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Related Experiment Videos

MR imaging-guided vascular procedures using CO2 as a contrast agent.

Frank K Wacker1, Robbert M Maes, Jack A Jesberger

  • 1Department of Radiology, University Hospitals of Cleveland, Case Western Reserve University, 11100 Euclid Ave., Cleveland, OH 44106, USA. wackerfrank@web.de

AJR. American Journal of Roentgenology
|July 24, 2003
PubMed
Summary

Carbon dioxide (CO2) can be used as a black blood contrast agent in MRI-guided vascular procedures. This method enhances vessel visibility and confirms blood flow, aiding in intravascular interventions.

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Area of Science:

  • Medical Imaging
  • Interventional Radiology
  • Cardiovascular Research

Background:

  • Magnetic Resonance (MR) imaging is crucial for guiding vascular procedures.
  • Developing effective contrast agents is essential for improving visualization during these interventions.
  • Black blood contrast agents can enhance the delineation of vessels.

Purpose of the Study:

  • To evaluate carbon dioxide (CO2) as a black blood contrast agent for MR imaging-guided vascular interventions.
  • To assess the feasibility of using CO2 in an animal model for real-time imaging.

Main Methods:

  • CO2 was injected intraarterially into the aorta and renal arteries of anesthetized pigs.
  • Real-time MR images were acquired using a steady-state free precession sequence during CO2 injections.

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Main Results:

  • CO2 injections effectively replaced bright blood in the aorta and renal arteries, causing significant signal loss.
  • CO2 improved vessel conspicuity, particularly in peripheral vessels.
  • The technique allowed for confirmation of blood flow distal to the catheter tip.

Conclusions:

  • Carbon dioxide serves as an effective black blood contrast agent in MR imaging.
  • Combining CO2 with bright blood MR sequences enhances vessel conspicuity and provides real-time flow information.
  • This CO2-based MR imaging technique shows promise for facilitating MR imaging-guided intravascular procedures.