Diagnosis at Mayo Clinic

By Mayo Clinic Staff

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Mayo Clinic doctors trained in brain conditions (neurologists) and brain surgery (neurosurgeons) diagnose moyamoya disease.

To diagnose moyamoya disease, your doctor will review your symptoms and your family and medical history. Your doctor will perform a physical examination and order several tests to diagnose moyamoya disease and any underlying conditions.

Tests may include:

  • Magnetic resonance imaging (MRI). An MRI uses powerful magnets and radio waves to create detailed images of your brain.

    Your doctor may inject a dye into a blood vessel to view your arteries and veins and highlight blood circulation (magnetic resonance angiogram).

  • Computerized tomography (CT) scan. A CT scan uses a series of X-rays to create a detailed image of your brain.

    Your doctor may inject a dye into a blood vessel to highlight blood flow in your arteries and veins (CT angiogram).

  • Cerebral angiogram. In a cerebral angiogram, your doctor inserts a long, thin tube (catheter) into a blood vessel in your groin and guides it to your brain using X-ray imaging.

    Your doctor then injects dye through the catheter into the blood vessels of your brain to make them visible under X-ray imaging.

  • Transcranial Doppler ultrasound. In a transcranial Doppler ultrasound, sound waves are used to obtain images of your neck. Doctors may use this test to evaluate blood flow in blood vessels in your neck.
  • Positron emission tomography (PET) scan or single-photon emission computerized tomography (SPECT). In these tests, your doctor injects you with a small amount of radioactive material and places emission detectors on your brain. PET provides visual images of brain activity. SPECT measures blood flow to various regions of your brain.
Apr. 26, 2014

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