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Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
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Cardiovascular magnetic resonance imaging, or CMRI, is a non-invasive diagnostic test that employs a magnetic field and radiofrequency waves to create precise images of the heart and arteries. It provides comprehensive information about cardiac anatomy, function, perfusion, and tissue characterization without ionizing radiation.IndicationsCMRI diagnoses various heart conditions, including tissue damage from heart attacks, ischemic heart disease, myocarditis, aortic issues (tears, aneurysms,...
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Use of a Multi-compartment Dynamic Single Enzyme Phantom for Studies of Hyperpolarized Magnetic Resonance Agents
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Biomimetic phantom for cardiac diffusion MRI.

Irvin Teh1, Feng-Lei Zhou2,3, Penny L Hubbard Cristinacce2,4

  • 1Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, UK.

Journal of Magnetic Resonance Imaging : JMRI
|July 28, 2015
PubMed
Summary
This summary is machine-generated.

A novel biomimetic phantom accurately mimics cardiac diffusion properties, aiding the development of advanced diffusion MRI techniques for studying heart microstructure. This reduces the need for animal and patient studies.

Keywords:
biomimetic phantomcardiac MRIco-electrospinningdiffusion tensor imaging

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Area of Science:

  • Biomedical Engineering
  • Magnetic Resonance Imaging
  • Cardiovascular Research

Background:

  • Diffusion magnetic resonance imaging (MRI) is crucial for characterizing cardiac tissue microstructure.
  • Current phantoms lack the physiological relevance needed for cardiac diffusion MRI methods development.
  • There is a significant need for phantoms that accurately mimic cardiac diffusion properties.

Purpose of the Study:

  • To develop and validate a biomimetic phantom for simulating cardiac diffusion properties.
  • To create a tool for advancing diffusion MRI methods in cardiovascular research.
  • To provide a physiologically relevant phantom for cardiac microstructure analysis.

Main Methods:

  • A biomimetic phantom was engineered using co-electrospinning of hollow microfibers.
  • The phantom was subjected to diffusion tensor imaging at 9.4T over a 4-month period.
  • 3D fiber tracking was performed on the phantom and compared to ex vivo rat heart data.

Main Results:

  • The phantom demonstrated stable mean apparent diffusion coefficient and fractional anisotropy over 4 months.
  • Mean values were 7.53 ± 0.16 × 10(-4) mm(2)/s and 0.388 ± 0.007, respectively.
  • Fiber tracking results correlated with myocardial fiber and sheet-normal orientations.

Conclusions:

  • A biomimetic phantom simulating cardiac diffusion was successfully designed and constructed.
  • This phantom can accelerate the development and validation of cardiac diffusion MRI methods.
  • It offers potential to reduce animal/patient use and enhance quality control in cardiac MRI studies.