Medical imaging refers to several different technologies that are used to study the human body for the purpose of diagnosing, monitoring, or treating medical conditions. These technologies provide different information about the area of the body that is being studied or treated, related to a possible disease, injury, or the effectiveness of medical treatment.
It is divided into two major types: those that have an excellent resolution and provide precise anatomical details e.g., computed tomography (CT) and magnetic resonance (MR) and those that generate a representation of the function of organs or tissues being analysed also known as Molecular Imaging such as Single Photon Emission Computed Tomography (SPECT) and Positron Emission Tomography (PET).
Imaging technologies are fast-growing and evolving disciplines that allow the visualization, characterisation and quantification of anatomical lesions or biologic events that occur at early stages of disease. The past two decades have seen the development of hybrid imaging, which combines the anatomical and functional images such as SPECT/CT, PET/CT and PET/ MR . Thus, generating a powerful tool for the diagnosis of several health conditions, in particular non-communicable diseases such as cardiovascular diseases, cancer, neurodegenerative disorders and diabetes which are the leading causes of mortality worldwide and that represent a burden on health care systems.