title: Study of effective dose of various protocols in equipment cone beam CT.
abstract: This study has the purpose of assessing the radiation absorbed dose in organs/tissues and estimating the effective dose using five different models of Cone Beam Computed Tomography equipment using protocols with similar purpose. For this purpose, 26 thermoluminescent dosimeters were inserted in the position of the organs/tissues of a female anthropomorphic phantom. From the measurements the contribution of wT×HT in the organs and tissues the effective dose were calculated. The measurements have shown the effective dose values within the range 9.3-111.5µSv. The effective dose values by field of view (FOV) size are within the following ranges: 9.3-51.2µSv, 17.6-52.0µSv, and 43.1-111.5µSv for small/located, medium and large FOV respectively. Protocols with same purpose, carried out with different models of equipment, presented significant differences in the values of the equivalent and effective doses. From the point of view of radiological protection, it is not enough to have knowledge about the dimensions of the FOV and the purpose of the examination. It is necessary to assess the dose using the different models of the equipment and protocols available. In this context, this study provides useful information for this assessment.
authors: Federal University of Sergipe, UFS, NPGFI, Rod. Marechal Rondon s/n, Jardim Rosa Elze, CEP: 49.100-000, São Cristóvão, SE, Brazil. Electronic address: mrs2206@gmail.com.
authors: Maria Rosangela
authors: MR
authors: Soares
authors: Federal Institute of Bahia, IFBA, Rua Emídio dos Santos, s/n. Barbalho, CEP: 40301-015 Salvador, BA, Brazil.
authors: Wilson Otto
authors: WO
authors: Batista
authors: Nuclear and Energy Research Institute, IPEN, Av. Lineu Prestes 2242, Cidade Universitária, CEP: 05508-000 São Paulo, SP, Brazil.
authors: Patricia de Lara
authors: Pde L
authors: Antonio
authors: Nuclear and Energy Research Institute, IPEN, Av. Lineu Prestes 2242, Cidade Universitária, CEP: 05508-000 São Paulo, SP, Brazil.
authors: Linda V E
authors: LV
authors: Caldas
authors: Federal University of Sergipe, UFS, NPGFI, Rod. Marechal Rondon s/n, Jardim Rosa Elze, CEP: 49.100-000, São Cristóvão, SE, Brazil.
authors: Ana F
authors: AF
authors: Maia
keywords: Dental Cone Beam CT; Effective dose; Organs/tissues dose; Thermoluminescent dosimetry