断层屏蔽SPECT的性能和蒙特卡罗模拟  

System characteristics of slice collimator for SPECT imaging and Monte Carlo simulation

作　　者：张奇玮[1] 马加一[1] 刘庆伟[1] 赵经武[1] 

机构地区：[1]南京大学物理系,南京210093

出　　处：《核电子学与探测技术》2007年第4期773-777,782,共6页Nuclear Electronics & Detection Technology

摘　　要：断层屏蔽具有灵敏度高、采集时间短的特点,在临床应用中有很好的前景。通过物理模型和蒙特卡罗模拟计算,探讨了断层屏蔽SPECT的灵敏度、空间分辨率和信噪比,并提出不同半径的数据分组可以有效和直观的进行图像判别,便于图像重建。The slice collimator for SPECT imaging has the advantage of high sensitivity and short detec- tion time , so it will be wide applied to clinic medicine. In this paper, sensitivity , spatal resolution and signal noise ratio are discussed by physical model and Monte Carlo simulation. Images can be efficiently and intuitively distinguished by the data groupings of different radius that are put forward in this paper. This method is in favor of image reconstruction.

关 键 词：断层屏蔽 蒙特卡罗 MCNP 

分 类 号：R445.5[医药卫生—影像医学与核医学]