X-rays are a form of ionizing radiation, they have great energy and therefore can penetrate through the human body and produce an image on a plate. In this step, the radiation is modified and therefore, when passing through dense structures such as bone in the plate, a white tone will appear, if it passes through structures with air, a black tone appears. Between both
Densities may appear different shades of gray, depending on the density of the structure crossed by the X-ray beams.

In this way a two-dimensional image of a body structure will be produced, with different shades from black to white separating structures and delimiting tissues. Although the radiation levels used are very low (for example, a Chest Rx is equivalent to the natural radiation we receive in approximately 5 days), safety and control measures are always promoted.