CT用于PET衰减校正技术的研究进展  

Advances in CT-based attenuation correction techniques for PET

作　　者：柴培[1,2] 聂彬彬[1] 叶婷[1,2] 武丽伟[1,2] 单保慈[1] 

机构地区：[1]中国科学院高能物理研究所中国科学院核分析技术重点实验室,北京100049 [2]中国科学院研究生院,北京100049

出　　处：《中国医学影像技术》2010年第8期1576-1578,共3页Chinese Journal of Medical Imaging Technology

基　　金：国家重点基础研究发展计划("973"计划)项目(2006CB705705);国家自然科学基金(30970768);国家高技术研究发展计划("863"计划)项目(2006AA020803)

摘　　要：利用CT对PET进行衰减校正(CTAC)具有扫描时间短、噪声低等优势。实现CTAC的关键在于准确地将X线衰减系数转换为511 keV射线的衰减系数。目前的转换算法主要包括比例缩放法、分割法、双值组合法、双线性法和双能CT法。本文详细介绍这些算法的原理,综述各种算法的优缺点,并对未来CTAC算法的发展动态进行评述。The use of CT images for CT-based attenuation correction（CTAC） of PET data results in the decrease of overall scanning time and a noise-free attenuation map.The key of this approach is to accurately convert the linear attenuation coefficients obtained from the CT scan to those correspondingly to the 511 keV.Several conversion strategies have been developed,including scaling,segmentation,hybrid,bilinear and dual-energy CT methods.In this paper,the principles of these various algorithms were described and the advantages and disadvantages of them were analyzed,the future development in CTAC algorithms were reviewed.

关 键 词：正电子发射型体层摄影术 衰减校正 双线性 放射摄影术 双能扫描投影 

分 类 号：R814[医药卫生—影像医学与核医学]