Serial Block-Face Scanning Electron Microscopy (SBF-SEM) of Biological Tissue Samples

Area of Science:

• Electron Microscopy
• Biological Imaging
• Microanatomy

Background:

• Serial block-face scanning electron microscopy (SBF-SEM) enables high-resolution 3D reconstruction of biological tissues.
• Successful SBF-SEM relies heavily on meticulous tissue preparation and optimized imaging parameters.
• Challenges include altered ultrastructure from improper preparation and image artifacts like "tissue charging".

Purpose of the Study:

• To present a routine protocol for SBF-SEM sample preparation.
• To detail imaging considerations for high-quality serial image acquisition.
• To address and mitigate common SBF-SEM challenges such as tissue charging and block damage.

Main Methods:

• Development of a standardized tissue preparation protocol.
• Optimization of imaging parameters to balance resolution and sample integrity.
• Implementation of techniques to reduce electron beam-induced artifacts.

Main Results:

• The protocol effectively preserves cellular ultrastructure.
• The method significantly diminishes "tissue charging" artifacts.
• High-quality serial images were acquired rapidly with minimal resin block damage.

Conclusions:

• Optimized tissue preparation and imaging are crucial for reliable SBF-SEM.
• The presented protocol facilitates high-fidelity 3D ultrastructural analysis.
• This approach enhances the utility of SBF-SEM for microanatomy studies.