Acephalometric radiograph (cephalogram or cephalometric X-ray) is a radiograph of the head, used particularly for orthodontic diagnosis. A detailed analysis of cephalograms allows for an assessment of spatial relationships of teeth, jaws and other skull structures in the patient. It is necessary for accurate diagnosis of occlusal abnormalities and treatment planning. The comparison of examinations performed before and after the treatment makes it possible to evaluate the effects of treatment.