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In page Carotid-cavernous fistula:

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This is based on MRI scan, magnetic resonance angiography and CT scan. A cerebral digital subtraction angiography (DSA) enhances visualization of the fistula.[citation needed]

  • Selective arteriography is used to evaluate arteriovenous fistulas.
  • High resolution digital subtraction angiography may help in classifying CCF into dural and direct type and thus formulate a strategy to treat it either by a balloon or coil or both with or without preservation of parent ipsilateral carotid artery.[citation needed]