fig3
![A multi-channel photoplethysmography array with contact-force regulation for tonoarteriographic imaging](https://image.oaes.cc/ce5b4e8e-a75e-4095-8275-9d063f83aa73/chatmed3011.fig.3.jpg)
Figure 3. Examining the correlation between PPG waveform characteristics and CF via wrist extension experiments. PPG: photoplethysmography; CF: contact force.
Figure 3. Examining the correlation between PPG waveform characteristics and CF via wrist extension experiments. PPG: photoplethysmography; CF: contact force.
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