用4πβ-γ软件符合系统对68Ga进行标准化

2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record (NSS/MIC) Pub Date : 2012-10-01 DOI:10.1109/NSSMIC.2012.6551106

M. F. Koskinas, F. W. Lacerda, I. M. Yamazaki, F. Toledo, M. N. Takeda, M. S. Dias

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引用次数: 1

摘要

68Ga是一种短半衰期正电子发射体，用于PET(正电子发射断层扫描)的标准化研究。68Ga标准化在一个4π三重β-γ符合系统中进行，该系统由一个4π几何形状的薄窗气体流动比例计数器(PC)与一个NaI(TI)闪烁体和一个HPGe晶体耦合组成，用于伽马射线检测。数据采集由IPEN-CNEN/SP的核计量实验室(Laboratory de Metrologia Nuclear - LMN)开发的软件重合系统(SCS)进行。将实验结果与蒙特卡罗模拟结果相结合，采用协方差矩阵法进行多次曲线拟合，得到最终结果。

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Standardization of 68Ga by means of a 4πβ-γ Software Coincidence System

The present work aims the standardization of 68Ga, a positron emitter of short half-life used in PET (Positron Emission Tomography). The 68Ga standardization was performed in a triple 4πβ-γ coincidence system that consists of a thin window gas-flow proportional counter (PC) in 4π geometry coupled to a NaI(TI) scintillator and a HPGe crystal, for gamma-ray detection. The data acquisition was carried out by means of a Software Coincidence System (SCS) developed at the Nuclear Metrology Laboratory (Laboratorio de Metrologia Nuclear - LMN) at the IPEN-CNEN/SP. The final results were obtained from a multiple curve fitting applying a covariance matrix methodology combining experimental results with those determined by the Monte Carlo simulation.

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2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record (NSS/MIC)

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