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| Activity Measurement of 18F with TDCR-LS Methods |
| LIU Hao-ran1,LIU Jia-cheng2,LIANG Jun-cheng2,YANG Yuan-di2,YUAN Da-qing1 |
1.China Institute of Atomic Energy, Beijing 102413, China
2.National Institute of Metrology, Beijing 100013, China |
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Abstract As an important short half-life radionuclide,the 18F is widely used in nuclear medicine for positron emission tomography(PET).It disintegrates to 18O by β+ emission(96.86%)and electron capture(3.14%).Since the very high detection efficiency of β+ decay branch in the liquid scintillation counter,the radioactive solution of 18F has been standardized by TDCR-LS method.The results indicate that the detection efficiency of β+ emission in Ultima GoldTM AB cocktail is close to 1 and the uncertainty of 18F by TDCR-LS method is equal to 0.6%(k=2).
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［1］DDEP-Decay Data Evaluation Project［DB］,http://www.nucleide.org/DDEP_WG/Nuclides/F-18_tables.
［2］Broda R,Pochwalski K.The enhanced triple to double coincidence ratio(ETDCR)method for standardization of radio-nuclides by liquid scintillation counting［J］.Nucl Instrum Methods,1992,A312:85-89.
［3］Broda R,Cassette P,Kossert K.Radionuclide metrology using liquid scintillation counting［J］.Metrologia,2007,44:36-52.
［4］Grau Carles A.New Methods for the Determination of beta Spectra Shapefactor Coefficients［J］,Appl Radiat Isot,1995,46(2):125-128.
［5］Birks J B.The Theory and Practice of Scintillation Counting［M］,London:Pergamon Press,1960,186-187.
［6］吴永乐,液闪TDCR方法测量氚水活度［D］.北京:中国原子能科学研究院, 2010.
［7］Broda R,Maletka K,et al.Study of the influence of the LS-cocktail composition for the standardization of radionuclides using the TDCR mode1［J］.Appl Radiat Isot,2002,56:285-289.
［8］Miguel R,Eduardo G T,Leonor R B.Standardization of 18F by coincidence and LSC methods［J］.Appl Radiat Isot,2006,64:1192-1202.
［9］梁珺成,应用CIEMAT/NIST方法测量轨道电子俘获核素活度的研究［D］.北京:中国计量科学研究院,2008.
［10］Bouchard J,Cassette P.MAC3:an electronic module for the processing of pulses delivered by a three photomultiplier liquid scintillation counting system［J］.Appl.Radiat.Isot.2000,52:669-672.
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2011, Vol. 32 
