Imaging of the vascular system, in theory, is straightforward. The choice of imaging modality depends on many factors, including the type of lesion suspected and its anatomic location. Ultrasound (US), computed tomographic angiography (CTA), magnetic resonance angiography (MRA), and conventional angiography comprise the main modalities used to image the vascular system. Each has its advantages and disadvantages. In general, conventional digital subtraction angiography (DSA) is the current gold standard for vascular evaluation. Because this modality requires catheterization of an artery, it is not without risk and should generally be reserved for emergencies, clinical questions where other modalities have proven inadequate or possible therapeutic interventions. Other modalities offer less invasive ways to evaluate the vascular system and provide information needed for diagnosis and treatment.

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Approach to Vascular Imaging