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

Question

Quizplus · Accepted Answer

The non-invasive technique that involves harmless magnetic fields is commonly associated with MRI (Magnetic Resonance Imaging) scanning, making D the best choice. A PET scanner involves radioactive materials, TMS involves a magnetic coil on the scalp and ECT involves electric current applied to the scalp, which are all not mentioned in the article.

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