TC com muito baixa dose de radiação, inferior a radiografia panorâmica: protocolo CTdBem para tomografia Multislice dental em pediatria

• Ano de defesa: 2016
• Autor(a) principal: Haygert, Carlos Jesus Pereira
• Orientador(a): Baldisserotto, Matteo
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Pontifícia Universidade Católica do Rio Grande do Sul
• Programa de Pós-Graduação: Programa de Pós-Graduação em Medicina/Pediatria e Saúde da Criança
• Departamento: Escola de Medicina
• País: Brasil
• Palavras-chave em Português: RADIOGRAFIA PANORÂMICA; TOMOGRAFIA COMPUTADORIZADA; RADIAÇÃO - DOSAGEM; PEDIATRIA; MEDICINA
• Área do conhecimento CNPq: CIENCIAS DA SAUDE::MEDICINA
• Link de acesso: http://tede2.pucrs.br/tede2/handle/tede/7152

Objective: To compare the total radiation doses obtained in an optimized protocol tomography (MSCT) for hospital use (CTdBem), with the doses obtained in panoramic radiography for dental use, both in pediatric patients and to compare the actual radiation doses to lens, thyroid, salivary glands and gonads obtained from MSCT x panoramic radiograph. Methods: radiation dose data obtained were used in examinations of pediatric patients, and children under 18 years of age treated at the University Hospital of Santa Maria (HUSM), who needed dental evaluation by diagnostic imaging methods. The value of the estimated effective dose of radiation was obtained by computational calculations using the data CTDI (Computed Tomography Dose Index) and DLP (Dose Lenght Product) of MSCT and DAP values (Dose Area Product) for panoramic radiography equipment. The organs were: crystalline, thyroid, salivary glands and gonads, and compared the effective doses of radiation obtained for the different equipment. The radiographic examinations were performed using the pan in equipment X-ray Instrumentarium OP200, 57-85kV, 2-16mAs and acquisition time of approximately 11 seconds. For MSCT was used Toshiba Aquilion64 using 120kV, 10mAs but and acquisition time of approximately 6 seconds. Results: Comparison of DLP CTdBem protocol with panoramic radiograph showed dose values 28,48mSv and 36,45mSv respectively. Comparing the effective doses were found dose values for salivary gland 0,28mSv and 0,36mSv to gonads 2,28mSv and 2,92mSv for thyroid 0,28mSv and 0,36mSv and lens 3, 42mSv and 4,37mSv. Conclusion and Clinical Relevance: The authors conclude that the total doses and also the effective doses of radiation to lens, thyroid, salivary glands and gonads obtained in an optimized protocol of multislice computed tomography for hospital use (CTdBem) doses were lower based on panoramic radiographs.