Figure 3.

Agreement of readers stratified by experience: the panel shows the observed agreement between expert readers (A), non-expert readers (B) and pairwise observed agreement between expert and non-expert readers (C). The black square area indicates the exact observed agreement between the two operators while the white remaining area indicates the disagreement. We can observe that the agreement between expert readers is higher (A) compared to that observed with non-expert (B) or pairwise expert and non-expert readers (C).