Nuclear medicine involves the use of radioactive materials, or isotopes,
to obtain specific diagnostic information.
These isotopes transmit a pattern of rays representing the organ size,
shape and function. The rays are detected by a special camera which, when
coupled with a computer, produces a characteristic image on a screen.
Nuclear medicine tests differ from most other imaging modalities in that
diagnostic tests primarily show the physiological function of the system
being investigated as opposed to traditional anatomical imaging such as
CT or MRI. Nuclear medicine imaging studies are generally more organ or
tissue specific (e.g.: lungs scan, heart scan, bone scan, brain scan,
etc.) than those in conventional radiology imaging, which focus on a particular
section of the body (e.g.: chest X-ray, abdomen/pelvis CT scan, head CT
Click here from more information on PET Scans.