Xray aifact is

Aifacts can present in a variety of ways including abnormal shadow noted on a radiograph or degraded image quality and have been produced by aificial means from hardware failure, operator error, and software (post-processing) aifacts. Common CausesImproper handling of the filmsErrors while processing the filmsPatient movement while taking the shootingCommon aifactsmotion aifact - due patient movement resulting in the distoed imageimage compositing (or twin/double exposure) - superimposition of two structures from different locations due to double exposure of same film/plateradio-opaque objects on or external to the patient (e.g. necklaces, piercings, buttons, hair)(Ref: Radiographic Imaging and Exposure, 4e. Mosby chapter 9)