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Autoperfused balloon catheter for intravascular MR imaging
H H Quick1, M E Ladd, P R Hilfiker
1Department of Diagnostic Radiology, University Hospital Zürich, Switzerland.
Journal of Magnetic Resonance Imaging : JMRI
|April 9, 1999
Summary
A new intravascular magnetic resonance (MR) imaging catheter enables high-resolution vessel wall imaging. This autoperfusion catheter maintains blood flow during imaging, reducing artifacts for clearer plaque visualization.
Area of Science:
- Biomedical Engineering
- Medical Imaging
- Cardiovascular Research
Background:
- Intravascular imaging is crucial for diagnosing vessel wall diseases.
- Traditional methods face challenges with blood flow and motion artifacts.
- High-resolution imaging of atherosclerotic plaque is needed for effective treatment.
Purpose of the Study:
- To develop and evaluate a novel intravascular magnetic resonance (MR) imaging catheter.
- To enable high-resolution imaging of vessel walls with maintained blood perfusion.
- To assess the impact of the autoperfusion design on image quality.
Main Methods:
- Designed an autoperfusion balloon catheter with a radiofrequency coil.
- Blood perfusion rate was experimentally determined relative to perfusion pressure.
- Evaluated the catheter in vitro using human femoral arteries and in vivo in pig carotid arteries.
Main Results:
- The autoperfusion catheter successfully maintained blood perfusion during balloon inflation.
- High-resolution intravascular MR images were acquired without significant flow or motion artifacts.
- Image quality remained unaffected by pulsatility during perfusion.
Conclusions:
- The autoperfused intravascular catheter is a significant advancement for high-resolution imaging.
- This technology facilitates clearer visualization of atherosclerotic plaque in critical arteries.
- It represents a key step towards improved diagnosis and management of vascular diseases.