An apparatus for Digital Imaging in the Head Region of a Patient is disclosed comprising:- a source (9) for generating X-ray radiation；- a sensor (11) for detecting X-ray radiation, which is generated by the source (9) and passes through a patient (14)；- a rotary arm (6) for arranging the source (9) and the sensor (11) thereon in such a way as to be opposed to each other, wherein the rotary arm (6) is provided with adjustment means (10, 12) for varying the distance between the source (9) and the sensor (11)；- a supporting structure (2, 3, 4, 5) for supporting the rotary arm (6), wherein motor driven translation and rotation means (7) are interposed between the rotary arm (6) and the supporting structure (2, 3, 4, 5),wherein- the apparatus comprises a control unit (16), that controls the source (9), the sensor (11), the adjustment means (10, 12), and the translation and rotation means (7) and that is arranged for operating the apparatus in various operation modes comprising different distances between source (9) and sensor (11), and wherein- the apparatus is provided with collision detection means (93, 94) connected with the control unit (16) and arranged for detecting a possible collision of the source (9) and/or sensor (11) with the patient (14) during the motion of the source (9) and/or sensor (11).
