A traumatic brain injury is a unique type of injury because it is not readily visible. It is not like suffering a broken arm or facial laceration where the injury is immediately apparent. In order to substantiate your brain injury, medical records are the best proof so seek medical care. Medical testing may include CT scans, PET scans and MRI’s. Make sure that the results of these tests are included in your medical records. Once medical records are obtained, medical experts can testify about how the injury was sustained.