How is a brain aneurysm detected?

To find out if you have a brain aneurysm, your healthcare provider will order an imaging test. These tests show the size, shape and location of brain aneurysms:

  • MRI (magnetic resonance imaging).
  • CT (computed tomography).
  • Diagnostic cerebral angiogram
  • MRA (magnetic resonance angiography).
  • CTA (computed tomography angiography).

Occasionally, a ruptured aneurysm may not show on the initial imaging test. If your symptoms point to a ruptured aneurysm, your doctor may order a lumbar puncture (spinal tap). This test shows whether there’s blood in the fluid surrounding your brain.

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