Search Results - "Prata Mourão, Arnaldo"
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Dosimetric study of pediatric PET/CT scan using different phantoms
Published in Radiation physics and chemistry (Oxford, England : 1993) (01-08-2020)“…PET/CT tests are becoming increasingly important imaging tools in the noninvasive evaluation and children monitoring with known or suspected malignant…”
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2
RADIOCHROMIC FILM CALIBRATION FOR DOSIMETRY IN CHEST CT SCANS
Published in Brazilian Journal of Radiation Sciences (30-04-2021)“…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,…”
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3
Dose reduction evaluation in radiosensitive tissues for head CT scans using two phantoms and bismuth eye shielding
Published in Brazilian Journal of Radiation Sciences (18-09-2022)“…Computed tomography is the imaging technique that most contributes to increasing the population average dose. Head scanning protocols have a very high dose in…”
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4
Evaluation of patient effective dose in a PET/CT test
Published in Applied radiation and isotopes (01-03-2019)“…The positron emission tomography (PET)/computed tomography (CT) technique generates high doses in patients because two radiodiagnostic modalities are used in a…”
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5
Dosimetry in CR mammography using radiochromic film
Published in Brazilian Journal of Radiation Sciences (04-12-2022)“…To estimate the dose that a patient's mammary tissue receives during mammographic screening, radiochromic film and objects simulators made of PMMA are used…”
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COMPARATIVE DOSIMETRIC STUDY IN CHEST COMPUTED TOMOGRAPHY USING PHANTOMS
Published in Brazilian Journal of Radiation Sciences (28-01-2019)“…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…”
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7
Study of dosimetry in CT using head phantom
Published in Brazilian Journal of Radiation Sciences (28-01-2019)“…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,…”
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8
Analysis of lenses absorbed dose in head CT scan with the use of bismuth shielding
Published in Brazilian Journal of Radiation Sciences (19-07-2018)“…Computed Tomography (CT) has become an important tool to diagnose cancer and to obtain additional information for different clinical questions. However, CT…”
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9
Computer Tomography Scanners in Brazil (2010-2017)
Published in Brazilian Journal of Radiation Sciences (22-03-2020)“…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…”
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10
Breast phantom made of acrylic slabs for tests in mammography DR
Published in Applied radiation and isotopes (01-10-2022)“…The development of a breast phantom with realistic features that is simple and cheap to produce continues to be a challenge. Most commercial phantoms are…”
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11
Evaluation of gastric emptying by means of scintigra-phy using different test meals
Published in Brazilian Journal of Radiation Sciences (25-02-2019)“…Gastroparesis is a disorder characterized by symptoms and evidence of delayed gastric emptying (GE) in the absence of mechanical obstruction. Scintigraphy has…”
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12
Patient dose reduction by changing the amount of 18F-FDG radiopharmaceutical injected
Published in Brazilian Journal of Radiation Sciences (25-02-2019)“…Images of Positron Emission Tomography (PET) associated with Computed Tomography (CT) have important diagnostic applications, mainly for oncology. These…”
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13
Comparação da dose absorvida de dois protocolos de varredura tomográfica em exame de PET/CT
Published in Brazilian Journal of Radiation Sciences (08-10-2018)“…Positron emission tomography (PET) associated with computed tomography (CT) allows the fusion of functional and anatomical images. When compared with other…”
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14
Considerações radiodosimétricas da braquiterapia ocular com iodo-125 e rutênio/ródio-106
Published in Radiologia brasileira (01-02-2009)“…OBJETIVO: Analisar, por meio de um modelo computacional da região ocular, as características da distribuição da dose utilizando placas contendo iodo-125 e…”
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15
Validação de um modelo computacional de acelerador linear VARIAN CLINAC 2100 utilizando o código EGSnrc para utilização em dosimetria de pequenos campos
Published in Brazilian Journal of Radiation Sciences (28-01-2018)“…Neste trabalho foi empregado o Método de Monte Carlo para a simulação de campos clínicos de radioterapia que serão posteriormente utilizados para a calibração…”
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16
Estimativa dos valores de MSAD em procedimentos de tomografia computadorizada utilizando filmes radiocrômicos
Published in Radiologia brasileira (01-04-2013)“…OBJETIVO: Verificar a viabilidade de filmes radiocrômicos como um dosímetro alternativo para estimativa da dose média em cortes múltiplos a partir dos perfis…”
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17
Dosimetry of patients submitted to cerebral PET/CT for the diagnosis of mild cognitive impairment
Published in Radiologia brasileira (01-11-2014)“…The present study was aimed at evaluating the effective radiation dose in patients submitted to PET/CT for the diagnosis of mild cognitive impairment. TLD-100…”
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18
Dosimetria de pacientes submetidos a exames de PET/CT cerebral para diagnóstico de comprometimento cognitivo leve
Published in Radiologia brasileira (01-12-2014)“…Objetivo: O objetivo deste trabalho é avaliar a dose em pacientes submetidos a PET/CT para diagnóstico de comprometimento cognitivo leve. Materiais e Métodos:…”
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19
Study for pediatric protocol optimization in chest CT scans
Published in Brazilian Journal of Radiation Sciences (28-01-2019)“…Radiological exams are increasingly used in clinic for diagnostic analysis of different types of pathologies. These tests are associated with a dose that is…”
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20
Analysis of thyroid absorbed dose in cervical CT scan with the use of bismuth shielding
Published in Brazilian Journal of Radiation Sciences (19-02-2019)“…The Computed Tomography (CT) has become an important tool to diagnose cancer and to obtain additional information for different clinical questions. Today, it…”
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