摘要
利用波形积分法进行信号采集,得出了PET探测器的2-D位置图,并使用分水岭算法计算了查找表。像素尺寸为2.0mm和1.6mm的10×10LYSO以及1.6mm的12×12晶体阵列探测器与光电倍增管直接耦合。基于1GHz采样频率的ADQ同步数据采集卡,采用波形积分法获得了最佳的PET探测器2-D位置图。实验显示,像索为2.0mm.1.6mm的10×10LYSO晶体以及1.6mm的12×12的PET探测器,单个晶体条的位置区分度分别达到0.28mm,0.20mm和0.19mmFWHM,平均峰谷比平均值分别为3.23.4.26和3.46。LYSO阵列晶体PET探测器模块可用于PET整机系统。
The waveform integration method is used to acquire the signal.The 2-D position map of the PET detector is obtained,and the look-up table is calculated using the watershed algorithm.A 10×10 LYSO with a pixel size of 2.0 mm and 1.6 mm and a 1.6 mm 12×12 crystal array detector are directly coupled to the photomultiplier tube.Based on the 1 GHz sampling frequency ADQ synchronous data acquisition card,the optimal PET detector 2-D position map was obtained by waveform integration method.Experiments show that 10 × 10 LYSO crystals with 2.0 mm,1.6 mm pixels,and 12×12 PET detectors with 1.6 mm,the positional discrimination of individual crystal strips reaches 0.28 mm,0.20 mm,and 0.19 mm F WHM,the average peak-to-valley ratio is3.23,4.26,and 3.46,respectively.The LYSO array crystal PET detector module can be used in the construction of PET system..
作者
李英帼
黄川
王天泉
范亚明
佟林格
尹永智
李公平
LI Ying-guo;HUANG Chuan;WANG Tian-quan;FAN Ya-ming;TONG Lin-ge;YIN Yong-zhi;LI Gong-ping(School of Nuclear Science and T echnology,Lanzhou University,Lanzhou 730000,China)
出处
《核电子学与探测技术》
CAS
北大核心
2020年第2期346-352,共7页
Nuclear Electronics & Detection Technology
基金
国家自然科学基金(11875156,11765003)
甘肃省引导科技创新发展(20182X-07)资助。
