Fig. 2

a–c An 11-year-old girl with torticollis since a trampolining accident. CT was performed to exclude a fixed rotation anomaly. CT with the patient’s head turned to the left (a), in neutral position (b) and turned to the right (c) demonstrates free movement in the atlantoaxial joint. The examination was performed in low-dose technique, kVp 100, reference mAs 50. Despite these low settings, the examination results in good image quality. CT is not well-suited for true dynamic imaging, but “snapshot” imaging at various stages of a continuous movement is possible