Which technique is likely to be most useful for identifying the activity of a specific neurotransmitter in the brain

A)  computerized tomography 
B)  positron emission tomography 
C)  electrographic tomography 
D)  magnetic resonance imaging

Positron Emission Tomography

An imaging test that uses a radioactive substance to look for disease in the body, especially useful in detecting cancer and examining brain function.

Neurotransmitter

Chemical substances in the nervous system that transmit signals across a synapse from one neuron to another.

Computerized Tomography

A medical imaging technique that uses computer-processed combinations of multiple X-ray measurements taken from different angles to produce cross-sectional images of specific areas of a scanned object.