The Parent of an Adolescent Diagnosed with Schizophrenia Asks a Nurse

The parent of an adolescent diagnosed with schizophrenia asks a nurse, "My child's doctor ordered a positron-emission tomography (PET) scan. What is that?" Select the nurse's best reply.

A) "PET uses a magnetic field and gamma waves to identify problems areas in the brain. Does your teenager have any metal implants?"
B) "It's a special type of x-ray image that shows structures of the brain and whether a brain injury has ever occurred."
C) "PET is a scan that passes an electrical current through the brain and shows brain wave activity. PET can help diagnose seizures."
D) "PET is a special scan that shows blood flow and activity in the brain."