Fluorescence images of captured cancer cells and WBCs. (a) Examples of DAPI (blue, positive), CK (green, positive), and CD45 (red, negative) fluorescence images of a captured Colo205 cell along with DAPI (blue, positive), CK (green, negative), and CD45 (red, positive) fluorescence images of two WBCs. (b) Fluorescence images of a captured PC3 (prostate cancer cell line). (c) Fluorescence images of a captured SkBr3 (breast cancer cell line).