Technical foundations for noninvasive assessment of changes in the width of the subarachnoid space with near-infrared transillumination-backscattering sounding (NIR-TBSS). - Andrzej F. Frydrychowski; Wojciech Guminski; Miroslaw Rojewski; Jacek Kaczmarek; Witold Juzwa (IEEE Trans. Biomed. Eng., 2002)