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Related Experiment Videos

Hafnium-Based Contrast Agents for X-ray Computed Tomography.

Markus Berger1, Marcus Bauser1, Thomas Frenzel1

  • 1Drug Discovery, Pharmaceuticals, Bayer AG , 13342 Berlin, Germany.

Inorganic Chemistry
|April 22, 2017
PubMed
Summary

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New heavy-metal contrast agents offer superior X-ray absorption for computed tomography (CT) imaging. Researchers developed a stable, soluble hafnium complex, BAY-576, demonstrating excellent contrast enhancement in CT angiography studies.

Area of Science:

  • Radiology
  • Materials Science
  • Medicinal Chemistry

Background:

  • Current iodinated contrast agents (CAs) for X-ray computed tomography (CT) have limitations in X-ray absorption.
  • Heavy-metal-based contrast agents offer potential for enhanced X-ray attenuation.
  • Development of stable, water-soluble, and effective heavy-metal CAs is crucial for advanced medical imaging.

Purpose of the Study:

  • To discover and optimize novel heavy-metal-based contrast agents for X-ray CT.
  • To synthesize and characterize lanthanide and hafnium azainositol complexes.
  • To evaluate the performance of a lead candidate, BAY-576, in vivo.

Main Methods:

  • Synthesis and characterization of novel lanthanide and hafnium azainositol complexes.
  • Optimization of complexes for high water solubility and stability.

Related Experiment Videos

  • In vivo evaluation of the lead compound (BAY-576) using CT angiography in a rabbit model.

    • Main Results:

    • Successful synthesis of new lanthanide and hafnium azainositol complexes.
    • Identification of BAY-576, an uncharged, asymmetrically substituted hafnium complex with 3:2 stoichiometry.
    • BAY-576 demonstrated superior signal contrast enhancement in rabbit CT angiography, indicating excellent performance.

    Conclusions:

    • Asymmetrically substituted hafnium complexes represent a promising class of heavy-metal contrast agents.
    • BAY-576 exhibits favorable properties including high water solubility and stability for CT imaging.
    • The developed hafnium CA shows potential for improved diagnostic capabilities in CT angiography.