Figure 1.

Illustration of the interface for annotating signals during a period with an epidural injection. Both the FHR (in blue) and the MHR (in purple) are shown, together with their interpolations (lighter colors) during MS periods (for better visualization of samples that are isolated from the rest of the signal). The user has selected a window for training the model (in grey) and has annotated two periods with a true FHR signal (in blue) and one period with a false FHR signal (in red). The false signals are either the MHR or the MHR × 2. Here, the user is selecting a few false MHR signals (in cyan) inside the rectangular box.