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Probing Structural and Dynamic Properties of Trafficking Subcellular Nanostructures by Spatiotemporal Fluctuation Spectroscopy
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Quantification of cell size using temporal diffusion spectroscopy.

Xiaoyu Jiang1,2, Hua Li1,3, Jingping Xie1,2

  • 1Institute of Imaging Science, Vanderbilt University, Nashville, Tennessee, USA.

Magnetic Resonance in Medicine
|April 8, 2015
PubMed
Summary
This summary is machine-generated.

This study introduces a hybrid oscillating gradient spin echo (OGSE) and pulsed gradient spin echo (PGSE) method to accurately measure cell sizes and intracellular volumes using temporal diffusion spectroscopy. This technique is suitable for practical magnetic resonance imaging applications.

Keywords:
MRIcell sizediffusiondiffusion timeoscillating gradientvolume fraction

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Area of Science:

  • Magnetic Resonance Imaging
  • Biophysical Techniques
  • Cellular Biology

Background:

  • Temporal diffusion spectroscopy characterizes tissue microstructure by assessing diffusion restrictions over varying times.
  • Previous oscillating gradient methods had limitations in accurately measuring cell sizes exceeding 10 μm.

Purpose of the Study:

  • To develop a novel approach for quantifying cell sizes and intracellular volume fractions.
  • To overcome limitations of existing methods for measuring larger cell sizes.

Main Methods:

  • Combined oscillating gradient spin echo (OGSE) and pulsed gradient spin echo (PGSE) acquisitions.
  • Utilized a single, relatively long diffusion time.
  • Employed a two-compartment model for analysis.

Main Results:

  • Accurate in vitro quantification of cell sizes (10–20 μm) and intracellular volume fractions.
  • Successful measurements across different cell densities.
  • Demonstrated efficacy before and after anticancer treatment.

Conclusions:

  • Hybrid OGSE-PGSE acquisitions effectively sample temporal diffusion spectra for wide-range cell size quantification.
  • The method utilizes low gradient strengths (<15 G/cm), indicating potential for clinical MR imaging translation.