Fig. 4: Time consumption for sonologists of three levels of expertise in recognizing fetal neurosonographic image patterns with three reading modes.

Compared with the median per-image reading time in unassisted mode, a slight increment in concurrent mode was observed, whereas the time was significantly prolonged in second mode for all sonologists (a); and sonologists of three expertise levels, respectively (b). The upper and lower bounds of the box refer to the 25th and 75th percentiles, and the line intersection in the box refers to the median. The dots outside of whiskers refer to outliers.