Radiograph (X-ray)
A radiograph is an imaging test used to produce images of the body, particularly the bones and joints, chest, abdomen and pelvis. It is generated by passing x-rays from an x-ray source machine, through the part of the patient that needs imaging and onto a digital x-ray detector on the other side. The different tissues in the body absorb the x-rays by differing amounts according to their density and change the energy of the x-ray photons, altering how they expose the x-ray detector (similar to light affecting photographic film). X-rays are a part of the electromagnetic spectrum (which includes visible light) and are a form of ionising radiation.