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Real-time projection MR angiography: feasibility study
J M Serfaty1, E Atalar, J Declerck
1Departments of Radiology and Biomedical Engineering, Biomedical Engineering, Division of Cardiology, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
Radiology
|September 30, 2000
Summary
Magnetic resonance (MR) imaging combined with gadopentetate dimeglumine enables real-time arterial imaging. This technique successfully visualized blood flow dynamics in rabbit aortas and canine coronary arteries, proving its feasibility for arterial fluoroscopy.
Area of Science:
- Medical Imaging
- Radiology
- Cardiovascular Imaging
Background:
- Traditional angiography involves ionizing radiation.
- Real-time imaging of arterial blood flow dynamics is crucial for diagnosis.
Purpose of the Study:
- To evaluate the feasibility of using magnetic resonance (MR) techniques for real-time arterial fluoroscopy.
- To assess the visualization of arterial and venous phases using MR angiography.
Main Methods:
- Intraarterial injections of gadopentetate dimeglumine were administered.
- A fast spoiled-gradient-echo MR sequence was employed.
- Imaging was performed on rabbit aortas and canine coronary arteries.
Main Results:
- Real-time projection angiographic images were successfully obtained.
- Clear visualization of arterial filling and washout was achieved.
- Venous and perfusion phases were distinctly displayed.
Conclusions:
- MR-based arterial fluoroscopy is feasible.
- This technique offers a potential alternative to traditional angiography.
- The method allows detailed visualization of vascular dynamics.