1 Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Währinger Gürtel 18-20, AKH 4L, 1090, Vienna, Austria.
2 Dipartimento di Elettronica e Telecomunicazioni, Biolab, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129, Torino, Italy.
3 Department of Dermatology, Medical University of Vienna, Währinger Gürtel 18-20, AKH 7J, 1090, Vienna, Austria.
4 Department of Medical Physics and Biomedical Engineering, University College London, Gower Street, WC1E 6BT, London, UK.
5 Insight Photonic Solutions, Inc., 2650 Crescent Drive, Number 201, Lafayette, CO, 80026, USA.
6 Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Währinger Gürtel 18-20, AKH 4L, 1090, Vienna, Austria. mengyang.liu@meduniwien.ac.at.