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Evaluation of voxel values in mandibular cancellous bone: relationship between cone‐beam computed tomography and multislice helical computed tomography

2009; Wiley; Volume: 20; Issue: 5 Linguagem: Inglês

10.1111/j.1600-0501.2008.01672.x

1600-0501

Munetaka Naitoh, Akiko Hirukawa, Akitoshi Katsumata, Eiichiro Ariji,

Advanced X-ray and CT Imaging

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.