Nuclear Medicine procedures commonly called "Scan" are painless, safe procedures, which provides information about the function of an organ and to some extent, the anatomy of the same.

A very small safe amount of radioactive material is administered either by injection in the vein or by mouth through a breathing device or swallowed or by some other method to place it in the body which then travels to the intended organ. A specialised camera i.e. SPECT gamma camera records this radioactivity in the form of images. There are number of different radio labeled compounds used, and depending on their composition, they concentrate in different body organs.