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Ga-68 activity calibrations for nuclear medicine applications in Cuba

Abstract : The realization and dissemination of the Ga-68 activity measurement unit in Cuba is presented. Firstly, the implementation of the Triple to Double Coincidence Ratio (TDCR) method is described for the calibration of the activity concentration of a Ga-68 solution using a Hidex (TM) commercial liquid scintillation counter and a FORTRAN code developed for the calculation of the Ga-68 counting efficiencies in the given measurement system. The relative expanded uncertainty (k = 2) associated with the Ga-68 activity concentration obtained with the TDCR method is equal to 2%. With the aim to validate this measurement uncertainty estimate, the method is also applied to an Amersham standard solution of Na-22 - a positron emitter with a similar decay mode to the Ga-68 disintegration scheme from the point of view of type of emitted particles detected in the measurement system. The observed difference between the measured Na-22 activity concentration by the TDCR method and the corresponding reference value traceable to NIST is equal to 0.16%.
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https://hal-cea.archives-ouvertes.fr/cea-01803822
Contributor : Léna Le Roy <>
Submitted on : Thursday, May 31, 2018 - 7:55:34 AM
Last modification on : Monday, February 10, 2020 - 6:12:32 PM

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P. Oropesa Verdecia, L. Garcia Rodriguez, R. A. Serra Aguila, Y. Moreno Leon, Y. Jenez Magana, et al.. Ga-68 activity calibrations for nuclear medicine applications in Cuba. Applied Radiation and Isotopes, Elsevier, 2018, 134 (SI), pp.112-116. ⟨10.1016/j.apradiso.2017.11.010⟩. ⟨cea-01803822⟩

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