Effect of the Arrangement of Optodes for 3D Diffuse Optical Tomography

Diffuse optical tomography (DOT) can obtain tomographic images of hemodynamics such as the oxygenation state and blood volume in tissues using light in the near infrared wavelength range where tissues absorb light weakly and oxy- and deoxy-hemoglobins show different absorbing characteristics. For 3D-DOT, much more optodes than those for 2D-DOT are desirable for high quality images. But practically the number of the optodes is limited and it is necessary to find the optimum arrangement of the optodes. This paper studies the effect of the optode arrangement on the reconstructed images by simulation of 3D-DOT when the number of the optodes is 16 and the object is a sphere with a diameter of 100 mm. Simulation results show that the optode arrangement which can effectively detect the light propagating through the target is important to reconstruct the target at the correct positions.