Concussions are generally not detectable by CT. Concussion is a brain dysfunction that occurs after the brain has been impacted by an external force, and the impact occurs through the brain, and will show symptoms such as transient coma, retrograde amnesia, nausea, headache, vomiting, etc. It is a relatively mild type of brain injury, and there is no organic damage, which can’t be detected by a CT examination or an MRI examination. Although a concussion cannot be diagnosed by CT examination alone, it is important to go to the hospital for a CT examination of the brain to see if there are any craniocerebral fractures, cerebral contusions, or subarachnoid hemorrhages. Seek medical attention as soon as you experience discomfort to avoid delays.