Abstract:
:As a means to automate the three-dimensional histological analysis of brain tissue, we demonstrate the use of femtosecond laser pulses to iteratively cut and image fixed as well as fresh tissue. Cuts are accomplished with 1 to 10 microJ pulses to ablate tissue with micron precision. We show that the permeability, immunoreactivity, and optical clarity of the tissue is retained after pulsed laser cutting. Further, samples from transgenic mice that express fluorescent proteins retained their fluorescence to within microns of the cut surface. Imaging of exogenous or endogenous fluorescent labels down to 100 microm or more below the cut surface is accomplished with 0.1 to 1 nJ pulses and conventional two-photon laser scanning microscopy. In one example, labeled projection neurons within the full extent of a neocortical column were visualized with micron resolution. In a second example, the microvasculature within a block of neocortex was measured and reconstructed with micron resolution.
journal_name
Neuronjournal_title
Neuronauthors
Tsai PS,Friedman B,Ifarraguerri AI,Thompson BD,Lev-Ram V,Schaffer CB,Xiong Q,Tsien RY,Squier JA,Kleinfeld Ddoi
10.1016/s0896-6273(03)00370-2subject
Has Abstractpub_date
2003-07-03 00:00:00pages
27-41issue
1eissn
0896-6273issn
1097-4199pii
S0896627303003702journal_volume
39pub_type
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