Author Affiliations

Tommi Noponen,^1,2,* Markku Paloheimo,³ Pekka Meriläinen,¹ Timo Kajava,¹ Kalle Kotilahti,^1,2 Ilkka Nissilä,^1,2 and Toivo Katila^1,2

¹Laboratory of Biomedical Engineering, Helsinki University of Technology, PO BOX 2200, 02015 HUT, Finland

²Helsinki Brain Research Centre, Helsinki University of Technology, PO BOX 2200, 02015 HUT, Finland

³Department of Anesthesia and Intensive Care Unit, Eye Hospital, Helsinki University Central Hospital, Haartman Street 4E, 00029 HUS, Finland

^*Corresponding author: tommi.noponen@hut.fi