J Davies1, B Johnson, Na Drage. 1. Department of Dental Radiological Imaging, Kings College London Dental Institute, London, UK. jonathan.davies@kcl.ac.uk
Abstract
OBJECTIVES: The purpose of the study was to calculate the effective dose delivered to the patient undergoing cone beam (CB) CT of the jaws and maxillofacial complex using the i-CAT Next Generation CBCT scanner (Imaging Sciences International, Hatfield, PA). METHODS: A RANDO® phantom (The Phantom Laboratory, Salem, NY) containing thermoluminence dosemeters were scanned 10 times for each of the 6 imaging protocols. Effective doses for each protocol were calculated using the 1990 and approved 2007 International Commission on Radiological Protection (ICRP) recommended tissue weighting factors (E1990, E2007). RESULTS: The effective dose for E1990 and E2007, respectively, were: full field of view (FOV) of the head, 47 μSv and 78 μSv; 13 cm scan of the jaws, 44 μSv and 77 μSv; 6 cm standard mandible, 35 μSv and 58 μSv; 6 cm high resolution mandible, 69 μSv and 113 μSv; 6 cm standard maxilla, 18 μSv and 32 μSv; and 6 cm high resolution maxilla, 35 μSv and 60 μSv. CONCLUSIONS: Using the new generation of CBCT scanner, the effective dose is lower than the original generation machine for a similar FOV using the ICRP 2007 tissue weighting factors.
OBJECTIVES: The purpose of the study was to calculate the effective dose delivered to the patient undergoing cone beam (CB) CT of the jaws and maxillofacial complex using the i-CAT Next Generation CBCT scanner (Imaging Sciences International, Hatfield, PA). METHODS: A RANDO® phantom (The Phantom Laboratory, Salem, NY) containing thermoluminence dosemeters were scanned 10 times for each of the 6 imaging protocols. Effective doses for each protocol were calculated using the 1990 and approved 2007 International Commission on Radiological Protection (ICRP) recommended tissue weighting factors (E1990, E2007). RESULTS: The effective dose for E1990 and E2007, respectively, were: full field of view (FOV) of the head, 47 μSv and 78 μSv; 13 cm scan of the jaws, 44 μSv and 77 μSv; 6 cm standard mandible, 35 μSv and 58 μSv; 6 cm high resolution mandible, 69 μSv and 113 μSv; 6 cm standard maxilla, 18 μSv and 32 μSv; and 6 cm high resolution maxilla, 35 μSv and 60 μSv. CONCLUSIONS: Using the new generation of CBCT scanner, the effective dose is lower than the original generation machine for a similar FOV using the ICRP 2007 tissue weighting factors.
Authors: L H S Cevidanes; L J Bailey; G R Tucker; M A Styner; A Mol; C L Phillips; W R Proffit; T Turvey Journal: Dentomaxillofac Radiol Date: 2005-11 Impact factor: 2.419
Authors: M Loubele; R Bogaerts; E Van Dijck; R Pauwels; S Vanheusden; P Suetens; G Marchal; G Sanderink; R Jacobs Journal: Eur J Radiol Date: 2008-07-18 Impact factor: 3.528
Authors: Abeer A Almashraqi; Eman A Ahmed; Nashwa S Mohamed; Imad H Barngkgei; Nader A Elsherbini; Esam S Halboub Journal: Dentomaxillofac Radiol Date: 2017-04-12 Impact factor: 2.419
Authors: J J Morant; M Salvadó; I Hernández-Girón; R Casanovas; R Ortega; A Calzado Journal: Dentomaxillofac Radiol Date: 2012-08-29 Impact factor: 2.419
Authors: R Pauwels; G Zhang; C Theodorakou; A Walker; H Bosmans; R Jacobs; R Bogaerts; K Horner Journal: Br J Radiol Date: 2014-10 Impact factor: 3.039
Authors: Diego Coelho Lorenzoni; Guilherme Janson; Juliana Cunha Bastos; Roberta Martinelli Carvalho; José Carlos Bastos; Rita de Cássia Moura Carvalho Lauris; José Fernando Castanha Henriques; Terumi Okada Ozawa Journal: Clin Oral Investig Date: 2016-03-15 Impact factor: 3.573