[1] Shanghai Jiao Tong Univ, Sch Biomed Engn, Shanghai 200240, Peoples R China
[2] Shanghai Jiao Tong Univ, Ruijin Hosp, Dept Nucl Med, Sch Med, Shanghai 200025, Peoples R China
[3] Univ Illinois Urbana & Champaign, Beckman Inst Adv Sci & Technol, Urbana, IL 61801 USA
[4] Univ Illinois, Dept Elect & Comp Engn, Urbana, IL 61801 USA
[5] Univ Illinois, Natl Ctr Supercomp Applicat, Urbana, IL 61801 USA
[6] Siemens Med Solut USA Inc, Urbana, IL 61801 USA
[7] Shanghai Jiao Tong Univ, Sch Med, Ruijin Hosp, Dept Neurosurg, Shanghai 200025, Peoples R China