Zobrazeno 1 - 10
of 64
pro vyhledávání: '"Arnaldo Prata Mourão"'
Autor:
Mabel Bustos Flores, Arnaldo Prata Mourão, Samuel Queiroz Pelegrineli, Juraci Passos dos Reis Junior
Publikováno v:
Brazilian Journal of Radiation Sciences, Vol 10, Iss 3B (2022)
To estimate the dose that a patient's mammary tissue receives during mammographic screening, radiochromic film and objects simulators made of PMMA are used. This material interacts with X-rays in a similar way to tissue. Estimating the dose absorbed
Externí odkaz:
https://doaj.org/article/0d22591c38fa4af3a3d40b37eb2c24b2
Publikováno v:
Brazilian Journal of Radiation Sciences, Vol 10, Iss 3 (2022)
Computed tomography is the imaging technique that most contributes to increasing the population average dose. Head scanning protocols have a very high dose in patients due to the small thicknesses of the slice for 3D image reconstruction. In this sen
Externí odkaz:
https://doaj.org/article/89228301a5534816bc4db5cb99ead5e0
Autor:
Mauricio Gomez, Arnaldo Prata Mourão
Publikováno v:
Brazilian Journal of Radiation Sciences, Vol 9, Iss 1A (2021)
Phantoms can be used as quality control objects in computed tomography (CT) imaging and dosimetry in specific regions of interest. By means of phantom tests, alternatives can be created to optimize the acquisition protocols and thus modify the acquis
Externí odkaz:
https://doaj.org/article/50b5411750ca4506948d10da2b49e8e9
Autor:
Thessa Cristina Alonso, Vivian Carla Rocha Netto Bianchi, Leandro Abreu Vieira, Arnaldo Prata Mourão, Teógenes Augusto Da Silva
Publikováno v:
Brazilian Journal of Radiation Sciences, Vol 8, Iss 1 (2020)
The aim of this study was to verify the availability of CT scanners in the Brazilian territory, for the period 2010 to 2017, comparing the results with those indicated by the Brazilian legislation (Ordinance GM/MS Nº. 1101, 2002; Resolution RE Nº.
Externí odkaz:
https://doaj.org/article/820cb680fe01456b8ce70df89e241c30
Autor:
Viviana Montoya Ojeda, Mateus Fontes Quintão, Viviane Parisitto Marino, Luiz Gonzaga Vaz Coelho, Frederico Passos Marinho, Luciene das Graças Mota, Arnaldo Prata Mourão
Publikováno v:
Brazilian Journal of Radiation Sciences, Vol 7, Iss 2A (2019)
Gastroparesis is a disorder characterized by symptoms and evidence of delayed gastric emptying (GE) in the absence of mechanical obstruction. Scintigraphy has been considered a "gold standard" for measuring Gastric Emptying Time (GET) and retention p
Externí odkaz:
https://doaj.org/article/7f4b2ccb5cdb476f80045fff25b16472
Publikováno v:
Brazilian Journal of Radiation Sciences, Vol 7, Iss 2A (2019)
Images of Positron Emission Tomography (PET) associated with Computed Tomography (CT) have important diagnostic applications, mainly for oncology. These compound tomographic devices allow the overlapping of functional images obtained from the adminis
Externí odkaz:
https://doaj.org/article/7124f2e1f3524d1fa5f2ac3e43c2820a
Publikováno v:
Brazilian Journal of Radiation Sciences, Vol 7, Iss 1A (2019)
Non-invasive diagnosis methods based on x-ray attenuation, such as Computed Tomography (CT) has had since its discovery and the development of this technology, a rapid growth in radiology services. The quantity of dose deposited in patients, is still
Externí odkaz:
https://doaj.org/article/3338ea631df9417890947bda7c6b3d2d
Publikováno v:
Brazilian Journal of Radiation Sciences, Vol 7, Iss 1A (2019)
The dissemination of Computed Tomography (CT) scan has promoted a significant increase in the absorbed dose by patients due to the diagnosis. Therefore, it is indispensable to improve protocols, seeking smaller doses, without impairing the diagnostic
Externí odkaz:
https://doaj.org/article/a28793ddfb584328abc952c362cc872e
Publikováno v:
Brazilian Journal of Radiation Sciences, Vol 6, Iss 2B (2018)
Positron emission tomography (PET) associated with computed tomography (CT) allows the fusion of functional and anatomical images. When compared with other diagnostic techniques PET/CT subjects the patients to higher radiation dose levels because two
Externí odkaz:
https://doaj.org/article/5c52606692b2493c88804080352c4a92
Publikováno v:
Brazilian Journal of Radiation Sciences, Vol 6, Iss 2A (2018)
Computed Tomography (CT) has become an important tool to diagnose cancer and to obtain additional information for different clinical questions. However, CT scan usually requires a higher radiation exposure than a conventional radiography examination.
Externí odkaz:
https://doaj.org/article/cbc48fc6bc8a4bdc8ed036fe9dd3dc65