DQE of a new K2 summit Update, gain corrected.

After carefully gain corrected, the DQE of our K2 summit measured again and compared them to the DQE curve of a K2 image provided by Niko on this Web page. The red curve is from a low dose rate (3e/pixel/second) movie by Thomas. It is significantly better than Niko's (blue) imaged at similar dose rate and total dose.