CT cerebral venography

CT cerebral venography is a contrast enhanced examination with an acquisition delay providing an accurate detailed depiction of the cerebral venous system. 

Rapid diagnosis of cerebral venous thrombosis.

  • general CT contraindications such as pregnancy, etc.
  • IV iodinated contrast contraindications, such as chronic renal failure 

Actual procedure will vary depending on institutional protocol/guidelines, but a typical protocol will include 5:

  • peripheral venous access (18-20G) in an antecubital vein
  • non-ionic contrast material is injected at 4-5 mL/s for a total of 100-120 mL with a 45-second prescanning delay
  • a helical scan is performed by scanning caudally from the calvarial vertex to C1
  • images are analyzed on a dedicated workstation
  • proper evaluation of the dural sinuses indicates proper inspection of the axial thin-section contrast-enhanced source images of a helical CT scan
  • two-dimensional (2D) & three-dimensional (3D) multiplanar images, as well as rendering techniques such as maximum intensity projection (MIP), surface shaded displays (SSD) and volume rendering (VR) in a sagittal, coronal, and oblique planes
  • an essential step in CT venography is the removal of bone from the images, by graded subtraction
  • dural venous sinus thrombosis
  • thrombosis recanalization, the sinus shows an irregular appearance with multiple intrasinus channels and dural collateral vessels
  • sinus stenosis or occlusion secondary to tumor invasion (e.g. meningioma)
  • vascular malformations (e.g. AVM, dural arteriovenous fistula or developmental venous anomaly)
  • idiopathic intracranial hypertension: bilateral stenoses of the transverse sinuses, without definitive evidence of current or prior thrombosis
  • cerebral parenchymal abnormalities such as hemorrhagic infarction
CT examinations
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Article information

rID: 42089
Section: Anatomy
Tag: cases, cases
Synonyms or Alternate Spellings:
  • CT cerebral venogram
  • CT dural sinus venography

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Cases and figures

  • Case 1: normal CT cerebral venogram
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