1 23 Optical and Quantum Electronics ISSN 0306-8919 Volume 47 Number 2 Opt Quant Electron (2015) 47:257-265 DOI 10.1007/s11082-014-9910-6 Design and evaluation of a reflectance diffuse optical tomography system Hüseyin Özgür Kazanci, Tanju Mercan & Murat Canpolat