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Figure 2 | Critical Care

Figure 2

From: Scanning laser Doppler is a useful technique to assess foot cutaneous perfusion during femoral artery cannulation

Figure 2

Schematic diagram of scanning laser Doppler technique. Thecomputer directs the mirror to scan the laser beam across the predesignatedarea. Reflected Doppler shifted light is decoded by the signal processor whichthen creates a colour-coded perfusion image on the computer screen. The wholeimage or areas within it can be outlined and perfusion within themautomatically calculated.

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