A non-invasive technique named positron emission particle tracking (PEPT) is used to study the dynamics of mineral particles found in froth flotation. High frequency tracking is required to fully resolve turbulent flow paths with highly fluctuating velocity components. Tracking frequency is also called “location rate”, which is the number of tracked locations per second. A time interpolation algorithm was implemented on the raw data of a PEPT measurement to increase the effective location rate of PEPT data. The algorithm was validated with Monte-Carlo simulations of the Siemens ECAT “EXACT3D” HR++ PET scanner at PEPT Cape Town (University of Cape Town). The paths generated from the simulated data with improved timing information had an order of magnitude lower uncertainty in both the position and time components of a location measurement. The algorithm was then applied to PEPT experiments with freely moving particles in a laboratory scale flotation vessel to demonstrate the impact of tracking with higher fidelity.

中文翻译：

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提高泡沫浮选的正电子发射粒子跟踪 （PEPT） 测量的定位率


一种称为正电子发射粒子跟踪 （PEPT） 的非侵入性技术用于研究泡沫浮选中发现的矿物颗粒的动力学。需要高频跟踪才能完全解析速度分量剧烈波动的湍流路径。跟踪频率也称为 “location rate”，即每秒跟踪的位置数量。对 PEPT 测量的原始数据实施了时间插值算法，以提高 PEPT 数据的有效定位率。该算法在 PEPT 开普敦大学 PEPT 的 Siemens ECAT “EXACT3D” HR++ PET 扫描仪的蒙特卡洛模拟中得到了验证。从具有改进时序信息的仿真数据生成的路径在位置测量的位置和时间分量中具有较低的一个数量级的不确定性。然后将该算法应用于实验室规模浮选容器中自由移动颗粒的 PEPT 实验，以证明以更高保真度跟踪的影响。