Once the second edition was safely off to the printer, the 110 larger world of micro-CT and micro-MRI and the smaller world authors breathed a sigh of relief and relaxed, secure in the belief revealed by the scanning and transmission electron microscopes. that they would never have to do that again. That lasted for 10 To round out the story we even have a chapter on what PowerPoint years. When we ?nally awoke, it seemed that a lot had happened. does to the results, and the annotated bibliography has been In particular, people were trying to use the Handbook as a text- updated and extended....

Major improvements in instrumentation and specimen preparation have brought SEM to the fore as a biological imaging technique. In FESEM, a field-emission cathode placed in the electron gun of a scanning electron microscope provides narrower probing beams and high electron energy. The result is improved spatial resolution and minimized sample charging and damage. Images produced are less destroyed and have a spatial resolution down to 1.5 nm, three to six times better than conventional SEM.

Although this imaging technique has undergone tremendous developments, it is still poorly...