Answer:
3: A device that uses radioactive fluid to determine the active areas of the brain
Explanation:
A positron emission tomography (PET) scan is an imaging test that helps reveal how your tissues and organs are functioning. A PET scan uses a radioactive drug (tracer) to show this activity. This scan can sometimes detect disease before it shows up on other imaging tests.
Depending on the type of exam, the radiotracer is injected, swallowed or inhaled as a gas. It eventually accumulates in the area of the body under examination. A special camera or imaging device detects radioactive emissions from the radiotracer. The camera or device produces pictures and provides molecular information.
I’m not sure how to answer your question if there is no link to the video?
Use the basic engineering flow chart
Find your problem
Identify solution
Basic calculations
Prototype
Review
Does it work? If not start again from prototype
From what I know it fills the skin in more causing it to stretch taking the wrinkles away.
