Radiography is the use of X-rays to view unseen or hard-to-image objects. The use of non-ionizing radiations (visible light and ultraviolet light) to view objects should be considered as a normal “optical” method (e.g., light microscopy). The modification of an object through the use of ionizing radiation is not radiography. Depending on the nature of the object and the intended outcome it can be radiotherapy, food irradiation, or radiation processing
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