전산화단층촬영상 소아의 측두골 계측

Background and Objectives: Radiographic imaging of the temporal bone is invaluable to the otologic surgeon contemplating cochlear implantation. HRCT scanning technology has increased the ability to assess the structures within the petrous pyramid. This study was performd to obtain anatomical data of developing temporal bone for pediatric cochlear implantation and to determine the normal course of skull and temporal bone development for the proper time of age for implantation. Materials and Methods: High-resolution temporal bone computed tomographic (CT) images of 56 patients were measured and analysed. Patients are aged from 1 to 19 years old. Using parameters are dimension of temporal bone, predictor for cochlear implantation, major feature, and cochlear ossification. Results: The growth of the skull and the Temporal bone was rapid during the first 5 years of life followed by gradual but steady development until the age of 15. Each portion of the Temporal bone was different in developmental rate and thickness of soft tissue covering temporal bone was variable. Also thickness of parietal bone, pneumatization and the size of facial recess was measured variably. No inner ear malformation and cochlear ossification was noticed radiologically. Conclusion: The results of analysis of temporal bone development will be utilized as anatomical data base for pediatric cochlear implantation. (J Clinical Otolaryngol 1999;10:195–201)