Medical imaging refers to the human body or a part of the human body for the purpose of medical or medical research, non-invasive way to obtain internal tissue image technology and processing, is a kind of inverse problem deduction algorithm. 1895 German physicist R?ntgen discovered the X-ray, soon to be used for the human body's examination of disease, and thus the formation of the diagnostic radiology. Over the years, CT, MRI, ultrasound and nuclide imaging equipment have been continuously improved and perfected, and examination techniques and methods have been constantly innovated. Diagnostic imaging has developed from a single diagnosis relying on morphological changes to a comprehensive diagnostic system integrating morphological, functional and metabolic changes. At the same time, some new technologies, such as magnetic source imaging of the heart and brain, and new disciplines, such as molecular imaging, are constantly emerging, and the scope of diagnostic imaging is still under continuous development and expansion.
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