单片闪烁相机空间响应的B样条参数化
B-spline parameterization of spatial response in a monolithic scintillation camera
摘要：
提出了闪烁相机中光响应函数（LRF）参数化的框架。它是基于近似的测量或模拟的光传感器响应与均匀三次B样条或其张量积的加权和。以这种方式表示的LRF是平滑的，计算成本低，比非参数替代方案需要更少的计算机内存。通过线性最小二乘法以简单的方式找到参数。开发了几种允许降低存储和处理能力要求的技术。开发了一个软件库，用于用样条函数拟合模拟和测量的光响应，并将其集成到一个开放源代码软件包ANTS 2中，该软件包是为Anger相机型探测器的模拟和数据处理而设计的。
英文摘要：
A framework for parameterization of the light response functions (LRFs) in a scintillation camera is presented. It is based on approximation of the measured or simulated photosensor response with weighted sums of uniform cubic B-splines or their tensor products. The LRFs represented in this way are smooth, computationally inexpensive to evaluate and require much less computer memory than non-parametric alternatives. The parameters are found in a straightforward way by the linear least squares method. Several techniques that allow to reduce the storage and processing power requirements were developed. A software library for fitting simulated and measured light response with spline functions was developed and integrated into an open source software package ANTS2 designed for simulation and data processing for Anger camera type detectors.
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