The 12 th Nordic Baltic Conference on Biomedical Engineering and Medical Phsics 18-22 June 2002, Reykjavik, Iceland : proceedings - Stefan B. Sigurdsson; Thordur Helgason,Egill Masson; Gardar Myrdal,Thordur Thorkeslsson (Icelandic Society of Biomedical Enginnering and Medical Physics (ISBEMP), 2002)