列表模式采集在18F-FDG PET/CT采集时长优化中的初步应用

冯洪波; 张延军; 张硕

中国临床医学影像杂志 ›› 2013, Vol. 24 ›› Issue (1) : 32-34.

论著

列表模式采集在18F-FDG PET/CT采集时长优化中的初步应用

冯洪波，张延军，张硕

作者信息 +

The application of list-mode in 18F-FDG PET/CT emission scan duration optimisation

FENG Hong-bo, ZHANG Yan-jun, ZHANG Shuo

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文章历史 +

摘要

目的：探讨应用列表采集模式优化18F-FDG PET/CT采集时长的可行性。方法：共22例常规接受PET/CT检查患者入选本研究。患者按照7.4 MBq/kg的标准注射显像剂，显像仪器为西门子Biograph 64 PET/CT。选择肝脏作为靶器官，先行CT扫描，然后行180 s列表模式PET采集。通过设置不同的采集时间长度参数对原始数据重建静态图像，获得40~180 s间8个时长条件下的PET图像。选择肝脏最大层面、无病灶区域勾画直径为4 cm的感兴趣区，测量感兴趣区的SUVmax及SUVmean。所有统计分析使用SPSS 16完成。结果：SUVmax与SUVmean均呈现出随采集时间增加而降低的变化趋势，在采集时长≥80 s的情况下，各组间SUVmax与SUVmean均无显著差异，与常规PET/CT采集获得图像亦无显著差异。结论：优化的采集时长在保证图像质量基础上显著提高了检查效率。列表模式采集能够动态反映采集时长与图像质量间的关系，可以作为确定18F-FDG PET/CT最优采集时长的有效方法。

Abstract

Objective: Discussing the feasibility of optimizing the 18F-FDG PET/CT emission scan duration by using the list-mode acquisition. Method: Both the list-mode and sino 18F-FDG PET/CT examinations were performed on 22 patients with a weight-based injected activity(7.4 MBq/kg). PET images of different emission scan durations from 40 s to 180 s were obtained by the list-mode raw data reconstruction. SUVmax and SUVmean of the liver ROIs of different scan durations were analyzed by using SPSS 16. Result: SUVmax and SUVmean declined as the acquisition duration increased. No significant differences were found among the groups which emission scan durations were more than 80 s. Conclusion: Optimized scan duration improved the examination efficiency. The list-mode acquisition which could reflect the dynamic relationship of emission scan duration and image quality would be an effective method to determine the suitable scan duration.

导出引用

冯洪波;张延军;张硕. 列表模式采集在18F-FDG PET/CT采集时长优化中的初步应用[J]. 中国临床医学影像杂志. 2013, 24(1): 32-34

FENG Hong-bo;ZHANG Yan-jun;ZHANG Shuo. The application of list-mode in 18F-FDG PET/CT emission scan duration optimisation[J]. Journal of China Clinic Medical Imaging. 2013, 24(1): 32-34

中图分类号： Ｒ817.4