CT � Cerebral contusion: This 18-year-old man was brought to the emergency department after a rollover motor vehicle accident. On arrival he was intubated and sedated for respiratory failure secondary to pneumothorax. Examination revealed intact brain stem reflexes and decreased spontaneous movement of the left side of his body. This head CT scan shows a large area of hypodensity with intermixed hyperdense lesions within the right frontal lobe. This is consistent with a right frontal hemorrhagic cerebral contusion.