Abstract
The laser scanning confocal microscope (LSCM) is a valuable research tool for imaging fluorescently labeled biological specimens. Rather than cutting sections of the tissue with a knife, it is now possible to produce relatively noninvasive "optical sections" using the LSCM as an imaging tool. This has made the imaging of living cells in situ more of a practical option. This minireview briefly describes some of the improvements made to the LSCM over the past 5 years and, in more detail, outlines many of the current biomedical applications of the LSCM, including single and multiple labeling of fixed and living specimens, physiological imaging, 3-dimensional imaging, and the use of the LSCM for lineage tracing and in correlative microscopy.

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