PET scans use special chemicals to obtain a three-dimensional image of the brain.What kind of chemicals are these?
A)organic
B)compound
C)magnetic
D)radioactive

Question

Quizplus · Accepted Answer

PET scans use radioactive tracers, usually made up of compounds labeled with radioactive isotopes, such as fluorine-18, which are injected into the bloodstream. These tracers emit gamma rays, which are detected by the PET scanner to create a three-dimensional image of the brain.

PET Scans Use Special Chemicals to Obtain a Three-Dimensional Image