Medida do Kerma ar na superfície de entrada em tomografia computadorizada odontológica

• Ano de defesa: 2011
• Autor(a) principal: Legnani, Adriano
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Tecnológica Federal do Paraná; Curitiba; Programa de Pós-Graduação em Engenharia Elétrica e Informática Industrial
• Palavras-chave em Português: Tomografia computadorizada de feixe cônico; Odontologia; Radiação - Dosimetria; Radiação ionizante - Medidas de segurança; Simulação (Computadores); Engenharia elétrica; Tomography; Dentistry; Radiation dosimetry; Ionizing radiation - Security measures; Computer simulation; Electric engineering
• Link de acesso: http://repositorio.utfpr.edu.br/jspui/handle/1/371

This aim of this work is to measure the Entrance Surface Air Kerma, Ka,e, in Dental Computed Tomography, also known as CBCT (Cone Beam Computed Tomography). Data collection was conducted in six dental radiology clinics. Five of these have dental computed tomography scanner and one of them has a panoramic X ray scanner. The experimental essay is composed of a humanoid phantom filled with water. In addition, it has similar dimensions to a child that has head with lateral diameter of 14.5 cm. The Ka,e was measured with thermoluminescence dosimeters on the surface of the phantom. The locations of the dosimeters correspond to eyes and salivary gland (parotid glands). The technique used comprises the total area of the head, like a craniofacial examination. The configuration of extended FOV provides the highest Ka,e values. The technical parameters (kVp and mAs) and different modes of executing the FOV influenced the Ka,e results. Furthermore, there were differences between the results of three scanners of the same model. There is also a lack of symmetry on Ka,e distribution between both sides of the phantom. The CBCT with the lowest Ka,e on this work is of the same type of those with the lowest doses related on literature.