This X-ray imaging apparatus comprises a rotary arm (5) and an image assembly (2) comprising an X-ray source (3) and an X-ray detector (4) so that the X-rays emitted by the X-ray source are incidental to the detector.The X-ray source (3) is coupled to the rotary arm (5) through a movable support (9) able to set the distance between the X-ray source and the object and the movement of the X-ray source being dynamically controlled during a tridimensional imaging.
