<prompt> X-ray Aifact is -A radiolucent areaAny abnormal opacity in the radiographProduced when patient moves while taking the shootAll of the above  <response>: Common aifacts all forms of radiography motion aifact due to patient movement resulting in a distoed image image compositing or twindouble exposure superimposition of two structures from different locations due to double exposure of same filmplate radiopaque objects onexternal to the patient e.g. debris in the housing debris in the housing caused by the collimator tube can cause small trapezoidal regions, indicative of lead shavings 