4Schaefer PW, Roceatagliata L,Ledezma C,et al.First-pass quantitative CT perfusion identifies thresholds for salvageable penumbra in acute stroke patients treated with intra-arterial therapy[J]. ANJR,2006,27(1 ):20-25.
5Teksam M,Cakir B,Cokum M.CT perfusion imaging in the early diagnosis of acute stoke [J].Diagn Inter Radiol,2005,11(1):202-205.
6Unger E,Littlefield J,Gado M,et al. Water content and water structure in CT and MRI signal changes: possible influence in detection of early stroke[J]. ANJR,1988,9(3):687-691.