a positron emission tomography (PET) scan is an imaging test that allows your doctor to check for diseases in your body. The scan uses a special dye containing radioactive tracers. These tracers are either swallowed, inhaled, or injected into a vein in your arm depending on what part of the body is being examined
The correct answer is D. all of the above
A. Tolerance with the drug
Its the same for caffein think about it some people have to drink more to get the same effect because there body’s has developed a tolerance and thats how u get addicted. You have to increase the amount which is addiction.
