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Tissue-specific MR contrast agents.

Hanns-Joachim Weinmann1, Wolfgang Ebert, Bernd Misselwitz

  • 1Research Laboratories, Schering AG, Magnetic Resonance Imaging and X-Ray Research, Muellerstrasse 178, D-13342 Berlin, Germany. hansjoachim.weinmann@schering.de

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This review covers new trends in magnetic resonance imaging (MRI) contrast agents. Future agents will offer enhanced imaging for conditions like atherosclerosis and metastasis, improving cardiovascular MRI and diagnostic capabilities.

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Area of Science:

  • Medical Imaging
  • Radiochemistry
  • Biomedical Engineering

Background:

  • Small molecular weight gadolinium chelates are currently the standard for contrast-enhanced MRI.
  • These agents facilitate the assessment of physiological parameters like blood-brain barrier integrity and renal function.

Purpose of the Study:

  • To review recent advancements in contrast agent development for magnetic resonance imaging (MRI).
  • To highlight emerging trends and future directions in MRI contrast agent technology.

Main Methods:

  • Literature review of recent trends in contrast agent development.
  • Analysis of current and emerging applications of contrast agents in diagnostic imaging.

Main Results:

  • Development of liver-specific agents (gadolinium, manganese, iron) is ongoing.
  • Future agents include blood pool agents for cardiac MRI and contrast-enhanced lymphography.
  • Ultrasmall superparamagnetic iron oxides and gadolinium chelates show promise for detecting metastatic disease and atherosclerotic plaques.
  • Thrombus-specific agents are on the horizon, enhancing cardiovascular MRI.

Conclusions:

  • The future of cardiovascular MRI will significantly benefit from new paramagnetic and superparamagnetic contrast agents.
  • While specialized agents for tumors, pathology, or receptors are anticipated, they are unlikely for routine MRI within the next decade.