[1] Saratov NG Chernyshevskii State Univ, Dept Opt & Biophoton, Saratov 410012, Russia
[2] Precise Mech & Control Inst RAS, Saratov 410028, Russia
[3] Univ Oulu, Oulu 90014, Finland
[4] Univ Houston, Dept Biomed Engn, Houston, TX 77204 USA
[5] Univ Toronto, Ontario Canc Inst, Princess Margaret Hosp, Div Biophys & Bioimaging,Dept Med Biophys, Toronto, ON M5G 2M9, Canada
[6] Univ Toronto, Ontario Canc Inst, Princess Margaret Hosp, Div Biophys & Bioimaging,Dept Radiat Oncol, Toronto, ON M5G 2M9, Canada