JONAS OLIVEIRA DA SILVA
6 resultados
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Artigo IPEN-doc 20030 Intensity variation study of the radiation field in a mammographic system using thermoluminescent dosimeters TLD-900 (CaSOsub(4):DY)2014 - CORREA, E.L.; SILVA, J.O.; VIVOLO, V.; POTIENS, M.P.A.; DAROS, K.A.C.; MEDEIROS, R.B.Artigo IPEN-doc 19573 Quality control tests in a mammographic unit using a homemade ionization chamber2013 - SILVA, JONAS O.; CORREA, EDUARDO I.; VIVOLO, VITOR; POTIENS, MARIA da P.A.; CALDAS, LINDA V.E.An important modality of radiation diagnosis is the mammography that is a diagnostic tool to detect breast cancer in an initial stage as well as the tumor localization for treatment. It is essential that the mammographic unit follows an accurate quality control program to assure the image quality, and patient and staff radiation protection. The ionization chambers play an important role in the quality control of mammographic units, because they are the reference detectors for calibration purposes. In this work a homemade double faced ionization chamber developed at IPEN, Brazil, was used to perform some quality control tests in a mammographic unit. All results obtained were within international recommendations.Artigo IPEN-doc 18285 Characterization of a new ionization chamber in radiotherapy beams: angular dependence and variation of response with distance2012 - SILVA, JONAS O.; CALDAS, LINDA V.E.Artigo IPEN-doc 18288 Evaluation of the voltage quantities measured with different noninvasive meter for quality control at a calibration laboratory2012 - VIVOLO, VITOR; NEVES, LUCIO P.; PERINI, ANA P.; SILVA, JONAS O.; LUCENA, RODRIGO F.; POTIENS, MARIA da P.A.; CALDAS, LINDA V.E.Artigo IPEN-doc 18289 A double faced ionization chamber for quality control in diagnostic radiology beams2012 - SILVA, JONAS O.; CALDAS, LINDA V.E.Artigo IPEN-doc 19820 Characterizations tests of a homemade ionization chamber in mammography standard radiation beams2014 - SILVA, J.O.; NONATO, F.B.C.; CALDAS, L.V.E.