Which technique can best be described as using the measurement of radioactive isotopes to evaluate the activity of the brain?

"Positron emission tomography" is the best technique to be described as using the measurement of radioactive isotopes to evaluate the activity of the brain.

Explanation:

The positron emission tomography (PET) is an picture test scan that helps display how your organs and tissues are working.A Positron emission tomography scan uses a tracer or radioactive drug to display this activity. fewer-time this scan can catch the disease before it display up on other picture tests.It was the first scanning method to give functional information about the brain.It measures metabolic, pathology and physiology activity of the human body.

Cis correct i think

Are you asking about a street map usage  if so here is your answer  a street map for a very limited area could simply be a bit map or a .jpg image.  but a more general map would probably store the streets as vectors.  but you shouldn't assume that there is one way to do it