基于并行采样的PET快电子脉冲数字化研究  

Digitalizing of the fast electronic pulse in PET based on parallel sampling

作　　者：王玥[1] 胡子祥[1] 宗慎言[1] 项士海[1] 王军博[1] 刘军强[1] 孙航[1] 吴长龙[1] 边钺岩[1] 

机构地区：[1]东北大学中荷生物医学与信息工程学院,沈阳110819

出　　处：《北京生物医学工程》2013年第2期186-190,214,共6页Beijing Biomedical Engineering

基　　金：国家大学生创新计划(110177)资助

摘　　要：目的将并行采样方法引入正电子发射计算机断层扫描装置(positron emission tomography,PET)探测器输出的快电子脉冲的数字化过程,获取蕴含时间和能量信息的数字脉冲,同时,降低高速数据采集系统的成本。方法依照基于并行采样的PET快电子脉冲数字化方法,以51微控制器为主控芯片、两片ADC0832为模数转换芯片、一块LCD为显示器成功构建具有并行采样功能的实验系统。结果主控芯片成功驱动两片ADC和一块LCD,实现了并行采样。结论该方法在PET快电子脉冲的数字化方面具有可行性。Objective The parallel sampling method is introduced into the digitalizing of the fast electronic pulse from the detector in positron emission tomography （PET）to digitalize the signal exactly and reduce the cost of high-speed data acquisition system. Methods One parallel sampling system is developed successfully with two ADCs connected to the MCS-51microprocessor and one piece of LCD served as the display device,according to the method of digitalizing the pulse from the PET detector via parallel sampling. Results The main control chip drives the two ADCs and the LCD successfully. The analogue signal is converted into digital signal and recorded via parallel sampling. Conclusions This method is feasible in digitalizing the pulse from the PET detector.

关 键 词：正电子计算机断层装置 探测器 快电子脉冲 数字化 并行采样 

分 类 号：R318.04[医药卫生—生物医学工程]