Rollback reconstruction for TDC enhanced perfusion imaging  

作　　者：Jia-Shun Liu Yi-Kun Zhang Hui Tang Li-Bo Zhang Ben-Qiang Yang Ying Yan Li-Min Luo Yang Chen 

机构地区：[1]Laboratory of Image Science and Technology,Southeast University,Nanjing 210096,China [2]Department of Radiology,General Hospital of the Northern Theater of the Chinese People’s Liberation Army,Shenyang 110016,China [3]Department of Radiotherapy,General Hospital of the Northern Theater of the Chinese People’s Liberation Army,Shenyang 110016,China [4]Centre de Recherche en Information Biomedicale SinoFrancais(LIA CRIBs),35000 Rennes,France

出　　处：《Nuclear Science and Techniques》2021年第8期23-33,共11页核技术（英文）

基　　金：supported in part by the State’s Key Project of Research and Development Plan (Nos. 2017YFC0109202,2017YFA0104302);the National Natural Science Foundation (No.61871117);Science and Technology Program of Guangdong (No.2018B030333001)。

摘　　要：Tomographic perfusion imaging is a significant imaging modality for stroke diagnosis.However,the low rotational speed of the C-arm(6–8 s per circle)is a challenge for applying perfusion imaging in C-arm cone beam computed tomography(CBCT).Traditional reconstruction methods cannot remove the artifacts caused by the slow rotational speed or acquire enough sample points to restore the time density curve(TDC).This paper presents a dynamic rollback reconstruction method for CBCT.The proposed method can improve the temporal resolution by increasing the sample points used for calculating the TDC.Combined with existing techniques,the algorithm allows slow-rotating scanners to be used for perfusion imaging purposes.In the experiments,the proposed method was compared with other dynamic reconstruction algorithms based on standard reconstruction and the temporal interpolation approach.The presented algorithm could improve the temporal resolution without increasing the X-ray exposure time or contrast agent.

关 键 词：Rollback reconstruction CBCT Time resolution Time density curve 

分 类 号：R743.3[医药卫生—神经病学与精神病学]