**7. Radiopharmaceuticals for diagnosis in human body**

A large number of chemicals that are absorbed by specific organs have been identified by specialists. For examples Thyroid absorbs iodine while the brain absorbs glucose. To monitor blood flow to the brain, liver, lung, heart, and kidney diagnostic radiopharmaceuticals can be used for that purposes see **Figure 2**. Destroying or weakening cancer cells can be done by particulate radiation as well as beta radiation causes ([3], p. 7).

This can be concluded that each organs of the human body requires different Radiopharmaceuticals to be administrated to it for the purpose of diagnose or treatment. This depends on the absorption of this organ to this chemical.

We can summarize the difference between normal medicines and radiopharmaceuticals is that the normal medicine has therapeutic effect while the latter does not. Besides that, radiopharmaceuticals have a short half-life, because of their rapid decay. For this reason, radiopharmaceuticals must be prepared immediately before their administration. The preparation and use of

#### *New Trends in Preparation, Bio Distribution, and Pharmacokinetics of Radiopharmaceuticals… DOI: http://dx.doi.org/10.5772/intechopen.101069*

#### **Figure 2.** *Lists the radionuclides most commonly used for diagnosis and treatment of different organs of the human body.*

radiopharmaceuticals with safety and expertise are therefore vital for operator and patient protection.
