Activity Measurements in Brazilian Nuclear Medicine Services
نویسندگان
چکیده
A. Iwahara, A. E. de Oliveira, L. Tauhata, C. J. da Silva and R. T. Lopes Laboratório Nacional de Metrologia das Radiações Ionizantes-Instituto de Radioproteção e DosimetriaComissão Nacional de Energia Nuclear/Av. Salvador Allende, s/n°, Recreio Rio de Janeiro – Brazil CEP 22780 160 Laboratório de Instrumentação Nuclear-Coordenação dos Programas de Pós-Graduação de EngenhariaUniversidade Federal do Rio de Janeiro – PO Box 68509 – Rio de Janeiro – Brazil CEP 21945 970
منابع مشابه
Assessment of molybdenum breakthrough levels in molybdenum-99/technetium-99m generators: One year experience at NIMRA Jamshoro Pakistan
Background: Technetium-99m radioisotope is the backbone of any nuclear medicine institute. This radioisotope is acquired by the elution of Molybdenum-99/Technetium-99m generator which emits 141 keV gamma ray and having 6.04 hour half-life. Occasionally the contents of Molybdenum-99 may mix up with elute, which may affect image quality and patients may receive higher doses than recommended. This...
متن کاملComparative measurements in dose calibrators and a gamma-ray spectrometer.
Specific activity results of (51)Cr, (67)Ga, (99m)Tc and (201)Tl radioactive solutions, measured in different dose calibrators located at nuclear medicine services and in a calibrated HPGe gamma spectrometer, were compared. The HPGe spectrometer was calibrated in a well defined geometry by means of (60)Co, (133)Ba, (152)Eu, (166m)Ho and (241)Am sources, previously standardized in a 4pibeta-gamm...
متن کاملDetermination of absorbed dose of organs (thyroid, sternum, cervical vertebra) in thyroid cancer patients following radioiodine therapy
Introduction: In patients with thyroid carcinoma, radiation absorbed doses of the thyroid and surrounding tissues is important to weigh risk and benefit considerations. In nuclear medicine, the accuracy of absorbed dose of internally distributed radionuclides is estimated by different methods such as MIRD and direct method using TLD. The aim of this study is using T...
متن کاملMonitoring of iodine-125 and iodine-131 in thyroid of individuals in nuclear medicine centers of North West provinces of Iran
Background: Due to volatility of radioactive iodine solutions, usually internal exposure would occur in personnel that are working in nuclear medicine centers. The activities in the thyroid of individual s who work in nuclear medicine centers of North West provinces of Iran were measured using NaI (Sodium Iodide) detectors. In every center, nearly 40 - 500 mCi of 131 I and 50 - 600 μ Ci of 125 ...
متن کاملI-124 pre-therapy dosimetry for the treatment of differentiated thyroid cancer: A single center experience
Introduction:The maximum tolerable activity (MTA) of I-131 in radioiodine therapy is an established surrogate quantity to ensure that the therapeutic activity does not produce severe damages to the bone marrow and lung. The aim of this study was to estimate the MTAs for high-risk patients using I-124 pre-therapy dosimetry and to compare the results with published literature. <...
متن کامل