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Diffusion Imaging in the Rat Cervical Spinal Cord
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Diffusion processes modeling in magnetic resonance imaging.

Sergey Morozov1, Kristina Sergunova2, Alexey Petraikin2

  • 1Research and Practical Clinical Center of Diagnostics and Telemedicine Technologies, Department of Health Care of Moscow, 28-1, ul. Srednyaya Kalitnikovskaya, Moscow, 109029, Russia. morozov@npcmr.ru.

Insights Into Imaging
|April 30, 2020
PubMed
Summary
This summary is machine-generated.

A novel phantom with control substances allows for accurate apparent diffusion coefficient (ADC) measurements in diffusion-weighted imaging (DWI), aiding in neoplastic process evaluation and quality assurance.

Keywords:
Diffusion-weighted magnetic resonance imagingEmulsionImaging phantomMagnetic resonance imagingWater diffusion

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Area of Science:

  • Magnetic Resonance Imaging
  • Biomedical Engineering
  • Radiology

Background:

  • Diffusion-weighted imaging (DWI) is crucial for evaluating neoplastic processes.
  • Quantitative parameters and quality assurance in DWI require robust monitoring methods.
  • Understanding hindered and restricted diffusion models is key for accurate interpretation.

Purpose of the Study:

  • To propose a physical phantom for monitoring quantitative parameters in DWI.
  • To develop a tool for quality assurance in DWI measurements.
  • To simulate hindered and restricted diffusion for phantom validation.

Main Methods:

  • Utilized polyvinylpyrrolidone solutions to simulate hindered diffusion.
  • Created siloxane-based water-in-oil emulsions to mimic restricted diffusion.
  • Employed high T2 silicon oils and a 1.5T MRI scanner for phantom DWI acquisition.
  • Assessed phantom with various fat suppression techniques and whole-body DWI.

Main Results:

  • Developed a phantom with control substances yielding apparent diffusion coefficient (ADC) values from 2.29 to 0.28 mm²/s.
  • Simulated ADC values demonstrated relevance to mono-exponential equations with a 0.91% mean relative difference.
  • Phantom enabled assessment of ADC measurement accuracy and fat suppression effectiveness.

Conclusions:

  • The developed phantom accurately assesses ADC measurements and fat suppression efficacy.
  • Control substances serve as effective body markers for quality assurance in whole-body DWI.
  • This phantom enhances the reliability of DWI in neoplastic process evaluation.