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Related Concept Videos

Magnetic Resonance Imaging01:24

Magnetic Resonance Imaging

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...
Applications Of NMR In Biology01:25

Applications Of NMR In Biology

Nuclear magnetic resonance (NMR) spectroscopy is a very valuable analytical technique for researchers. It has been used for more than 50 years as an analytical tool. F. Bloch and E. Purcell formulated NMR in 1946 and won the 1952 Nobel Prize in Physics  for their work. Biological macromolecules such as proteins, nucleic acids, lipids, and organic molecules including pharmaceutical compounds, can be studied using this versatile tool that exploits the magnetic properties of certain nuclei.
The...

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Registered Bioimaging of Nanomaterials for Diagnostic and Therapeutic Monitoring
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Published on: December 9, 2010

Nanoformulations for molecular MRI.

Chuqiao Tu1, Angelique Y Louie

  • 1Department of Biomedical Engineering, University of California at Davis, Davis, CA, USA. chqtu@ucdavis.edu.

Wiley Interdisciplinary Reviews. Nanomedicine and Nanobiotechnology
|April 11, 2012
PubMed
Summary
This summary is machine-generated.

Nanoscale contrast agents significantly enhance magnetic resonance imaging (MRI) sensitivity for molecular detection. This review covers iron oxide, gadolinium, and essential metal ion nanoparticles for advanced medical imaging.

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Area of Science:

  • Biomedical Engineering
  • Nanotechnology
  • Medical Imaging

Background:

  • Magnetic resonance imaging (MRI) traditionally operates at a macroscopic level.
  • Nanoscale contrast agents offer orders-of-magnitude improvements in MRI detection sensitivity.
  • This enables the observation of unique molecular signatures previously undetectable.

Purpose of the Study:

  • To review and discuss three types of nanoparticulate contrast agents for MRI.
  • To compare their advantages and disadvantages for medical imaging applications.
  • To highlight their potential in advancing diagnostic capabilities.

Main Methods:

  • Description of iron oxide nanoparticles (IONPs) as contrast agents.
  • Discussion of gadolinium-based nanoparticles (GdNPs) for MRI.
  • Overview of nanoformulations containing bio-essential metal ions (Mn, Co, Ni, Cu).

Main Results:

  • IONPs offer strong magnetic properties and have clinical applications.
  • GdNPs provide excellent relaxivity but face safety considerations.
  • Essential metal ion nanoformulations present novel avenues with varying properties.
  • Some agents are clinically approved, while others are under development.

Conclusions:

  • Nanoscale contrast agents are crucial for enhancing MRI sensitivity and molecular imaging.
  • Each nanoformulation type (IONPs, GdNPs, essential metal ions) presents unique benefits and drawbacks.
  • Continued development of these agents promises to revolutionize medical diagnostics.