowledgements
Tom Dela Haije gratefully acknowledges The Netherlands Organisation for Scientific Research (NWO) for financial support. Neda Sepasian and Tom Dela Haije are equal first authors.
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Dela Haije, T., Sepasian, N., Fuster, A., Florack, L. (2016). Adaptive Enhancement in Diffusion MRI Through Propagator Sharpening. In: Fuster, A., Ghosh, A., Kaden, E., Rathi, Y., Reisert, M. (eds) Computational Diffusion MRI. Mathematics and Visualization. Springer, Cham. https://doi.org/10.1007/978-3-319-28588-7_12
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