Fig. 1.

Fluorescence laparoscope for visualization and localization of green fluorescent protein (GFP)-labeled tumors in mice. A laparoscopic tower was modified to achieve a fluorescence light mode that would permit detection of fluorescence signals while still allowing visualization of the background tissue. A 480-nm short-pass filter was placed between the light cable and the laparoscope. A GG495 glass filter was placed between the laparoscope and a camera that controls exposure time and gain. These parameters were set to 110 ms and 97, respectively, for the purpose of our experiment