**3. SPECT—radiopharmaceuticals**

Radiopharmaceuticals which are used to diagnose the cancer and infection by using the γ-emitting radionuclides such as 111In and 99mTc are known as SPECT radiopharmaceuticals. The radiotracer which is used for diagnostic purposes should have following properties [5]:



**Table 3.**

*Common properties of γ-emitting radionuclides.*


Common properties of γ-emitting radionuclides for SPECT imaging are given in **Table 3**.
