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[[file:figure 1.1.3.jpg|200px|thumb|'''Figure 1:''' Example of plain film radiography]][[file:Brain-Computed tomography.jpg|200px|thumb|'''Figure 2:''' Example of brain Computed tomography ([https://www.researchgate.net/publication/5822266])]][[file:Pet_CT.jpg|200px|thumb|'''Figure 3:''' Example of true positive metastatic lesions detected by 18F-FDG PET/CT restaging (Courtesy: Eur. J. Nucl. Med. Mol. Imaging, 45: 1742/CC By 4.0)]]
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==Diagnostic Radiology==
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Diagnostic radiology, the imaging modalities using ionizing radiation, produces images of anatomical internal structures of human organs and physiological (functional) biological systems and helps significantly improve patient management and care in screening and diagnosis, assessing treatment response, predicting prognosis, and detecting disease recurrence. Modern diagnostic radiology assures faster, more precise diagnosis and enables monitoring of a large proportion of diseases. It has been estimated that in about one half of all cases, radiological procedures (conventional radiography, fluoroscopy, computed tomography) have a substantial impact on the speed of diagnosis and in a large fraction of cases they are of decisive importance in guiding patient management and therapy.
