Six-Year-Old Gary Couldn't Stop Throwing Up After Being Hit on His

Multiple Choice

Six-year-old Gary couldn't stop throwing up after being hit on his head. To help detect possible damage or brain swelling, doctors took a detailed image of the boy's brain structures using a powerful, non-invasive technique that involves harmless magnetic fields. What instrument was used?

A) PET scanner
B) electroconvulsive therapy (ECT) instrument
C) transcranial magnetic stimulation (TMS)
D) MRI scanner