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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
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.
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.
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.