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Comprehensive time-resolved MRI of peripheral vascular malformations
Christoph U Herborn1, Mathias Goyen, Thomas C Lauenstein
1Department of Diagnostic and Interventional Radiology, University Hospital Essen, Hufelandstr. 55, Essen 45122, Germany.
AJR. American Journal of Roentgenology
|August 23, 2003
Summary
Magnetic Resonance Imaging (MRI) and MR angiography are valuable for assessing extremity vascular malformations. Combining dynamic contrast-enhanced 3D MRI with STIR sequences improves evaluation, though conventional angiography remains crucial for treatment planning.
Area of Science:
- Radiology
- Medical Imaging
Background:
- Peripheral vascular malformations require accurate diagnostic assessment.
- Conventional imaging techniques like duplex sonography, venography, and arteriography have limitations in fully characterizing these lesions.
Purpose of the Study:
- To evaluate the diagnostic utility of MRI and MR angiography for peripheral vascular malformations.
- To compare MRI-based assessments with conventional imaging modalities.
Main Methods:
- Nineteen patients with suspected vascular malformations underwent MRI on a 1.5-T scanner.
- Imaging protocols included T1-, T2-, STIR, contrast-enhanced T1-weighted, and dynamic contrast-enhanced 3D gradient-echo MRIs.
- MR findings were compared with duplex sonography, venography, and digital subtraction angiography.
Main Results:
- MRI successfully identified venous malformations, arteriovenous malformations, and hemangiomas.
- STIR sequences effectively determined lesion extent, often underestimated by 3D MR angiography alone.
- Dynamic contrast-enhanced 3D MR angiography was essential for lesion classification, but conventional angiography provided superior vascular detail for intervention planning.
Conclusions:
- MRI and MR angiography are beneficial for evaluating extremity vascular malformations.
- An optimal imaging protocol integrates dynamic contrast-enhanced 3D MRI with STIR sequences.
- Conventional digital subtraction angiography and venography remain necessary for definitive treatment decisions.