1. A system for estimating moisture content in a steam flow through a steam turbine, the system comprising: at least one laser assembly configured to illuminate at least a portion of the steam flow; at least one image sensor configured to obtain a plurality of digital images of the illuminated portion of the steam flow; and a computing device operatively coupled to the at least one image sensor, the computing device configured to: analyze the plurality of digital images to measure an amount of light that is scattered including scattering at least by the moisture content in the steam flow in each digital image; and compare the analysis of the plurality of digital images to estimate moisture content of the steam flow, wherein the analyzing includes analyzing a set of digital images taken over a period of time and averaging the analysis of each digital image together to determine an averaged amount of light scattered; and wherein the comparing includes comparing the averaged analysis of each digital image to estimate moisture content of the steam flow during the period of time.