Real-time diffuse optical tomography based on structured illumination.
A new optical acquisition scheme based on a pair of digital micromirror devices is developed and applied to three-dimensional tomographic imaging of turbid media. By using pairs of illumination-detection patterns with a single detector, we were able to perform high-resolution quantitative volumetric imaging of absorption heterogeneities embedded in optically thick samples. Additionally, a tomographic reconstruction algorithm was implemented on a graphical processor unit to provide optical reconstructions at a frame rate of 2 Hz. The structured illumination method proposed in this work has significant cost advantages over camera systems, as only a single detector is required. This configuration also has the potential to increase frame rate.
Bélanger
Samuel
S
Ecole Polytechnique de Montréal, Département de Génie Electrique, Montréal, Québec, Canada.
Abran
Maxime
M
Intes
Xavier
X
Casanova
Christian
C
Lesage
Frédéric
F
D000465:Algorithms; D003198:Computer Simulation; D005583:Fourier Analysis; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D055616:Microtechnology; D009010:Monte Carlo Method; D009391:Nephelometry and Turbidimetry; D019047:Phantoms, Imaging; D041622:Tomography, Optical / Q000379:methods*