*2.1.2 Non-uniform distribution within compartment*

Radiopharmaceuticals are not distributed equally every time. In some conditions they exhibit non-uniform dispersion, therefore showing disordered physiological process (due to some disease or injury). The increased concentration of a radiopharmaceutical in any organ or tissue corresponds to the disturbance in normal physiological function of that organ or tissue (pathologic changes).

Examples:


#### *Medical Isotopes*

The decreased concentration of the radiotracer in a compartmental cavity is usually the outcome of block in the cavity as mentioned in following examples:

