Costin, Hariton, 1. Faculty of Medical Bioengineering, Grigore T. Popa University of Medicine and Pharmacy, Iasi, Romania; M. Kogalniceanu Str., No. 9-13, 700454, Iasi, Romania; 2. Institute of Computer Science of Romanian Academy, Iasi Branch, Carol I Blvd., No. 11, 700506, Iasi, Romania