A cranial ultrasound uses high-frequency sound waves to produce images of the brain. Your child will likely receive a sedative or light general anesthesia beforehand. This test is painless, but it's noisy and can take up to an hour to complete. ![]() An MRI can often identify lesions or abnormalities in your child's brain. An MRI uses radio waves and a magnetic field to produce detailed 3D or cross-sectional images of the brain. Brain scansīrain-imaging technologies can reveal areas of damage or abnormal development in the brain. Your doctor might also order a series of tests to make a diagnosis and rule out other possible causes.
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