Gregorio Millán Institute, Universidad Carlos III de Madrid, Leganés 28911, Spain.
Opt Lett. 2013 Mar 1;38(5):787-9. doi: 10.1364/OL.38.000787.
We study optical imaging of tissues in the mesoscopic scattering regime in which light multiply scatters in tissues but is not fully diffusive. We use the radiative transport equation to model light propagation and an ℓ1-optimization method to solve the inverse source problem. We show that recovering the location and strength of several point-like sources that are close to each other is not possible when using angle-averaged measurements. The image reliability is limited by a spatial scale that is on the order of the transport mean-free path, even under the most ideal conditions. However, by using just a few angle-resolved measurements, the proposed method is able to overcome this limitation.
我们研究介观散射范围内的组织光学成像，在该范围内，光在组织中多次散射，但不完全扩散。我们使用辐射传输方程来模拟光的传播，并使用 l1 优化方法来解决逆源问题。我们表明，当使用角度平均测量时，不可能恢复彼此靠近的几个点状源的位置和强度。即使在最理想的条件下，图像的可靠性也受到空间尺度的限制，该空间尺度与输运平均自由程相当。然而，通过仅使用几个角度分辨测量，所提出的方法能够克服这一限制。
