The main principle of radiography
X-rays are sent by a radiation source which impact on an object and interfuse it partially.
Acording to its concentration the object absorbs more or less parts of the radiation. The rest impacts on the imaging plane which consists of more than one million sensors.
These sensors recieve the jet pulse and remit the informations to a computer. This Computer calculates from these signals 2-dimensional pictures and builds sourcing these pictures a 3-dimensional grayscale model.