<unk>  is a medical specialty involving the application of radioactive substances in the diagnosis and treatment of disease.<unk>  imaging, in a sense, is "radiology done inside out" or "endoradiology" because it records radiation emitting from within the body rather than radiation that is generated by external sources like X-rays. In addition,<unk>  scans differ from radiology, as the emphasis is not on imaging anatomy, but on the function. For such reason, it is called a physiological imaging modality. Single photon emission computed tomography (SPECT) and positron emission tomography (PET) scans are the two most common imaging modalities in<unk> .
Nuclear medicine
Nuclear Medicine and Biology
Radionics
Radiomics
Biochemistry
Radiology
Nuclear technology
Radiopaedia