Cone-beam computed tomography (CBCT) is a relatively new technique. It generates a 3D image by emitting a pulsed cone-shaped X-ray beam. CBCT has become a very useful and widely used technique for dentomaxillofacial imaging over the last decade. It provides clear, high resolution multiplanar reconstruction images. Previously, the images could only be generated while the patient was sitting with his/her head fixed in position. With the presented new generation CBCT (NewTom 5G, QR, Verona, Italy), a more free positioning of the patient, either lying or sitting, is possible. In this way, skeletal imaging of various body parts becomes possible. In this article we present three clinical cases of CBCT imaging of the wrist, describe the background of the technique, and discuss the advantages and disadvantages of CBCT imaging.

• CBCT and MSCT are both suited for evaluation of sinonasal poliposis. • Effective dose for MSCT was 42% higher compared to CBCT. • In patients with sinonasal poliposis, clinically important anatomical structures are better delineated with MSCT. • In patients with normal radiological findings, clinically important anatomical structures are better delineated with CBCT.

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A 48-year old male patient of Arabic origin presented to the orthopedic consultation with a history of slow progressive pain, joint stiffness and swelling of the left foot. Local tenderness was present and a painful, hard mass was clearly palpable. Conventional radiography (Fig. A) revealed undulating and sclerotic enlarged areas (candle wax-appearance) in the lateral cuneiform bone, the third metatarsal bone and the proximal, intermediate and distal phalanx bone of the third row. Cortical hyperostosis was also apparent in the middle phalanx and metatarsal bone of the second row. Areas of extraosseous bone formation could be seen, most clearly adjacent to the metatarsal head and the middle phalanx of the third row.