Figure 2
From: A hidden Markov model for lymphatic tumor progression in the head and neck
Hidden Markov model with only one observation. \({\varvec{\pi}}\) denotes the healthy starting state. Horizontal arcs represent the transitions from a state. (\({\varvec{x}}\left[ {t - 1} \right]\)) to the state at the next time step (\({\varvec{x}}\left[ t \right]\)). The final state is then diagnosed (vertical arc, parametrized via sensitivity and specificity) and we observe \({\varvec{z}}\).
