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Evaluation of voxel values in mandibular cancellous bone: relationship between cone-beam computed tomography and multislice helical computed tomography |
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| Authors: | Munetaka Naitoh Akiko Hirukawa Akitoshi Katsumata Eiichiro Ariji |
| Institution: | Department of Oral and Maxillofacial Radiology, School of Dentistry, Aichi-Gakuin University, Nagoya, Japan; Division of Radiology, Dental Hospital, Aichi-Gakuin University, Nagoya, Japan; Department of Oral Radiology, Asahi University School of Dentistry, Mizuho, Japan |
| Abstract: | Objective: Measurements of bone density in designed sites are important in presurgical imaging for dental implant treatment. However, the pixel or voxel values obtained from cone-beam computed tomography (CT) images are not absolute values. Hence, the relationship between voxel values obtained from cone-beam CT with a limited-volume exposure field and a flat panel detector and bone mineral densities (BMDs) obtained from multislice CT was evaluated in the mandible. Material and methods: A total of 16 (four males and 12 females) patients who had undergone imaging for mandibular dental implant treatment using cone-beam CT with Alphard VEGA and multislice CT were enrolled in this investigation. Cross-sectional images of cone-beam and multislice CT were reconstructed, and values of regions of interest (ROIs) in images were calculated. Results: A high-level correlation between voxel values of cone-beam CT and BMDs of multislice CT was observed ( r =0.965). Conclusion: It was suggested that voxel values of mandibular cancellous bone in cone-beam CT could be used to estimate bone density. |
| Keywords: | cancellous bone cone-beam computed tomography Hounsfield unit mandible multislice computed tomography |