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Magnetic Resonance Imaging01:24

Magnetic Resonance Imaging

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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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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.
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Proteomics01:33

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A proteome is the entire set of proteins that a cell type produces. We can study proteomes using the knowledge of genomes because genes code for mRNAs, and the mRNAs encode proteins. Although mRNA analysis is a step in the right direction, not all mRNAs are translated into proteins.
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Insensitive Nuclei Enhanced by Polarization Transfer (INEPT) is an advanced Nuclear Magnetic Resonance (NMR) technique specifically designed to detect and enhance the signals of low-abundance nuclei, such as carbon-13 and nitrogen-15, in small molecules. The fundamental principle behind INEPT is the transfer of polarization from a more abundant and highly polarizable nucleus, typically hydrogen-1, to the low-abundance nucleus of interest. This process effectively boosts the NMR signal of the...
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Related Experiment Video

Updated: Jul 6, 2025

MR Molecular Imaging of Prostate Cancer with a Small Molecular CLT1 Peptide Targeted Contrast Agent
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Protein MRI Contrast Agents as an Effective Approach for Precision Molecular Imaging.

Dongjun Li1, Michael Kirberger, Jingjuan Qiao

  • 1From the Center for Diagnostics and Therapeutics, Advanced Translational Imaging Facility, Department of Chemistry, Georgia State University, Atlanta, GA (D.L., M.K., J.Q., Z.G., S.X., P.F., J.J., S.T., M.S., O.I., K.H., J.J.Y.); and InLighta BioSciences, LLC, Marietta, GA (Y.X., J.J.Y).

Investigative Radiology
|January 5, 2024
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Summary

Researchers developed advanced protein-targeted MRI contrast agents (ProCAs) that significantly enhance imaging for early disease detection. These novel agents offer improved relaxivity and biomarker targeting, paving the way for precision diagnostics in cancer and other chronic diseases.

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Area of Science:

  • Biomedical Imaging
  • Molecular Imaging
  • Contrast Agent Development

Background:

  • Magnetic Resonance Imaging (MRI) is crucial for disease characterization but faces challenges in precise molecular imaging.
  • Current contrast agents struggle with balancing metal-binding affinity and relaxivity for quantitative biomarker detection.
  • Overcoming these limitations is key for early disease detection, staging, and treatment monitoring.

Conclusions:

  • Protein-targeted MRI contrast agents (ProCAs) offer superior performance for precision molecular imaging.
  • ProCA32.collagen enabled early detection of liver metastasis and fibrosis in vivo.
  • These ProCAs hold significant translational potential for preclinical and clinical precision diagnosis and treatment.