**6. Nuclear medicine techniques**

Radioactive tracers is used by Diagnostic techniques in nuclear medicine that emit gamma radiation. The camera produces an image from the points at the radiation emission. The nuclear medicine techniques include

a.Single Photon Emission Computerized Tomography (SPECT)

b.Positron Emission Tomography (PET),

c. computed tomography-PET (PET-CT) (for better anatomical visualization)

d.micro-PET (with ultra-high resolution)

e.micro computerized axial tomography micro-CAT.

All above techniques are utilized to analyze biochemical dysfunctions with the purpose of showing early signs of the disease, their mechanisms and association with disease states.
