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Home > Cerebral Palsy > Cerebral Palsy Diagnosis > Cerebral Palsy Imaging Tests
Last Updated: May 12, 2025

Cerebral Palsy Imaging Tests

Page Medically Reviewed and Edited by Pierrette Mimi Poinsett, M.D.
Page Medically Reviewed and Edited by Pierrette Mimi Poinsett, M.D.

This article has been fact checked by a Board Certified Pediatrician. Sources of information for the article are listed at the bottom.

For any content issues please Contact Us.

Cerebral palsy imaging tests include ultrasounds, CT scans, and MRIs. These scans help doctors look for brain damage and confirm a diagnosis of cerebral palsy, along with other diagnostic methods. Imaging scans can be a little scary, but are not painful.

Magnetic Resonance Imaging (MRI)

An MRI (magnetic resonance imaging) is one of the most effective imaging tests, as it uses both radio waves and magnetic fields to capture images of the child’s brain and, if needed, the child’s spine.

However, these tests can be tricky when performed on children, as they must remain still for a lengthy imaging session, which generally lasts anywhere from 15 to 60 minutes or even longer.[1]

It’s also usually uncomfortable for children due to loud noises and being confined, but the test itself is painless. A child may get a sedative to help them feel comfortable and stay still.

If an MRI of the brain is needed only, the images will indicate any abnormalities in the brain structure. If an MRI of the spinal cord is conducted, it helps reveal any abnormalities that cause leg spasticity problems, bladder issues, and complications of the bowels.

An MRI can also detect additional problems in the brain, should they exist, such as brain tumors, bleeding, or swelling.

Cranial Ultrasound

A cranial ultrasound is a preferred imaging test because it’s easier for infants when compared to an MRI. However, depending on the issue to be detected, a cranial ultrasound may not provide imaging results as clear as an MRI.[2]

A cranial ultrasound must be performed during infancy before the cranial bones are completely formed. Once the child’s cranial bones form, the bones will block the imaging.

During a cranial ultrasound, an image captures the brain waves with high-frequency sound. The procedure is painless and relatively faster than an MRI.

Computerized Tomography Scan (CT Scan)

A computerized tomography scan (CT scan) obtains images of the child’s brain via X-rays, giving physicians cross-sectional images.[3] Cross-sectional images can help get a cerebral palsy diagnosis by detecting abnormalities in the brain.

A CT scan is pain-free and typically lasts anywhere between 15 and 20 minutes. However, like an MRI, the child must remain still the entire time. They may get a mild sedative to help them stay still during the process.

It’s important to note that a CT scan uses ionizing radiation when performing the tests. Some studies suggest that high amounts of ionizing radiation can harm a child’s developing brain. If your physician recommends a CT scan for your child, make sure you go over all the risks involved with your doctor before making a final decision.

If you and your doctor decide that a CT scan is the best option for your child, Merck Manual suggests that you:

  • Request the lowest dose of radiation possible
  • Request that the lowest dose of radiation be limited as much as possible
  • Request that only one or a few scans be performed

Electroencephalogram (EEG)

In some instances, an electroencephalogram (EEG) will be administered. An EEG is a relatively painless procedure to determine if a child has epilepsy. Epilepsy and seizures are common in children with cerebral palsy.

During an EEG, numerous electrodes are attached to the child’s head, which can detect the brain’s electrical activity.[4] Children with epilepsy typically show abnormal changes in brain waves.

Will Imaging Tests Confirm Cerebral Palsy?

According to the American Academy of Neurology (AAN), imaging tests sometimes confirm cerebral palsy and other accompanying tests, such as motor development exams. In other instances, however, additional tests will be administered if the imaging tests and associated exams are not enough.

Additional tests may include genetic testing, metabolic tests, and coagulation tests. Keep in mind that there is no single test that can confirm cerebral palsy. Your child will likely go through many tests, screenings, and exams before you receive a final diagnosis.

Which Imaging Tests Does My Child Need?

Since each child has unique medical issues, there is no way to determine which test would work best for your child. You and your child’s physician will communicate and work together to decide which tests would be the most beneficial in helping to diagnose your child’s condition.

In addition, a pediatric neurologist may work with you and your doctor to determine which imaging tests will suit your child.

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References

  1. Mayo Clinic. (2023, September 9). MRI.
    Retrieved from: https://www.mayoclinic.org/tests-procedures/mri/about/pac-20384768
  2. James, A.C. (2018, September). Practical Guide to Neonatal Cranial Ultrasound (CrUS): Basics. Paed. Child Health. 28(9), 424-30.
    Retrieved from: https://www.sciencedirect.com/science/article/abs/pii/S1751722218301392
  3. Mayo Clinic. (2022, January 6). CT Scan.
    Retrieved from: https://www.mayoclinic.org/tests-procedures/ct-scan/about/pac-20393675
  4. Johns Hopkins Medicine. (n.d.). Electroencephalogram (EEG).
    Retrieved from: https://www.hopkinsmedicine.org/health/treatment-tests-and-therapies/electroencephalogram-eeg
View All References
Page Medically Reviewed and Edited by Pierrette Mimi Poinsett, M.D.

Page Medically Reviewed and Edited by Pierrette Mimi Poinsett, M.D.

Dr. Poinsett is a board certified pediatrician. She is a graduate of The University of Chicago, Pritzker School of Medicine, and has over 20 years of clinical experience. She has extensive experience in the case management of children with special mental health and physical health care needs, including developmental disabilities.

See Full Bio

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