Perfusion CT Scan

Computed tomography (CT) perfusion of the head uses special x-ray equipment to show which areas of the brain are adequately supplied with blood (perfused) and provides detailed information about blood flow to the brain. CT perfusion is fast, painless, noninvasive and accurate. It's a useful technique for measuring blood flow to the brain, which may be important for treating stroke, brain blood vessel disease and brain tumors.

What are some common uses of Perfusion CT Scan?

CT perfusion is typically used to:
  • Evaluate acute stroke.
  • Assist with selecting patients for thrombolytic therapy following a stroke by identifying brain tissue at risk of infarction or permanent injury by lack of an adequate blood supply.
  • Evaluate vasospasm, a sudden blood vessel constriction that may arise from a subarachnoid hemorrhage, in which bleeding occurs in the space between the two membranes surrounding the brain, known as the dura mater and arachnoid membrane.
  • Assess patients who are candidates for surgical or neuroendovascular treatments. The technique employs special catheters (long, thin tubes), some containing special instruments, that can be manipulated into the area of vessel blockage to dissolve or dislodge a blood clot.
  • Diagnose and assess treatment response in patients with a variety of brain tumors.

Perfusion CT Scan is recommended in following conditions:

  • Epilepsy
  • Dementia
  • Stroke or transient ischemic attack
  • Subarachnoid hemorrhage
  • Carotid stenosis
  • Cerebral vasculitis
  • Brain tumor
  • Recent head injury
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