It is common for imaging tests to appear normal in traumatic brain injury cases, especially with mild TBI. Standard CT and MRI scans do not always detect microscopic damage to brain cells or disruptions in the brain’s normal function. Diagnosis often relies on neurological exams, cognitive testing, and documented symptoms over time. If you continue to experience headaches, memory problems, or personality changes, follow up with medical professionals. Proper records are critical in complicated brain injury cases.