title: Observation of low contrast biological specimens by annular type STEM darkfield method using signal processor.
mesh_terms: D000818:Animals; D007668:Kidney / Q000648:ultrastructure; D008099:Liver / Q000648:ultrastructure; D051379:Mice; D008854:Microscopy, Electron / Q000379:methods*; D008855:Microscopy, Electron, Scanning / Q000379:methods*; D009940:Organoids / Q000648:ultrastructure; D051381:Rats