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Pulmonary arteriovenous malformations: three-dimensional gadolinium-enhanced MR angiography-initial experience
D D Maki1, E S Siegelman, D A Roberts
1Department of Radiology, University of Pennsylvania Medical Center, Philadelphia, USA. cactusrad@hotmail.com
Radiology
|March 29, 2001
Summary
Three-dimensional MR angiography shows promise for diagnosing pulmonary arteriovenous malformations (PAVMs). This technique accurately identifies feeding arteries, though small PAVMs may be challenging to detect.
Area of Science:
- Radiology
- Medical Imaging
Background:
- Pulmonary arteriovenous malformations (PAVMs) are abnormal connections between pulmonary arteries and veins.
- Accurate diagnosis and pre-treatment assessment of PAVMs are crucial for effective management.
Purpose of the Study:
- To evaluate the efficacy of 3D gadolinium-enhanced MR angiography in identifying PAVMs.
- To assess the capability of this technique in determining the size and number of feeding arteries to PAVMs.
Main Methods:
- Eight patients with suspected PAVMs underwent 3D MR angiography at 1.5 T.
- A single radiologist, blinded to conventional angiography results, analyzed the MR images.
- PAVMs and their feeding arteries were assessed for size, number, and location.
Main Results:
- 3D MR angiography identified 90% of PAVMs confirmed by conventional angiography or surgical specimens.
- One small, peripheral PAVM was missed prospectively.
- Two additional PAVMs were detected in patients not undergoing further procedures.
Conclusions:
- 3D MR angiography is a valuable, noninvasive tool for diagnosing PAVMs.
- The technique excels at visualizing feeding arteries prior to treatment.
- Smaller PAVMs (<5 mm) may be less reliably detected.