Radiation absorbed doses to organs outside the radiation therapy treatment beam can be significant and therefore of clinical interest. Two sets of out-of-beam measurements were performed measuring the leak dose and the scattered dose, at 5 points within the accelerator components (accelerator tube and co...
To ensure a reliable verification of a radiation detector, the right parameters for this response verification must be determined and a specific characterization on the detectors of interest must be performed. These were the main pillars of this study, where four Geiger-Müller at the University of Costa...
Monitoreo de Radiación/instrumentación,
Calibración,
Ciclotrones,
Radioisótopos de Cesio,
Radiometría/métodos,
Radiometría/instrumentación,
Monitoreo de Radiación/métodos,
Universidades,
Costa Rica,
Exposición a la Radiación/prevención & control,
Exposición a la Radiación/análisis
This study presents the characterization of an X-ray irradiator through dosimetric tests, which confirms the actual dose rate that small animals and cells will be exposed to during radiobiological experiments. We evaluated the linearity, consistency, repeatability, and dose distribution in the positions ...
ABSTRACT Objective: The aim of this study was to compare the equivalent and effective doses of different digital radiographic methods (panoramic, lateral cephalometric and periapical) with cone-beam computed tomography (CBCT). Methods: Precalibrated thermoluminescent dosimeters were placed at 24 locat...
No Laboratório de Calibração de instrumentos do IPEN os monitores portáteis são calibrados com radiação gama de (60)Co e (137)Cs; no entanto, sabe-se que muitos destes instrumentos são utilizados para medidas em campos de radiação X até mesmo na faixa em que apresentam dependência energética...
Se estudió un grupo de 121 niños por medio de video-cistometría sincrónica usando un combinador óptimo de imágenes (4) con un promedio de edad de 9.32 años, venidos de todo el país, especialmente la zona central. Para efectos de orden se catalogan las patologías en: -Incontinencia de orina. -Inc...
PURPOSE--To provide data for professional specialized in these subjects, contributing to minimize their exposure radiation dosage. METHODS--We made a radiometric survey using a ionization chamber to check the exposure rate in several places in the examination's room to different operational conditions of...
A idéia de se utilizar eletreto em detecçäo e dosimetria das radiaçöes ionizantes foi patenteada em 1954. Devido a baixa sensibilidade a radiaçäo dos eletretos existentes, näo houve uma utilizaçäo prática até os trabalhos de Fabel e Henisch, que usaram folhas de TEFLON e PVDF, encontrando sen...
Se presenta un equipo diseñado por los autores que permite disponer de la visión simultánea de las curvas urodinámicas y de la imagen radiografica del tracto urinario inferior. Tiene la ventaja de un costo reducido en comparación a los equipos comerciales...
