Magnetic Resonance Angiography (MRA) and Magnetic Resonance Venography (MRV) can be performed simultaneously with MRI and can supply additional information on the vascularity of the vascular birthmark lesion. Overall, the treatment method (e.g., surgery versus embolization or sclerotherapy) is generally selected based on the imaging findings. 

MR scanning needs to be performed using a dedicated imaging protocol, which includes injecting intravenous contrast material during the scan, to make an accurate diagnosis and to fully map out the vasculature of the lesion.

Unfortunately, inadequate MR scanning is commonly performed across the country and most of these scans are interpreted by inexperienced physicians. Also, catheter arteriography (an invasive diagnostic test) is unnecessarily performed on many patients. In some patients, Doppler US examinations are adequate for diagnostic testing. CT and x-ray imaging have a limited role in vascular anomalies/birthmarks. On the other hand, new multi-detector CT scanners may be used for vascular imaging (Computed tomographic angiography or CTA) in selected patients, particularly in patients with high flow vascular birthmarks (AVM, hemangioma, arteriovenous fistula or AVF).