The effects of the approximation ΔD=0 that is often used in frequency-resolved optical diffusion imaging are examined. It is shown that this approximation can affect the performance of integral-equation-based approaches to optical diffusion imaging, such as the Born iterative method and the distorted Born iterative method. The approximation introduces errors into the calculation of data used in simulations, which can lead to misleading evaluations of reconstruction algorithms. Numerical calculations show the magnitude of these effects and the appearance of artifacts in reconstructed images when conventional inversion algorithms are applied to more accurately calculated data.
© 1998 Optical Society of America
(100.3010) Image processing : Image reconstruction techniques
(100.3190) Image processing : Inverse problems
(170.5280) Medical optics and biotechnology : Photon migration
(290.1990) Scattering : Diffusion
J. C. Ye, R. P. Millane, K. J. Webb, and T. J. Downar, "Importance of the (nabla) D term in frequency-resolved optical diffusion imaging," Opt. Lett. 23, 1423-1425 (1998)