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Percutaneous vascular intervention based on gadolinium-enhanced MR angiography
M J Sharafuddin1, J T Wroblicka, S Sun
1Department of Radiology, the University of Iowa Hospitals and Clinics, Iowa City 52242-1077, USA. mel-sharafuddin@uiowa.edu
Summary
Gadolinium-enhanced magnetic resonance angiography (Gd-MRA) reliably plans percutaneous vascular procedures, offering noninvasive imaging without iodinated contrast. This technique is becoming essential for pre-intervention workups, though it may underestimate stenosis complexity.
Area of Science:
- Vascular Imaging
- Interventional Radiology
- Medical Diagnostics
Background:
- Percutaneous vascular interventions require accurate pre-procedural imaging.
- Conventional catheter angiography (CA) is invasive and uses iodinated contrast.
- Noninvasive imaging modalities are sought to improve procedural planning and patient safety.
Purpose of the Study:
- To evaluate the reliability of gadolinium-enhanced magnetic resonance angiography (Gd-MRA) for planning percutaneous vascular interventions.
- To compare Gd-MRA findings with conventional catheter angiography (CA).
Main Methods:
- 31 patients underwent percutaneous vascular interventions planned solely based on Gd-MRA.
- 49 arterial segments were targeted, including extremities and visceral arteries.
- Interventions included angioplasty, stent placement, and thrombolysis.
Main Results:
- Gd-MRA showed good to strong correlation with CA for stenosis severity and length.
- Gd-MRA underestimated stenosis complexity and had lower predictive values for visceral arteries.
- Procedural planning value was high in 40 segments, satisfactory in five, and poor in four.
Conclusions:
- Gd-MRA provides reliable noninvasive anatomic and diagnostic information for planning percutaneous vascular interventions.
- Gd-MRA is a valuable tool, reducing the need for iodinated contrast.
- It is increasingly adopted as a key imaging modality for patients anticipating intervention.