Fimbriae are only visible with the use of an electron microscope. Perichromatin fibrils are visible only under electron microscope. Vampire DNA is invisible under an electron microscope. Studies of the cut marks on bones using an electron microscope produce a similar result. Ultramicrotomy is a method of preparing extremely thin sections for transmission electron microscope (TEM) analysis. The FIB is also commonly used to prepare samples for the transmission electron microscope. Deciding to take a different route they looked at it under an electron microscope. Detailed observations were made with the use of a scanning electron microscope. A single excavation site exposes a cross section for analysis using a scanning electron microscope. Calibration is attempted using standard samples measured by transmission electron microscope (TEM). Biological tissue has little inherent contrast in either the light or electron microscope. Individual nanotubes are then located via atomic force microscope or scanning electron microscope. Small striations can be seen with the aid of a scanning electron microscope. The skeleton was analyzed using radiography and a scanning electron microscope. Integrated correlative microscopy combines a fluorescence microscope with an electron microscope.