云层中的飞机、暗蓝色海水下的潜艇和乳房组织内的癌肿均有一个共同点:它们都隐藏在高散射介质中。通过这种介质成象仍是科学与工程的最棘手问题之一,但随着超快激光器和探测器的出现,再加上一系列时间分辨技术, The planes in the clouds, the submarine in the dark blue sea, and the cancer in the breast tissue all have one thing in common: they are all hidden in high-scattering media. Imaging through such media is still one of the thorniest issues in science and engineering, but with the advent of ultrafast lasers and detectors, coupled with a series of time-resolved technologies,