At the time of the accident, he hit his occiput and suffered whiplash. He was dazed but did not lose consciousness. He had posttraumatic amnesia, headache, neck pain, and dizziness. In the emergency room, his Glasgow Coma Scale score was 15/15. Over the following days and weeks, he had multiple persistent neuropsychiatric symptoms, including distractibility, impaired short-term and long-term memory, impaired visuospatial abilities, insomnia, fatigue, and blurry vision. Neuropsychological testing confirmed impairments in memory and other cognitive abilities. Nine months after the accident, an MRI of the brain was interpreted in the traditional manner (that is, by visual inspection of the images) by the radiologist as showing two nonspecific T2 hyperintensities in the left frontal lobe. NeuroQuant® volumetric analysis of the same MRI data revealed that total hippocampal volume was 4.37 cm3, which was 0.29% of intracranial volume, falling below the first percentile, as compared with an age-matched normal-control group. The patient continued to work full-time at a job he had held for many years; however, his functioning was significantly impaired.