Which of the following is true regarding positron emission tomography (PET)?
A)It is a direct measure of brain activity.
B)It is a very fast measure of brain activity.
C)It involves injecting a radioactive chemical into the person's bloodstream.
D)It involves measuring electrical activity from a person's scalp.

Question

Quizplus · Accepted Answer

PET involves injecting a radioactive chemical known as a tracer into the person's bloodstream, which is then detected by a scanner to produce a 3D image of the brain's activity.

D is incorrect because measuring electrical activity from a person's scalp is known as electroencephalography (EEG).

A and B are incorrect because PET measures the metabolic activity of the brain rather than direct neural activity, and the process usually takes around 30-60 minutes to complete.

Which of the Following Is True Regarding Positron Emission Tomography