Computed tomography (CT) is today commonly used in imaging of the maxillofacial area. Conventional CT examinations are usually performed in medical X-ray departments. However, a relatively new technique named cone-beam computed tomography (CBCT) or digital volume tomography (DVT) has now also become available for dental purposes. The advantage with this technique is a lower radiation dose compared to conventional CT. Common examples when DVT is used are; for diagnosing the position of impacted canines and suspected root resorption of the adjacent lateral incisor, preoperative planning of implant treatment and examination of periapical areas when intraoral radiography has given uncertain information. Conventional CT is used for examination of larger areas in diagnosing e.g. facial anomalies, extensive traumata and tumours.