CT Scan (Computed Tomography) is a combination of X-rays taken from multiple angles, which generate cross-sectional images of bones, blood vessels, and soft tissue. This enables a CT scan to provide more detailed information than a single X-ray.
A CT scan cannot diagnose a concussion. However, it can show more serious injuries, such as a bleed in the brain. A CT scan may be done when trauma to the head occurs. Most emergency rooms will not perform a CT on a mild traumatic brain injury (mTBI), such as a concussion, due to the high amounts of radiation and the low chance of a positive test.
Someone who has suffered a head injury and whose condition worsens within the first 24-48 hours should seek medical attention. A CT scan may be performed to rule out a more serious issue.