A MONTE-CARLO PROGRAM FOR THE SIMULATION OF SCINTILLATION CAMERA CHARACTERISTICS
A MONTE-CARLO PROGRAM FOR THE SIMULATION OF SCINTILLATION CAMERA CHARACTERISTICS
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DOI：
10.1016/0169-2607(89)90111-9
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发表时间：
1989-08-01
影响因子：
6.1
通讯作者：
STRAND, SE
中科院分区：
文献类型：
--
作者：
LJUNGBERG, M;STRAND, SE
有必要为光子成像系统的重要参数的评价数学建模。研制了一个模拟医学成像核探测器的蒙特卡罗程序。可以为探测器、盖和体模选择不同的材料。可以模拟圆柱形、球形、矩形和更复杂的幻象和源形状。光电，非相干，相干相互作用和对生产进行了模拟。可以计算不同的探测器参数，例如由于闪烁光发射的有限衰减时间而导致的能量脉冲高度分布和脉冲堆积。通过将赋予的能量与能量相关的高斯函数卷积来模拟系统的能量分辨率。可以模拟检测器中事件的质心的图像矩阵。模拟不同的准直器允许研究的空间分辨率和灵敏度。我们的结果与实验数据和其他已发表的结果进行了比较，显示出良好的协议。的有用性的蒙特卡罗代码的闪烁相机系统，固定以及SPECT（单光子发射计算机断层扫描）系统中的重要参数的准确模拟，已被证明。
There is a need for mathematical modelling for the evaluation of important parameters for photon imaging systems. A Monte Carlo program which simulates medical imaging nuclear detectors has been developed. Different materials can be chosen for the detector, a cover and a phantom. Cylindrical, spherical, rectangular and more complex phanton and source shapes can be simulated. Photoelectric, incoherent, coherent interactions and pair production are simulated. Different detector parameters, e.g. the energy pulse-height distribution and pulse pile-up due to finite decay time of the scintillation light emission, can be calculated. An energy resolution of the system is simulated by convolving the energy imparted with an energy-dependent Gaussian function. An image matrix of the centroid of the events in the detector can be simulated. Simulation of different collimators permits studies of spatial resolution and sensitivity. Comparisons of our results with experimental data and other published results have shown good agreement. The usefulness of the Monte Carlo code for the accurate simulation of important parameters in scintillation camera systems, stationary as well as SPECT (single-photon emission computed tomography) systems, has been demonstrated.