PET scans

Question 1

positron emission tomography

Answer 1

use of gamma photons produced when positrons annihilate with electrons in the body and it maps out biologically active areas in the body

Question 2

purposes of the PET scan

Answer 2

to study blood flow and metabolism
to analyse certain cancers
to determine how advanced a cancer is

Question 3

how does a pet scan work

Answer 3

patient is injected with a tracer
radioactive tracer decays and positron is emitted
positron collides with electron
gamma rays go off in opposite directions and gamma detectors picked it up

Question 4

comparing cat scans and pet scans

Answer 4

pet scans are more expensive
pet scan takes longer cat scan is shorter

-cat scans give detailed tissue and bone structure images
pet scans just show biological functions of a part of a body