The primary disadvantage of the PET scan technique relates to

A) the operating cost of the scanner.
B) the long half-life of the radioactive 2-DG molecule.
C) the inherent danger posed by the technique.
D) an inability of the technique to assess changes in metabolic activity.
E) the fact that the technique can measure neuron volume, but not activity.

Answer: A
Rationale: The primary disadvantage of the PET scan technique relates to the operating cost of the scanner.