4th November 2020

A 32-year-old man is brought to A&E after having been knocked off his bicycle (2)

A 32-year-old man is brought to A&E after having been knocked off his bicycle. He was not wearing a helmet and hit his head on the concrete pavement. He did not lose consciousness, but once the paramedics arrived, he was complaining of a worsening headache and becoming increasingly drowsy. 

Select the SINGLE most appropriate urgent investigation from the list below. Select ONE option only.