We present the first, to our knowledge, experimental images of complex-shaped phantoms embedded in diffuse media by use of optical tomography. Imaging is based on a complete-angle projection tomographic technique that utilizes transmitted early photons. Results are contrasted with measurements obtained at later gates as well as pseudocontinuous-wave data. The scanning system developed employs noncontact illumination and detection technologies that allow for high spatial sampling of transmitted photons. Combining this system with complete-angle illumination is found to be an important strategy toward improved imaging performance, resulting in a better-posed inversion problem. The appropriateness of reconstruction algorithms similar to those employed in x-ray computed tomography are showcased, and suggestions for model improvements are provided.
© 2005 Optical Society of AmericaFull Article | PDF Article
Gerhard Mitic, Jochen Kölzer, Johann Otto, Erich Plies, Gerald Sölkner, and Wolfgang Zinth
Appl. Opt. 33(28) 6699-6710 (1994)
Andrei V. Bronnikov and Gerrit Duifhuis
Appl. Opt. 37(20) 4437-4448 (1998)
R. Cubeddu, A. Pifferi, P. Taroni, A. Torricelli, and G. Valentini
Appl. Opt. 35(22) 4533-4540 (1996)