Maria Marcu1, Mihaela Hedesiu1, Benjamin Salmon2, Ruben Pauwels3,4, Andreas Stratis3, Anne Caroline Costa Oenning2,5, Mike E Cohen3, Reinhilde Jacobs3,6, Mihaela Baciut7, Raluca Roman1, Cristian Dinu7, Horatiu Rotaru7, Ioan Barbur7. 1. Department of Oral Radiology, Faculty of Dentistry, 'Iuliu Hatieganu' University of Medicine and Pharmacy, Cluj-Napoca, Romania. 2. EA 2496-Orofacial Pathologies, Imaging and Biotherapies Lab and Dental Medicine Department, Bretonneau Hospital, HUPNVS, AP-HP, Paris Descartes University - Sorbonne Paris Cité, Paris, France. 3. OMFS-IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, Catholic University of Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium. 4. Department of Radiology, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand. 5. Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas (Unicamp), Piracicaba, Sao Paulo, Brazil. 6. Department of Dental Medicine, Karolinska Institutet, Stockholm, Sweden. 7. Department of Maxillofacial Surgery, Faculty of Dentistry, 'Iuliu Hatieganu' University of Medicine and Pharmacy, Cluj-Napoca, Romania.
Abstract
BACKGROUND: An increasing number of CBCT units and a wide variability of radiation doses have been reported in dentistry lately. AIM: To estimate the effective, cumulative, and organ absorbed doses in children exposed to CBCT over 2 years. DESIGN: A prospective study was conducted in children who underwent CBCT diagnostic imaging with the ProMax3D machine. Organ and effective doses were calculated by Monte Carlo simulation using 5- and 8-year-old pediatric voxel phantoms. Extrapolation procedures were applied to estimate doses for other ages and CBCT protocols used in clinical conditions. RESULTS: The median effective dose was 137.9 μSv, and the median cumulative dose was 231.4 μSv. Statistically significant differences in the effective doses and cumulative doses were found for various indications of CBCT in children (P < 0.001). The median absorbed organ dose for brain and thyroid was significantly higher for the clinical condition that required large FOVs (2.5 mGy and 1.05 mGy, respectively) compared to medium (0.19 and 0.51 mGy) and small FOVs (0.07 and 0.24 mGy; P < 0.05). The radiation dose of salivary glands did not vary significantly with FOV. CONCLUSION: The results revealed the variation of CBCT doses and the influence of FOV size in pediatric exposure.
BACKGROUND: An increasing number of CBCT units and a wide variability of radiation doses have been reported in dentistry lately. AIM: To estimate the effective, cumulative, and organ absorbed doses in children exposed to CBCT over 2 years. DESIGN: A prospective study was conducted in children who underwent CBCT diagnostic imaging with the ProMax3D machine. Organ and effective doses were calculated by Monte Carlo simulation using 5- and 8-year-old pediatric voxel phantoms. Extrapolation procedures were applied to estimate doses for other ages and CBCT protocols used in clinical conditions. RESULTS: The median effective dose was 137.9 μSv, and the median cumulative dose was 231.4 μSv. Statistically significant differences in the effective doses and cumulative doses were found for various indications of CBCT in children (P < 0.001). The median absorbed organ dose for brain and thyroid was significantly higher for the clinical condition that required large FOVs (2.5 mGy and 1.05 mGy, respectively) compared to medium (0.19 and 0.51 mGy) and small FOVs (0.07 and 0.24 mGy; P < 0.05). The radiation dose of salivary glands did not vary significantly with FOV. CONCLUSION: The results revealed the variation of CBCT doses and the influence of FOV size in pediatric exposure.
Authors: Marine Deleu; Dorothea Dagassan; Isabelle Berg; Julie Bize; Karl Dula; Vincent Lenoir; Barbara Ott; Julien G Ott; Francis R Verdun; Robert Weber; Panagiotis Ziglinas; Cesare Zingariello; Marta Sans Merce Journal: Dentomaxillofac Radiol Date: 2020-04-17 Impact factor: 2.419