Venography

Venography refers to any imaging technique which allows for visualisation of veins. The equivalent for arteries is called angiography, and both can be performed during the same procedure. Venography can be performed with CT or MR. Duplex ultrasonography is also used to visualise veins, but this isn't referred to as venography.

CT venography

CT venography involves using iodine contrast to visualise veins. This is usually indicated for:

• Cerebral venous thrombosis
• Venous thromboembolism
  • DVTs where ultrasound can't visualise
• Superior vena cava syndrome
• Vascular malformations

MR venography

MR may also be used for venography, mostly for the same indications as CT if iodine contrast is contraindicated.

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