Often in traumatic brain injury cases, a radiologist is needed to help interpret MRIs, PET scans, and CT scans. If a TBI victim was gainfully employed and lost their livelihood due to the injury, a vocational rehabilitation expert may be needed as well. A TBI victim may also need a life care planner depending on the severity of their injury and its expected long-term effects. Finally, an economist is often  required to take the life care plan and reduce it to present value.