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Dual-Channel Acquisition

Two fluorescence channels for nuclear reference plus reporter

Definition
Simultaneous or sequential capture of two fluorescence channels, typically DAPI for nuclei and GFP for a reporter, producing co-registered image pairs that enable marker-positive cell classification on a per-nucleus basis.
Co-Registered
Both channels captured at identical positions
Filter Switching
Automatic excitation and emission filter changes

The Two-Channel Paradigm

The most common PanoBrain configuration captures two channels per section:

  • Channel 1 — DAPI: Labels all nuclei, providing the reference for cell detection and total cell counts
  • Channel 2 — GFP (or other reporter): Labels the population of interest (transduced neurons, transgenic cells, activity-dependent expression)

Because both channels are captured at the same tile positions, they are inherently co-registered — each DAPI nucleus can be directly checked for GFP signal without image alignment.

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