Question

john was injured in a car accident after which he lost consciousness for 10 minutes. he sustained numerous injuries and, most important, had a large, open wound on his head. when he arrived at the emergency room, the attending physician immediately ordered which neuroimaging technique to rule out any soft - tissue damage to the brain?
magnetic resonance imaging (mri)
an electroencephalogram (eeg)
positron emission tomography (pet)
single - cell recording

Explanation:

Magnetic resonance imaging (MRI) is best for visualizing soft - tissue structures like the brain. EEG measures electrical activity, PET shows metabolic processes, and single - cell recording is for studying individual neurons. Here, we need to rule out soft - tissue damage to the brain.

Answer:

A. magnetic resonance imaging (MRI)