The invention concerns a method for a dentomaxillofacial X-ray imaging. It is provided an X-ray beam (15) having a first radiation spectrum and a flat cross-sectional form towards a predetermined dentomaxillofacial area (Q) of a patient (P), and an image receptor (8) in a carrier (7) positioned outside the head of a patient. During a first exposure said X-ray beam and said carrier with the inserted image receptor are moved in a first rotational or linear direction, whereupon a first image of the dentomaxillofacial area is created on said image receptor. Then it is provided an X-ray beam having a second radiation spectrum and the flat cross-sectional form. During a second exposure said X-ray beam and said carrier with the same image receptor are moved in a second rotational or linear direction that is e.g. opposite to said first direction, whereupon a second image of the same dentomaxillofacial area is created on said image receptor. Finally the intensity values of the first image and the intensity values of the second image are subtracted from each other, whereupon a resultant image is formed, which resultant image is provided for further use.