JIM VARNEY / SCIENCE PHOTO LIBRARY JIM VARNEY / SCIENCE PHOTO LIBRARY
Chest X-ray. View of a female patient undergoing a chest X-ray. She is standing in front of undeveloped X-ray film with her arms out from her sides. The equipment is being operated by a radiographer. The X-ray source is positioned behind the patient and is operated remotely to ensure that the radiographer does not receive an excessive cumulative dose of radiation. Radiography is an important diagnostic technique for studying internal structures. X-rays are high-energy electromagnetic waves which can penetrate soft tissue but which are absorbed in harder tissues such as bone.
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