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Molecular Imaging and Biology

, Volume 18, Issue 2, pp 191–200 | Cite as

Dynamic Measurement of Tumor Vascular Permeability and Perfusion using a Hybrid System for Simultaneous Magnetic Resonance and Fluorescence Imaging

  • Wuwei Ren
  • Andreas Elmer
  • David Buehlmann
  • Mark-Aurel Augath
  • Divya Vats
  • Jorge Ripoll
  • Markus Rudin
Research Article

Abstract

Purpose

Assessing tumor vascular features including permeability and perfusion is essential for diagnostic and therapeutic purposes. The aim of this study was to compare fluorescence and magnetic resonance imaging (MRI)-based vascular readouts in subcutaneously implanted tumors in mice by simultaneous dynamic measurement of tracer uptake using a hybrid fluorescence molecular tomography (FMT)/MRI system.

Procedure

Vascular permeability was measured using a mixture of extravascular imaging agents, GdDOTA and the dye Cy5.5, and perfusion using a mixture of intravascular agents, Endorem and a fluorescent probe (Angiosense). Dynamic fluorescence reflectance imaging (dFRI) was integrated into the hybrid system for high temporal resolution.

Results

Excellent correspondence between uptake curves of Cy5.5/GdDOTA and Endorem/Angiosense has been found with correlation coefficients R > 0.98. The two modalities revealed good agreement regarding permeability coefficients and centers-of-gravity of the imaging agent distribution.

Conclusion

The FMT/dFRI protocol presented is able to accurately map physiological processes and poses an attractive alternative to MRI for characterizing tumor neoangiogenesis.

Key words

Fluorescence molecular tomography MRI Simultaneous hybrid measurements Tumor angiogenesis Vascular permeability Perfusion 

Notes

Acknowledgments

The authors acknowledge funding by the National Competence Center for Biomedical Imaging NCCBI (AE) and the European Frame Program FP7 (FMTXCT; MR). We are also grateful to Markus Küpfer (ETHZ) for excellent technical support.

Conflict of Interest

The authors declare no conflict of interest regarding this study.

Supplementary material

11307_2015_884_MOESM1_ESM.pdf (4.2 mb)
ESM 1 (PDF 4275 kb)

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Copyright information

© World Molecular Imaging Society 2015

Authors and Affiliations

  • Wuwei Ren
    • 1
  • Andreas Elmer
    • 1
  • David Buehlmann
    • 1
  • Mark-Aurel Augath
    • 1
  • Divya Vats
    • 1
  • Jorge Ripoll
    • 2
    • 3
  • Markus Rudin
    • 1
    • 4
    • 5
  1. 1.Institute for Biomedical EngineeringUniversity and ETH ZürichZürichSwitzerland
  2. 2.Department of BioengineeringUniversidad Carlos III of MadridMadridSpain
  3. 3.Medical Imaging LaboratoryHospital General Gregorio MarañónMadridSpain
  4. 4.Institute of Pharmacology and ToxicologyUniversity of ZürichZürichSwitzerland
  5. 5.Experimental and Clinical Imaging Technologies (EXCITE)ZürichSwitzerland

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