نتایج جستجو برای: high purity ge detector
تعداد نتایج: 2124262 فیلتر نتایج به سال:
OBJECTIVES In nuclear medicine studies, gallium-68 ((8)Ga) citrate has been recently known as a suitable infection agent in positron emission tomography (PET). In this study, by applying an in-house produced (68)Ge/(68)Ga generator, a simple technique for the synthesis and quality control of (68)Ga-citrate was introduced; followed by preliminary animal studies. METHODS (68)GaCl3 eluted from t...
One important factor in using an High Purity Germanium (HPGe) detector is its efficiency that highly depends on the geometry and absorption factors, so that when the configuration of source-detector geometry is changed, the detector efficiency must be re-measured. The best way of determining the efficiency of a detector is measuring the efficiency of standard sources. But considering the fact t...
A 68 Ge source can be used to calibrate the positron detection eeciency of a liquid scintillation neutrino detector. A method to dissolve radioactive 68 Ge in pseudocumene-based liquid scintillator is described. The homogeneity of the source distribution has been studied and results for two Ge compounds are discussed. Light yield and light attenuation length of the liquid scintillator are not a...
To validate the accuracy and precision of the Genie2000 Cascade Summing Correction method, over 800 archived measurements were made on calibrated sources (filter paper, 20cc liquid scintillation vial, 400 ml beaker and Marinelli beaker) containing cascading (Y and Co) and non-cascading isotopes. These measurements used 133 different high purity germanium detectors that were characterized for us...
4-[F]Fluoroiodobenzene ([F]FIB) is a versatile building block in F radiochemistry used in various transition metalmediated C–C and C–N cross-coupling reactions and [F]fluoroarylation reactions. Various synthesis routes have been described for the preparation of [F]FIB. However, to date, no automated synthesis of [F]FIB has been reported to allow access to larger amounts of [F]FIB in high radioc...
We synthesized 18F-FDG by using an automated synthetic apparatus "FDG MicroLab" (GE Medical Systems) which produces 18F-FDG by a solid phase 18F-fluorination. Its quality and reproducibility were evaluated in order to assess feasibility of the apparatus for routine clinical production of 18F-FDG. For 5 consecutive 18F-FDG synthesis, target irradiation was carried out at 15 microA for 60 min. 18...
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