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Magnetic barcode imaging for contrast agents.

Andy H Hung1, Laura M Lilley1, Fengqin Hu2

  • 1Department of Chemistry, Molecular Biosciences, Neurobiology, Biomedical Engineering, and Radiology, Northwestern University, Evanston, Illinois, USA.

Magnetic Resonance in Medicine
|April 11, 2016
PubMed
Summary
This summary is machine-generated.

Magnetic barcode imaging (MBI) is a new approach that identifies and quantifies MRI contrast agents. This method uses intrinsic agent properties to provide accurate concentration, identity, and functional state information.

Keywords:
contrast agentmachine learningmagnetic resonance imagingmolecular imaging

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Area of Science:

  • Magnetic Resonance Imaging (MRI)
  • Biomedical Imaging
  • Contrast Agent Development

Background:

  • Current MRI contrast agent interpretation faces limitations in quantitation and multiplexing.
  • Distinguishing and quantifying multiple contrast agents simultaneously remains a challenge.

Purpose of the Study:

  • To introduce Magnetic Barcode Imaging (MBI), a novel MRI approach.
  • To demonstrate MBI's ability to identify and quantify contrast agents based on intrinsic properties.

Main Methods:

  • Generated T1, T2, T2*, and quantitative susceptibility maps of contrast agents in phantoms.
  • Utilized a machine learning algorithm trained on these parameter maps to recognize contrast agents.
  • Developed MBI to output quantitative maps of contrast agent concentration, identity, and functional state.

Main Results:

  • MBI enabled quantitative interpretation of signal intensities, removing background noise.
  • The approach successfully allowed for contrast agent multiplexing.
  • MBI unambiguously detected the activation and binding states of bioresponsive and targeted contrast agents.

Conclusions:

  • MBI offers a powerful solution for overcoming limitations in MRI contrast agent interpretation and quantitation.
  • This technique has the potential to significantly advance the use of multiplexed MRI probes.
  • MBI provides unambiguous detection and quantification of contrast agent states.