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Easy Measurement of Diffusion Coefficients of EGFP-tagged Plasma Membrane Proteins Using k-Space Image Correlation Spectroscopy
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Double-pulsed diffusional kurtosis imaging.

Jens H Jensen, Edward S Hui, Joseph A Helpern

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    |March 14, 2014
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    Summary
    This summary is machine-generated.

    Double-pulsed field gradient diffusion MRI extends Diffusional Kurtosis Imaging (DKI). This new Double-pulsed DKI (DP-DKI) method captures unique information from diffusion displacement probability density functions for advanced analysis.

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    Area of Science:

    • Magnetic Resonance Imaging
    • Biophysics
    • Neuroimaging

    Background:

    • Diffusional kurtosis imaging (DKI) provides insights into non-Gaussian water diffusion.
    • Conventional DKI utilizes single-pulsed field gradients (s-PFG).
    • Limitations exist in s-PFG methods for capturing complex diffusion dynamics.

    Purpose of the Study:

    • To extend Diffusional Kurtosis Imaging (DKI) to double-pulsed-field-gradient (d-PFG) diffusion MRI sequences.
    • To develop a practical framework for acquiring and analyzing d-PFG data.
    • To interpret novel d-PFG effects using a six-dimensional (6D) diffusion displacement probability density function (dPDF).

    Main Methods:

    • Implementation of double-pulsed-field-gradient (d-PFG) diffusion MRI sequences.
    • Acquisition and analysis of d-PFG data.
    • Development of Double-pulsed DKI (DP-DKI) by interpreting d-PFG effects in a 6D kurtosis framework.

    Main Results:

    • A practical approach for d-PFG data acquisition and analysis is established.
    • Leading d-PFG effects are interpreted via 6D kurtosis of the dPDF.
    • A compact signal magnitude expression is derived, enabling novel acquisition and analysis methods.
    • DP-DKI was successfully demonstrated on in vivo mouse brain data acquired at 7 T.

    Conclusions:

    • Double-pulsed DKI (DP-DKI) effectively extends DKI to d-PFG sequences.
    • The 6D kurtosis framework provides a comprehensive understanding of d-PFG information.
    • DP-DKI offers novel avenues for diffusion MRI data acquisition and analysis, particularly in neuroimaging.