Determinação de doses equivalentes em diagnósticos médicos utilizando a técnica de PET/CT
Positron emission tomography (PET/CT) is a nuclear medicine procedure used for medical diagnosis. In Brazil, This technique uses the positron emitter 18F-FDG (Fluorordesoxyglucose) as radiopharmaceutical which, ifannihilated, produces two gamma photons with energy of 0.511 MeV in the patient´s body,...
| Autores: | , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2019 |
| País: | Brasil |
| Institución: | Instituto Militar de Engenharia (IME) |
| Repositorio: | C&T (Rio de Janeiro. Online) |
| Idioma: | portugués |
| OAI Identifier: | oai:meiramattos.eceme.ensino.eb.br:article/2812 |
| Acceso en línea: | https://ebrevistas.eb.mil.br/CT/article/view/2812 |
| Access Level: | acceso abierto |
| Palabra clave: | PET/CT Fluordesoxiglucose Exposure Dose Equivalent Dose Fluordesoxiglicose Exposição Dose equivalente |
| Sumario: | Positron emission tomography (PET/CT) is a nuclear medicine procedure used for medical diagnosis. In Brazil, This technique uses the positron emitter 18F-FDG (Fluorordesoxyglucose) as radiopharmaceutical which, ifannihilated, produces two gamma photons with energy of 0.511 MeV in the patient´s body, thus becoming a radiation source at the diagnosis facility. This study presents a calculation methodology for the exposure rates, exposure and weekly equivalent dose due to the ionizing radiation from the patient, at a point, as a function of the time and activity of the radiopharmaceutical administered to the patient. The calculations consider the interaction of gamma radiation in the human body and air, and the concept of collision kerma for radiation dosimetry. Finally, a spreadsheet is suggested to optimize the calculations developed depending on the operational characteristics of a PET/CT facility. |
|---|