Dentomaxillofacial Radiology · 2009 · 153 citations · 31 references
Veterinary MedicineOral RadiologyRadiologyDiagnostic ImagingRadiation DosimetryTreatment PlanningComputed TomographyDental Implant ImagingDental RadiographyImplant Treatment PlanningRadiographic ImagingThree-dimensional ReconstructionCone Beam Computed Tomography ComparisonCone-beam Computed Tomography (Cbct)Image Intensifier SystemsImage-based Implant PlanningImplant Planning ImagingMultidetector Computed TomographyThree-dimensional Imaging Of ImplantsVolumetric Imaging
Volumetric CT using a cone beam has been developed by several manufacturers for dentomaxillofacial imaging. The study measured radiation doses for implant planning using CBVI compared to conventional MDCT, evaluating two CBVI systems (3D Accuitomo and CB MercuRay). Doses were measured on an Alderson phantom using radiophotoluminescence glass dosemeters for the 3D Accuitomo (80 kV, 5 mA, 18 s), CB MercuRay (120 kV, 15 mA, 9.8 s), and MDCT (120 kV, 100 mA, 0.7 s, 77 mm scan length), with absorbed doses converted to effective doses per ICRP definitions. The 3D Accuitomo delivered absorbed organ doses of 1–5 mGy and effective doses of 18–66 μSv, several to ten times lower than CB MercuRay and an order of magnitude lower than MDCT.
Volumetric CT using a cone beam has been developed by several manufacturers for dentomaxillofacial imaging. The purpose of this study was to measure doses for implant planning with cone beam volumetric imaging (CBVI) in comparison with conventional multidetector CT (MDCT).The two CBVI systems used were a 3D Accuitomo (J. Morita), including an image-intensifier type (II) and a flat-panel type (FPD), and a CB MercuRay (Hitachi). The 3D Accuitomo operated at 80 kV, 5 mA and 18 s. The CB MercuRay operated at 120 kV, 15 mA, 9.8 s. The MDCT used was a HiSpeed QX/i (GE), operated at 120 kV, 100 mA and 0.7 s, and its scan length was 77 mm for both jaws. Measurement of the absorbed tissue and organ doses was performed with an Alderson phantom, embedding the radiophotoluminescence glass dosemeter into the organs/tissues. The values obtained were converted into the absorbed dose. The effective dose as defined by the International Commission on Radiological Protection was then calculated.The absorbed doses of the 3D Accuitomo of the organs in the primary beam ranged from 1-5 mGy, and were several to ten times lower than other doses. The effective dose of the 3D Accuitomo ranged from 18 muSv to 66 muSv, and was an order of magnitude smaller than the others. In conclusion, these results show that the dose in the 3D Accuitomo is lower than the CB MercuRay and much less than MDCT.
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Development of a compact computed tomographic apparatus for dental use
Yoshinori Arai, E Tammisalo, Kenta Iwai et al. · Dentomaxillofacial Radiology · 1999 · 679 citations